National Aeronautics and Space Administration

rockets
Educator Guide
www.nasa.gov
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rocket
Pronunciation: \rä-kət\ noun (It rocchetta)

A vehicle, typically cylindrical, containing liquid or solid

propellants which produce hot gases or ions that are
ejected rearward through a nozzle and, in doing so,
create an action force accompanied by an opposite and
equal reaction force driving the vehicle forward. Because
rockets are self-contained, they are able to operate in
outer space.

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National Aeronautics and Space Administration

ROCKETS
Educator’s Guide with Activities in
Science, Technology, Engineering and Mathematics

This publication is in the Public Domain and is not protected by copyright.

Permission is not required for duplication.

EG-2011-11-223-KSC
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Acknowledgements
The original Rockets Teacher Guide was Special Thanks To:
published by NASA’s Education Division in the NASA Headquarters
early-1990s. It has found widespread use in Jerry G. Hartman
both formal and informal educational settings Merrill King, Ph.D.
because of the exciting nature of the topic and
because of its dynamic classroom activities NASA Kennedy Space Center
that match and support both national and state Gregg Buckingham, Ed.D.
education standards for science, mathematics, Lesley Fletcher, Ph.D.
and technology. Sharon Fegan
Cheryl Johnson-Thornton
This revision of the guide, by the original Jessica Paglialonga
authors, updates educators on NASA’s Space James Suderman
Launch System consisting of versatile launch
vehicles that will carry astronauts to orbit, to Marshall Space Flight Center
the realm of the Moon, Mars, and the asteroids. Robert Armstrong
It builds on classroom experience with the Mike Crabb
original guide and presents a suite of improved Susan Hesssler
and new activities that prepare students for the Twila Schneider
future of space exploration. Holly Snow

Many educators and scientists have Pennsylvania State University

contributed ideas and content directly and James Gerard
indirectly to this revision. Their assistance is Les Gold
gratefully appreciated.

Authors:
Shearer Vogt and Associates, LLC
Deborah A. Shearer, M.S.
Gregory L. Vogt, Ed.D.

Editor:
Maury Solomon

Graphics Support:
Martha S. Young, B.F.A.

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Dear Educators:
More than 50 years has passed since the National Aeronautics and Space Administration was
created to explore the atmosphere and space. It has been an amazing time that carried humans
into space and onto the Moon. Robot spacecraft explored all of the planets and satellites
gave us a new view of Earth. A giant space station was constructed, serving as a microgravity
laboratory and home to astronauts from many nations. Other satellites looked out into the galaxy
and beyond, almost to the beginning of time. These and other amazing events became possible
because of one technology - rockets.

We stand on the edge of a new era in space exploration and rockets will take us there. Using the
next generation of rockets, human presence will soon extend beyond the confines of Earth orbit.
Powerful and versatile new vehicles will enable humans to return to the Moon and travel to Mars
and the asteroids. The best ideas of our space exploring past are being merged with our dreams
for the future. It is a wonderful time for you and your students to learn about science, technology,
engineering, and mathematics. Rockets will be your vehicle for learning.

The Rockets Educator Guide provides you and your students many opportunities. Together, you
will examine early rockets and meet thinkers and dreamers. You will learn about rocket science
and mathematics and what rocket scientists do. You will see pictures of events and technologies
that many of us grew up with - Sputnik, Apollo, and the space shuttle to name a few. You will see
the future of space transportation. You will learn why rockets are the only vehicles that can “go
where no one has gone before.”

Will your students be a part of this future in space? Will they be the scientists, technicians,
engineers, and mathematicians that make dreams of exploring space possible? Yes! This guide
will help you prepare them for the wonders that are coming.

Chapters within the guide present the history of rocketry, NASA’s Space Launch System, rocketry
principles, and practical rocketry. These topics lay the foundation for what follows - a wealth of
dynamic rocket science classroom activities that work. The activities focus on Sir Isaac Newton’s
laws of motion and how they apply to rockets. They incorporate cooperative learning, problem
solving, critical thinking, and hands-on involvement. They support national and state standards
for science, mathematics, and technology across many grade levels.

All of the activities are designed with the classroom in mind. They include clear descriptions,
background information for the teacher and student, detailed procedures and tips, lists of readily
available materials, assessments, questions for discussion, and extensions. The activities are
designed to foster excitement and a passion for learning.

The guide is versatile. It has been created as a two to six week classroom unit depending upon
the grade level of the students but individual activities can be extracted and used as stand-alone
classroom experiences. You will find activity objectives and principles clearly stated along with
the vocabulary terms necessary for understanding the principles involved.

The goal of the Rockets Educator Guide is to excite young minds. Among your students are
future leaders, planners, builders, explorers, settlers, and interplanetary pilots! This guide will help
you lay the groundwork for their future in space.
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Table of Contents
Letter to Educators. . . . . . . . . . . . . . . . . . . . . . . . . . . ii
A Pictorial History of Rockets. . . . . . . . . . . . . . . . . . . 1
What Comes Next . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
How Rockets Work. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Applying Newton’s Laws. . . . . . . . . . . . . . . . . . . . . . . 24

Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
National Standards Matrix. . . . . . . . . . . . . . . . . . . 31
Suggested Grade Levels . . . . . . . . . . . . . . . . . . . . 33
Pop Can “Hero Engine”. . . . . . . . . . . . . . . . . . . . . 34
3...2...1...PUFF!. . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Heavy Lifting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Newton Car . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Rocket Races . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Pop! Rocket Launcher. . . . . . . . . . . . . . . . . . . . . . 63
Pop! Rockets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Foam Rocket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Launch Altitude Tracker. . . . . . . . . . . . . . . . . . . . . 80
_______________________
_______________________
DISCONTINUED High-Power Paper Rocket Launcher. . . . . . . . . . . 86
High-Power Paper Rockets. . . . . . . . . . . . . . . . . . 91
Rocket Wind Tunnel . . . . . . . . . . . . . . . . . . . . . . . 97
Advanced High-Power Paper Rockets. . . . . . . . 103
Water Rocket Launcher. . . . . . . . . . . . . . . . . . . 109
Water Rocket Construction . . . . . . . . . . . . . . . . 114
Project X-51. . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Rocket Scientist Certificate. . . . . . . . . . . . . . . . 138
Careers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Above and Beyond-Additional Explorations . . . 140
How High? . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Science Fiction . . . . . . . . . . . . . . . . . . . . . . . 144
Space Art . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
NASA Educational Resources. . . . . . . . . . . . . . . . . 149
Evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

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A Pictorial The mighty space rockets of today are the
result of more than 2,000 years of invention,

History of
experimentation, and discovery. First by
observation and inspiration and then by
methodical research, the foundations for

Rockets
modern rocketry were laid.
Building upon the experience of two
millennia, new rockets will expand human
presence in space back to the Moon, to Mars
and the asteroids, and beyond. These new
rockets will be versatile. They will support
Earth orbital missions, such as the International
Space Station, and off-world missions millions
of kilometers from home. Already, travel to
the stars is possible. Robot spacecraft are on
their way into interstellar space as you read
this. Someday, they will be followed by human
explorers.
Often lost in the shadows of time,
early rocket pioneers “pushed the envelope”
by creating rocket-propelled devices for
land, sea, air, and space. When the scientific
principles governing motion were discovered,
rockets graduated from toys and novelties to
serious devices for commerce, war, travel, and
research. This work led to many of the most
amazing discoveries of our time.
The vignettes that follow provide a small
sampling of stories from the history of rockets.
They form a rocket time line that includes
critical developments and interesting sidelines.
In some cases, one story leads to another, and
in others, the stories are interesting diversions
from the path. They portray the inspirations
that ultimately led to us taking our first steps
into outer space. NASA’s new Space Launch
System (SLS), commercial launch systems,
and the rockets that follow owe much of their
success to the accomplishments presented
here.

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 Steam, Sparks, Explosions, and Flight
Archytas, 428 to 347 B.C.
Archytas, a Greek philosopher, mathematician, and astronomer was
said to have constructed and flown a small bird-shaped device that
was propelled by a jet of steam or compressed air. The ‘bird’ may
have been suspended by a wire or mounted at the end of a bar that
revolved around some sort of pivot. This was the first reported device
to use rocket propulsion.

Hero Engine, c. A.D. 10 to 70

Though not a rocket, the main principle behind rocket (and jet)
propulsion was employed in a steam engine invented by Hero of
Alexandria. The exact appearance of Hero’s engine is not known, but
it consisted of some sort of copper vessel heated by a fire beneath.
Water in the vessel turned into steam and traveled up two tubes to
a hollow sphere that was free to rotate. Two L-shaped tubes from
the sphere allowed the steam to escape in jets of gas. The sphere
rotated rapidly in the opposite direction of the jets. The Hero engine
was seen as an amusing toy, and its potential was not realized for a
thousand years.

Chinese Fire Arrows, A.D. 1232

The origins of gunpowder are not clear, but the Chinese reportedly
had a rudimentary form of it in the first century, A.D. A mixture of
saltpeter, sulfur, and charcoal dust produced colorful sparks and
smoke when ignited. The powder was used to make fireworks.
Tubes of bamboo and leather, closed off at one end, were packed
with gunpowder. Depending upon how the powder was packed
and the size of the opening, a fountain of sparks or a bang
would result when the powder was ignited. It is likely that some
fireworks skittered about because of the thrust produced from
the gases escaping the open end. Thus the rocket was born. By
1232, these primitive rockets were attached to arrows and used to
repel Mongol invaders in the battle of Kai-keng.

Roger Bacon, c. 1214 to c. 1292

A monk, Bacon wrote about gunpowder in his The Epistola Fratris R.
Baconis, de secretis operibus artis et naturase et nullitate magiae:
“We can, with saltpeter and other substances, compose artificially a fire
that can be launched over long distances....By only using a very small
quantity of this material much light can be created accompanied by a
horrible fracas. It is possible with it to destroy a town or an army....”
Bacon is thought to have developed improved gunpowder
formulas that greatly increased the mixture’s power.

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Wan Hu, Sixteenth Century
According to legend Wan Hu, a Chinese stargazer and local official
living sometime around the middle of the Ming dynasty, dreamed
of spaceflight. He constructed a chair and attached 47 gunpowder
rockets to its base. In some versions of the story, his chair also
had kite wings. On launch day, 47 assistants rushed up and
simultaneously lit the fuses of all the rockets. A huge explosion
followed. When the smoke cleared, Wan Hu was gone. Some have
suggested Wan Hu actually made it into space, and you can see him
as the “Man in the Moon.” Regardless of the actual end, Wan Hu
had the right idea—use rockets to travel into space.

Rockets Go to War
For centuries to come, rockets competed with cannons as the
weapon of choice for war. Each technological development
moved one or the other system into or out of favor. Cannons were
more accurate. Rockets could be fired more quickly. Breech-
loading cannons speeded up the firing. Rocket fins increased
accuracy. Cannons had greater range. Rockets had greater
range. And so on. Invention abounded. Invented by Joanes
de Fontana of Italy (1420), a surface-running rocket torpedo was
supposed to set enemy ships on fire.

Kazimierz Siemienowicz, c. 1600 to c. 1651

Kazimierz Siemienowicz, a Polish-Lithuanian commander in the Polish Royal
Artillery, was an expert in the fields of artillery and rocketry. He wrote a
manuscript on rocketry that was partially published before his death. In Artis
Magnae Artilleriae pars prima, he published a design for multistage rockets
that was to become a fundamental rocket technology for rockets heading
for outer space. Siemienowicz also proposed batteries for military rocket
launching and delta-wing stabilizers to replace the guiding rods currently in
use with military rockets. It was rumored that Siemienowicz was killed by
members of guilds that were opposed to him publishing their secrets, and
they hid or destroyed the remaining parts of his manuscript.

The Birth of Rocket Science

Galileo Galilei, 1564 to 1642
In addition to his many other accomplishments, this Italian astronomer
and mathematician rekindled the spirit of scientific experimentation
and challenged old beliefs relating to mass and gravity. He proved
that an object in motion does not need the continuous application
of force to keep moving. He called this property of matter, which
causes it to resist changes in velocity, “inertia.” Inertia is one of the
fundamental properties that Isaac Newton would later incorporate into
his laws of motion.
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Newton’s Laws of Motion, 1642 to 1727
English scientist Sir Isaac Newton condensed all rocket science into
three elegant scientific laws. Published in Philosophiae Naturalis
Principia Mathematica his laws, previously understood intuitively
by early rocketeers, provided the foundation for all modern rocket
science. (The “Rocket Principles” chapter focuses on these laws
and the “Practical Rocketry” chapter demonstrates the applications
of these laws.)

Colonel William Congreve, 1772 to 1828

Following stunning rocket barrages against the British by the
forces of Tippoo Sultaun of India, William Congreve took charge
of British military rocket companies. Some of his designs had
operational ranges of 6,000 yards. He created both case-shot
rockets that sprayed the enemy with carbine balls and incendiary
rockets for burning ships and buildings. He invented launching
rockets from ships. The phrase “by the rocket’s red glare,” coined
by Francis Scott Key during the War of 1812, referred to British-
launched Congreve rockets.

Jules Verne, 1828 to 1905

The dream of traveling through space was brought to life by French
science fiction writer Jules Verne. In his De la Terre á la Lune, Verne
used a giant cannon to fire a manned projectile at the Moon. Although
not a rocket, the projectile had some interesting parallels with the
future Apollo Moon program. It was called the Columbiad and
contained a crew of three. It was fired at the Moon from Florida. The
Apollo 11 capsule was named Columbia, contained a crew of three,
and was launched from Florida. Verne correctly described how the
crew would feel “weightless” on their voyage. Of course, the crew
would not have survived the initial acceleration of the cannon firing.
Nevertheless, Verne, an early space exploration visionary, fired the
imaginations of many would-be rocketeers and future astronauts.

Modern Rocket Pioneers

Konstantin E. Tsiolkovski, 1857 to 1935
Konstantin Tsiolkovski was a teacher, theorist, and astronautics
pioneer. Son of a Polish forester who emigrated to Russia, he wrote
and taught extensively about human space travel and is considered
the father of cosmonautics and human spaceflight. Tsiolkovski
advocated liquid propellant rocket engines, orbital space stations,
solar energy, and colonization of the Solar System. His most famous
work, “Research into Interplanetary Space by Means of Rocket
Power,” was published in 1903, the same year the Wright brothers
achieved powered and controlled airplane flight. His rocket equation,
based on Newton’s second law of motion, relates rocket engine
exhaust velocity to the change in velocity of the vehicle itself.
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Robert H. Goddard, 1882 to 1945
American college professor and scientist Robert Goddard built
and flew the world’s first liquid propellant rocket on March 16,
1926. Its flight, though unimpressive (it climbed only 12.5 meters),
was the forerunner of the Saturn V Moon rocket 43 years later. At
the request of local townsfolk, Goddard moved his experiments
from Auburn, Massachusetts, to the deserts around Roswell, New
Mexico. There he continued his experiments and developed a
gyroscope system to control his rockets in flight, instrumentation
payload compartments, and parachute recovery systems. He is
often referred to as the “father of modern rocketry.”

Hermann Oberth, 1894 to 1989

Hermann Oberth, a Romanian by birth and a naturalized German
citizen, became fascinated by the works of Jules Verne and
devoted his life to promoting space travel. His dissertation for
the University of Heidelberg, rejected for being too speculative,
became the basis for his book Die Rakete zu den Planetanraumen
(By Rocket to Space). The book explained the mathematics
of spaceflight and proposed practical rocket designs and
space stations. This and other books inspired a generation
of rocketeers. Rocket societies sprang up around the world,
including the German Verein fur Raumschiffart (Society for Space
Travel) that led to the development of the V2 rocket.

Rocket Experimenters, Early Twentieth Century

In the 1920s and 1930s, leading up to World War II, amateur
rocketeers and scientists worldwide attempted to use rockets on
airplanes, racing cars, boats, bicycles with wings, throw lines for
rescuing sailors from sinking ships, mail delivery vehicles for off-
shore islands, and anything else they could dream up. Though
there were many failures, experience taught the experimenters
how to make their rockets more powerful and more reliable.

World War II

Flying Bombs
The necessities of war led to massive technological improvements
in aeronautics and rocketry. Almost overnight, rockets graduated
from novelties and dream flying machines to sophisticated
weapons of destruction. Rockets propelled nearly unstoppable
German fighter planes and Japanese Kamikaze pilots with bombs
into ships. War would never be the same again.

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Vergeltungswaffe 2 - V2
In the late 1930s, the German Verein fur Raumschiffart Society for
Space Travel evolved into the team that built and flew the most
advanced rocket for the time, the V2. On the shores of the Baltic
Sea, the team, under the directorship of Wernher von Braun, created
a rocket powered by alcohol and liquid oxygen. With a range of
200 miles and a maximum altitude of 55 miles, the V2 could deliver
a 1-ton explosive warhead to the heart of London without warning.
Thousands of V2s were built, but they entered the war too late to
affect the outcome.

The Space Age Begins

Bumper Project
At the conclusion of the war in Europe, 300 trainloads of V2
rockets and parts were captured and shipped to the United States
along with the majority of the principal designers, who decided
beforehand to surrender to American troops. The V2 became the
basis of the intercontinental ballistic missile development program
and led directly to the manned space program. Employing one of
the captured V2 rockets with a WAC Corporal rocket (named for
the Women’s Army Corps) at its top, the initial launch of a “Bumper-
WAC” took place on May 13, 1948. During six flights, the largest
two-stage rocket launched to date in the United States eventually
reached an altitude of almost 400 kilometers (250 miles).

The World’s First Artificial Satellite

At the conclusion of World War II, the United States and the Soviet
Union engaged in a race for space. The Soviet Union won the first
round by launching its Sputnik I satellite on October 4, 1957. The
satellite had a spherical design with four antenna. It weighed 83.6
kilograms (184.3 pounds). Two months later, the 508.3-kilogram
(1,118.26-pound) Sputnik II reached space with a living passenger.
Laika, a small dog, orbited Earth for a few hours. Although she
died in space, she led the way for all humans that followed.

Explorer 1
The United States entered the satellite-launching business on
January 31, 1958 with the successful launch of Explorer 1. The
satellite was launched atop the Juno 1, a modified Jupiter-C booster.
Though much smaller than the Sputniks, only 13.93 kilograms (30.66
pounds)—Explorer 1’s Geiger counter made the first important
discovery about the space environment. Explorer 1 detected around
Earth what would later be called the Van Allen Radiation Belts.

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 X-15
Between 1959 and 1968, the X-15 experimental aircraft flew to
the edge of space. In 199 flights, the air-launched rocket plane
broke many flight records, including speed (7,274 kph or 4,520
mph) and altitude records (108 kilometers or 67 miles). Test flights
established important parameters for attitude control in space and
reentry angles. Neil Armstrong, the first American to step on the
Moon, was one of twelve X-15 pilots.

Yuri Gagarin Goes Into Orbit

On April 12, 1961, space became the domain of humans with the
launch of cosmonaut Yuri Gagarin. His spaceflight lasted 1 hour and
48 minutes. During that time, Gagarin orbited Earth one time inside his
Vostok 1 space capsule, reaching a maximum altitude of 315 kilometers
(196 miles). Upon reentry, Gagarin ejected himself from the capsule at
an altitude of 6,100 meters (20,000 feet) and parachuted safely to the
ground.

Freedom 7
On May 5, 1961, American astronaut Alan Shepherd, Jr., lifted off
from Cape Canaveral, Florida, inside his Freedom 7 Mercury space
capsule, which sat atop a Redstone rocket. The rocket did not
have enough power to send the craft into orbit, and Shepherd made
a suborbital flight reaching 187 kilometers (116 miles) before his
capsule returned to Earth in an ocean splashdown 15 minutes 22
seconds later.

Moon Rocket
Just days after Alan Shepard’s flight, President John F. Kennedy
addressed a joint session of Congress and challenged America to
send an American to the Moon and return him safely before the end of
the decade. Although it was a shockingly bold announcement, some
of the steps to accomplish this mission were already underway. NASA
had begun work on components of a rocket capable of a round trip
lunar flight. By the next year, the rocket was named the Saturn V. It
would be 110.6 meters or 363 feet tall, dwarfing all previous rockets.
The Saturn V would consist of three stages, a capsule with a small
propulsion unit for the return trip, and a two-stage lunar lander.

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Glenn Orbits Earth
On February 20, 1962, riding on a more powerful missile, the Atlas,
astronaut John H. Glenn, Jr., became the first American to go into
orbit. Glenn’s flight achieved parity with the Soviet program. Glenn
orbited Earth three times for a total of 4 hours and 55 minutes in
space. A sensor switch led to an early return. The sensor indicated
that the Mercury capsule heat shield was loose, but the shield was
later determined to be firmly in place during flight. The sensor was
faulty. The last of the six Mercury flights took place on May 15, 1963,
with astronaut Gordon Cooper remaining in space for nearly a day
and a half.

Preparing for the Moon

Project Gemini followed the Mercury missions. The Gemini space
capsule, riding on top of a Titan missile, contained two astronauts.
During missions lasting up to 14 days, Gemini astronauts pioneered
spacewalking, spacecraft rendezvous, and docking procedures.
Important spacecraft systems, needed for the coming Moon flights,
were evaluated. Ten Gemini missions were flown during 1965 and
1966. The Titan rocket, initially created as an intercontinental ballistic
missile, went on to carry the Viking spacecraft to Mars and the
Voyager spacecraft to the outer solar system in the 1970s.

Dr. Wernher von Braun

One of the leading figures in the development of pre-war Germany’s
rocket program and the development of the V2 missile, von Braun
(1912-1977) became a leading proponent of America’s space program.
He entered the United States after the war and became a naturalized
citizen. He worked on the development of intercontinental ballistic
missiles and led the development team that launched Explorer 1.
Dr. von Braun was the chief architect and engineer of the Saturn V
Moon rocket. His popular writings and collaboration with Disney on a
“Tomorrowland” TV series did much to inspire the next generation of
rocket scientists and astronauts.

Gene Roddenberry
Gene Roddenberry (1921-1991), a distinguished World War II bomber pilot
and commercial pilot, began his writing career penning stories about flying.
He began writing for television and developed a concept for a “western”
series set among the stars. For three years (1966–1968), the Star Trek series
explored a wide range of scientific and social issues as humans traveled
across the galaxy. The series became so popular that the first space shuttle
orbiter test vehicle was named Enterprise after the star ship Enterprise. The
original show spawned several companion series and a string of movies.
Roddenberry, a visionary, inspired a generation of space travelers.

8
“One Small Step...”
At 10:56 p.m. EDT, July 20, 1969, American astronaut Neil Armstrong
set foot on the Moon. It was the first time in history that humans had
touched another world. He was followed to the surface by Edwin
“Buzz” Aldrin, Jr. A third astronaut, Michael Collins, remained in
lunar orbit in the Apollo capsule. The Apollo 11 mission was the first
of six Moon landings extending to the end of 1972. The astronauts’
spacecraft, the lunar module, consisted of a descent and an ascent
stage. The descent stage had four legs and a powerful rocket engine
to slow the craft for landing on the Moon. After surface explorations,
the upper part of the lander lifted off, using its own rocket engine,
and rendezvoused with the Apollo capsule for the return to Earth.

Skylab
Using a modified third stage of the Saturn V rocket, the United
States finally launched its first space station, called Skylab, into
Earth orbit in 1973. Rather than engines and fuel tanks, the interior
of the third stage was fitted with living quarters and laboratories for
three astronauts on extended stays in space. Solar panels provided
electric power. Due to a problem during launch, one of the large
panels was lost. Nevertheless, three crews of astronauts called
Skylab home until 1974. The last crew remained in space 84 days.

Smaller Saturn
The Saturn V rocket was capable of launching 117,900 kilograms
(260,000 pounds) into low Earth orbit and 40,800 kilograms (90,000
pounds) to the Moon. For some Apollo missions, though, a smaller
Saturn was called for. The Saturn IB was 68 meters (224 feet) tall
and required a scaffold platform nicknamed the “milk stool” to be
placed on the pad designed for Saturn V rockets. This enabled the
Saturn IB to match up with swing arms from the launch structure.
The Saturn IB carried some of the early Apollo test missions, the
three crews for Skylab, and the American crew for the 1975 historic
Apollo-Soyuz mission, linking astronauts and cosmonauts in orbit.

Orbits and Probes

Deep Space
The Titan rockets (1959–2005), used for launching the Gemini
missions, found wide use in launching unmanned payloads.
Upgraded versions of Titans lofted heavy satellites into Earth orbit and
propelled important spacecraft to other planets. The Viking missions
to Mars and the Voyager missions to the outer planets and interstellar
space are among its credits.

9
Sounding Rockets
Although rockets have generally gotten larger and more powerful,
there are many reasons for flying smaller rockets. The Canadian–
designed Black Brant sounding rocket has been flying since 1961 and
has successfully completed over 800 flights carrying small payloads
such as cameras, instruments, and microgravity experiments.
The Black Brant’s reliability and low cost has made it a favorite of
researchers. The biggest multistage Black Brants have payload
capacities of about 100 kilograms (220 pounds) and can reach
altitudes of up to 900 kilometers (560 miles).

Delta Family
With roots going back to the early 1960s, the American Delta rocket is
one of the most versatile of the commercial and military payload launch
rockets. Delta has many configurations, including multiple stages and
heavy-lift strap-on boosters that increase payload capacity to high
orbits. The Delta family has logged more than 325 launches, with a
success rate exceeding 95 percent.

Atlas
Like the Delta rocket, the Atlas has deep roots. Now in its fifth major
configuration, the Atlas was created as a missile in the 1950s. It was
adapted to carry John Glenn and three other Mercury astronauts to
space and has since been used for many commercial, scientific, and
military satellite launches and interplanetary missions. The Atlas V
rocket (shown) is the latest in the series.

Pegasus
Like the mythological creature, the Pegasus launch vehicle is
winged. Lifted to about 12,000 meters it is then air-launched
from under the wing of a carrier aircraft. This arrangement
keeps launch costs low for small orbital payloads.

Thirty Years
The space shuttle was a new concept for carrying crews and payloads into
low Earth orbit. It consisted of a central external tank surrounded by two
solid rocket boosters and a winged orbiter. Only the orbiter, a spacecraft/
airplane/space truck, actually reached orbit. It was designed to be reusable
as were the solid rocket boosters. A new external tank was needed for
each mission. Inside a cavernous payload bay were science laboratories,
space probes, telescopes, or Earth-sensing systems. Many shuttle
payloads consisted of components for the International Space Station. At
the end of a shuttle mission, the orbiter reentered Earth’s atmosphere and
glided to an unpowered landing on a runway. The first space shuttle flight
took place in 1981 and the last of its 135 missions concluded in 2011.
10
 The Space Launch System and a New Era of Commercial Space Fight

The Space Launch System

A new and different kind of rocket is needed as NASA prepares to extend its
mission beyond low-Earth orbit and out into the solar system. The Space Launch
System (SLS) will be used for Earth orbital flights and long-range missions to
places like asteroids or Mars and its moons. The SLS rocket will be the most
powerful launch vehicle in history and it is being developed in two phases:
• Heritage hardware (components from previous rockets) is being used to build a
heavy-lift rocket for development testing from 2017 to 2021. It will lift up to 70
metric tons of payload. This rocket will make two lunar flybys carrying an Orion
spacecraft, the second with a crew.
• The advanced SLS rocket will lift up to 130 metric tons including equipment,
cargo, scientific experiments, and/or the Orion spacecraft into deep space.

The Dragon and the Falcon

The Dragon is the first orbital spacecraft launched and recovered
by a private company. As one of several private endeavors under
NASA’s Commercial Orbital Transportation Services program, Dragon
was developed by Space Exploration Technologies, or SpaceX. It is
an automomous spacecraft that will deliver to and return payloads
and crew from the International Space Station. It will ride on Falcon
rockets also built by SpaceX. The Falcon is a family of rockets to
meet different mission requirements. The Falcon Heavy is expected to
be able to lift 53,000 kilograms to low-Earth orbit, making it the most
powerful U.S. rocket after NASA’s SLS rockets.

Dream Chaser
Sierra Nevada Corporation is working with NASA to develop a
commercial spacecraft for transporting crew and cargo to and
from the ISS. At first look, the spacecraft called the Dream Chaser,
appears to be a small space shuttle but it is really a lifting body.
It’s shape is based on NASA’s HL-20. Lifting bodies are aircraft
with minimal or no wings that get their lift from the shape of their
fuselage. Shaped something like a boat, the Dream Chaser will
be launched at the top of a rocket (in place of a nose cone), carry
up to seven people to the ISS, and will land back on Earth as an
airplane. Dream Chaser is expected to be a safe, reliable, and cost
effective way of transporting crew to low-Earth orbit.

Space Tourism
On October 4, 2004, SpaceShipOne, became the first private
space vehicle to climb above an altitude of 100 kilometers (62
miles) twice in a fourteen-day period. Air launched by a mother
ship, SpaceShipOne crossed the acknowledged boundary
of Earth’s atmosphere and space. Virgin Galactic is offering
suborbital flights to tourists and to researchers. SpaceShipTwo
flights will originate from Spaceport America, located in southern
New Mexico. Soon, spaceflight will belong to all.
11
 And Beyond?
Beginning more than 2,000 years ago, rockets evolved from toys into
complex machines capable of amazing flights. Rockets are still
the only means of travel to and through space. Their evolution
depended upon discovery, necessity, and experimentation.
The development of rockets did not move in a straight
line. Ideas and experiments founded only in fantasy
and not in science and mathematics often failed,
but rocketeers gradually learned. Spurring
them on were dreamers and doers like Jules
Verne, Konstantin Tsiolkovsky, Robert
Goddard, Gene Roddenberry, and
Neil Armstrong. They plotted the
course to the future through “Those three men,”
words, inventions, and said he, “have carried
accomplishments. into space all the resources
of art, science, and industry.
With that, one can do anything...”
Jules Verne’s, “From
Earth to the Moon.”

“The Earth is the cradle of humanity, but one

cannot live in the cradle forever.”
From a letter written by Tsiolkovsky, in 1911.

“It is difficult to say what is impossible, for the dream

of yesterday is the hope of today and the reality of
tomorrow.”
Goddard’s high school graduation oration,
“On Taking Things for Granted”, June 1904.

“...to seek out new life, new civilizations. To boldly go where no man has
gone before.”
Star Trek television series opening theme.

“ That’s one step for (a) man; one giant leap for mankind.”
Neil Armstrong on the Moon.

Who will be the dreamers and doers of tomorrow? Where will they take us?
12
What Comes An entire generation grew up with the space
shuttle. Under development for most of the

Next
1970s, the space shuttle Columbia made its
maiden flight on April 12, 1981. By the time of
its retirement in 2011, the space shuttle flew
135 missions and carried more astronauts
into space than all other rockets combined.
It deployed satellites, sent space probes
throughout the solar system, and carried
science laboratories and many of the major
components of the ISS.
The space shuttle was a complex and
versatile space launch system and its flights
ended when the ISS was fully assembled. What
comes next?
In the decades of exploration that
followed its creation in 1958, NASA expanded
our perspective of the universe and humanity’s
place within it. Many important lessons have
been learned, some of them the hard way. It is
now time to advance our ability to travel and
live in space. Once again, NASA will forge a
new era of space exploration.

NASA’s advanced SLS rocket will stand 122 meters (400 feet) tall, with a lift capacity of 130 metric tons
(286,000 pounds). Here it is shown configured to carry cargo.
13
 change all that. It will enable astronauts to travel
Strategic Goals: 2011-2012 Era to the International Space Station, to all points
NASA has identified six strategic goals that between the Earth and the Moon, to Mars, and
squarely focuses its efforts on exploration. to the asteroids.
1: Extend and sustain human activities across NASA’s Space Launch System Program
the solar system. has five primary objectives or “stepping stones”
2: Expand scientific understanding of the Earth that will lead us into the solar system. These
and the universe in which we live. objectives evolve through increasingly complex
3: Create the innovative new space and daring missions from the realm of space we
technologies for our exploration, science, and know to the realm of space where only robotic
economic future. spacecraft have gone before.
4: Advance aeronautics research for societal The initial objective replaces the space
benefit. shuttle with a versatile vehicle that resembles
5: Enable program and institutional capabilities a cross between the mighty Saturn V and the
to conduct NASA’s aeronautic and space space shuttle. It will loft the multi-purpose
activities. Orion. It is called multi-purpose because it will
6: Share NASA with the public, educators, serve astronaut crew needs in low-Earth orbit
and students to provide opportunities to and in missions out to the Moon and beyond.
participate in our Mission, foster innovation, With the successful first step
and contribute to a strong national economy. accomplished, astronaut crews will next be able
to expand their reach into cislunar space and to
In a few years, space travelers will the surface of the Moon itself. Cis-lunar space
embark on a wide range of space missions is the volume of outer space between low-Earth
near Earth and into the solar system. A new orbit and the Moon.
NASA rocket will take them there. NASA’s new The third step carries astronauts beyond
SLS rocket will take them there, in the process the Moon into interplanetary space and to the
joining a family of new rockets, some developed near-Earth asteroids. The fourth step takes
by private industry for commercial space crews to low-gravity bodies such as the moons
transportation involving cargo, astronauts, and of Mars. The fifth step will take crews to the
tourists. Space will no longer be just the realm surface of Mars and beyond.
of highly trained astronauts.
Yet NASA’s SLS rocket is the most The New Rockets
ambitious effort of them all. A modular heavy- Designed for great flexibility to serve crew
lift launch vehicle that can be configured in and cargo missions in a safe, affordable, and
different ways for different missions, the SLS sustainable manner, the SLS rocket will be the
rocket will carry astronauts into orbit, as well as
biggest and most capable launch vehicle ever
massive payloads destined for distant places. Itbuilt. This is a tall order, and tall it will be. In
will be tested during a series of launches from fact, staggering comparisons are required just
2017 to 2021. Then an advanced SLS rocket to describe it!
will take flight, thanks to the best ideas and The advanced SLS rocket – when
technology of the past, present, and future. configured to carry cargo –will be almost as tall
as a 40-story building. It will:
Destinations in Space • Produce 20% more thrust at liftoff than the
In spite of its great capabilities, the space Saturn V rocket that went to Earth’s moon.
shuttle was limited to low-Earth orbit, no more • Generate horsepower equivalent to that
than 560 kilometers (about 350 miles) above produced by 17,400 locomotive engines.
Earth. Only the Saturn V rocket of the late • Provide enough cargo room to carry nine
1960s and early 1970s carried astronauts higher school buses. The space shuttle could only
- all the way to the Moon. The SLS rocket will carry the equivalent of a bit less than two
14
The SLS rocket is modular so that it can be configured in different ways for different missions. NASA is
now planning two configurations, each stacked around a common SLS core stage equipped with RS-
25 engines and flanked on either side with either solid or liquid rocket boosters. These configurations
share many other elements and subsystems, as well – such as engines that use liquid oxygen and
liquid hydrogen as fuel – so that each costs less to design, build, and launch, without sacrificing the
performance required to get the job done. What will they do?
• One configuration is designed to carry people. Its stack is crowned with the Orion spacecraft, which
is larger than the Apollo capsule but otherwise looks similar to it. This configuration also has a rocket
tower on top, designed to help the crew escape in case of emergency.
• The other configuration is designed to carry massive amounts of cargo, such as structures,
equipment, scientific experiments, and supplies. Its stack includes a fairing enclosure that is placed
over the rocket’s nose to protect the payload.
15
 When configured to carry a crew, the
SLS rocket is capped with a sloping interstage
that tapers the rocket body diameter to match
that of the Orion spacecraft, which looks a bit
like the Apollo capsule that went to the moon.
However, the Orion spacecraft is larger and can
carry more crew and supplies. It is covered with
a protective shroud terminated with a pencil–
shaped escape rocket system, similar to one
that was originally developed, but never used,
for the Mercury and Apollo missions. In an
emergency, this enhanced escape system will
separate the Orion spacecraft from the rocket
and parachute it to safety along with its crew.
When configured to carry cargo, the SLS
rocket is fitted with an upper stage (instead of
the Orion spacecraft and interstage) that carries
large payloads into Earth orbit and on to deep
space. The upper stage also contains liquid
hydrogen and liquid oxygen as fuel for its J-2X
engines. Once part of the Saturn V rocket, these
engines have been upgraded and improved to
produce power equivalent to that of two Hoover
Dams.

Ready to launch, the Orion spacecraft sits on top of

the SLS crew configuration rocket. The large core
stage is straddled by two solid rocket boosters. An
escape rocket sits on top of the shroud covering
Orion.

The heart of the SLS rocket is a core

stage approximately the size of the combined
first and second stages of a Saturn V rocket. It
is a cylinder about 35 feet in diameter and 220
feet tall. (Specific dimensions may change as
the SLS rocket continues to evolve. Visit www.
nasa.gov/sls to keep up with new developments
as they happen.)
The lower end of the core stage will
feature a cluster of four or five RS-25 rocket
engines. These are the same engines that
powered space shuttle orbiters. Each burn
liquid hydrogen and liquid oxygen propellants
Test firing of a space shuttle RS-25 engine on a
that are contained in tanks within the core
static test stand at the Stennis Space Center in
stage. At full throttle, the power put out by Mississippi. During space shuttle flights, these
five engines will equal the power output of 12 engines generated almost 2.25 million newtons
Hoover Dams. (500,000 pounds) of thrust in a vacuum.
16
 Orion spacecraft.

maneuver their Orion spacecraft to rendezvous

The J-2X rocket engine is the culmination of 50 and dock with the payload.
years of rocket engine research and flight. The J-2 Much work remains to be done, but
was originally used for Satrun Moon rockets. This combining proven ideas and hardware with
modern engine will produce 1.33 million newtons the newest technologies will result in a highly
(300,000 pounds of thrust) in a vacuum. versatile, cost-effective, and sustainable
rocket that will carry astronauts and payloads
into space well into the future. Twelfth NASA
When configured for cargo, the SLS Administrator Charles F. Bolden, Jr. put it this
rocket is capped with its payload fairing, which way. “The next chapter of America’s space
is a protective shell that encloses large cargo, exploration story is being written, right here,
such as assembly modules for a deep-space right now...tomorrow’s explorers will now dream
mission to an asteroid or Mars. The payload of one day walking on Mars.”
fairing opens when it reaches orbit, exposing
the cargo. A crew then retrieves it after they

Static firing of the Orion escape rocket. Artist Concept of Orion arriving at Mars.

17
Orbit, Moon, Mars,
Asteroids and All Points
Between and Beyond
NASA’s SLS heavy-lift rocket is
being developed alongside many
commercial rockets and spacecraft
to open the solar system for
exploration. All points are possible.
The many benefits to be gained
from this endeavor are still coming
into view, but one thing is clear. The
SLS rocket is bringing advanced
capabilities within reach at last,
inspiring the next generation of
scientists, technicians, engineers,
and mathematicians – students in
today’s classrooms – to greatness.

Potential Benefits
Geosynchronous-Earth Orbit/Lagrange Points
• New microgravity destinations
• Space construction, fueling, repair
• Space telescopes and Earth observatories

The Moon
• Witness to the birth of Earth and the inner planets
• Critical resources

Mars/Phobos/Deimos
• Life beyond Earth?
• Permanent base

Near-Earth Asteroids
• How did the solar system form?
• Where did Earth’s water and organics come from?
• Planetary defense - threat of impacts
• Space resources

18
How Rockets
Whether flying a small model rocket or
launching a giant cargo rocket to Mars, the
principles of how rockets work are exactly

Work
the same. Understanding and applying these
principles means mission success.
In the early days of rocketry, the flight of
a fire arrow or other rocket device was largely
a matter of chance. It might fly; it might skitter
about, shooting sparks and smoke; or it might
explode. Through centuries of trial and error,
rockets became more reliable. However, real
advancements in rocketry depended upon a
scientific and mathematical understanding of
motion. That came in the seventeenth century
with the works of scientists such as Galileo and
Isaac Newton.
Galileo conducted a wide range of
experiments involving motion. Through studies
of inclined planes, Galileo concluded that
moving objects did not need the continuous
application of force (in the absence of friction
and drag) to keep moving. Galileo discovered
the principle of inertia, that all matter, because
of its mass, resists changes in motion. The
more mass, the more resistance.
Isaac Newton, born the year Galileo
died, advanced Galileo’s discoveries and those
of others by proposing three basic laws of
motion. These laws are the foundation of all
rocket science. Understand the laws and you
know just about everything you need to build
successful rockets. Apply the laws and you
become a “rocket scientist.”

Newton’s Laws of Motion

In his master work entitled Philosophia Naturalis
Principia Mathematica (usually referred to as
Principia), Isaac Newton stated his laws of
motion. For the most part, the laws were known
intuitively by rocketeers, but their statement
in clear form elevated rocketry to a science.
Practical application of Newton’s laws makes
the difference between failure and success.
The laws relate force and direction to all forms
of motion.

19
In simple language, Newton’s Laws of Reach over and pick up the cup. In doing so,
Motion: you unbalance the forces on the cup. The
weight you feel is the force of gravity acting on
First Law the mass of the cup. To move the cup upward,
Objects at rest remain at rest and objects in you have to exert a force greater than the force
motion remain in motion in a straight of gravity. If you hold the cup steady, the force
line unless acted upon by an of gravity and the muscle force you are exerting
unbalanced force. are in balance.

Second Law
Force equals mass times acceleration
(or f = ma).

Third Law
For every action there is an equal and
opposite reaction.

Before looking at each of these laws in detail, a Unbalanced force

few terms should be explained.

Rest and Motion, as they are used in the

first law, can be confusing. Both terms are
relative. They mean rest or motion in relation
to surroundings. You are at rest when sitting
in a chair. It doesn’t matter if the chair is in the Balanced
cabin of a jet plane on a cross-country flight. forces
You are still considered to be at rest because
the airplane cabin is moving along with you. If
you get up from your seat on the airplane and
walk down the aisle, you are in relative motion
Unbalanced force also refers to other
because you are changing your position inside
motions. The forces on a soccer ball at rest on
the cabin.
the playing field are balanced. Give the ball a
good kick, and the forces become unbalanced.
Force is a push or a pull exerted on an Gradually, air drag (a force) slows the ball, and
object. Force can be exerted in many ways, gravity causes it to bounce on the field. When
such as muscle power, movement of air, and the ball stops bouncing and rolling, the forces
electromagnetism, to name a few. In the case are in balance again.
of rockets, force is usually exerted by burning Take the soccer ball into deep space,
rocket propellants that expand explosively. far away from any star or other significant
gravitational field, and give it a kick. The kick
Unbalanced Force refers to the sum total or is an unbalanced force exerted on the ball that
net force exerted on an object. The forces on a gets it moving. Once the ball is no longer in
coffee cup sitting on a desk, for example, are in contact with the foot, the forces on the ball
balance. Gravity is exerting a downward force become balanced again, and the ball will travel
on the cup. At the same time, the structure of in a straight line forever.
the desk exerts an upward force, preventing the How can you tell if forces are balanced
cup from falling. The two forces are in balance. or unbalanced? If the soccer ball is at rest,
20
 Balanced
Force

Top view of two riders on a carousel. The carousel

Unbalanced platform exerts unbalanced forces on the riders,
Force preventing them from going in straight lines.
Instead, the platform continually accelerates the
riders in a counterclockwise direction.
the forces are balanced. If the ball is moving
This is what happens on a carousel. Even
at a constant speed and in a straight line, the
though the carousel is turning at a constant
forces are balanced. If the ball is accelerating
rate, the continual change in direction of
or changing its direction, the forces are
the horses and riders (circular motion) is an
unbalanced.
acceleration.

Mass is the amount of matter contained in

Action is the result of a force. A cannon fires,
an object. The object does not have to be
and the cannon ball flies through the air. The
solid. It could be the amount of air contained
movement of the cannon ball is an action.
in a balloon or the amount of water in a
Release air from an inflated balloon. The air
glass. The important thing about mass is that
shoots out the nozzle. That is also an action.
unless you alter it in some way, it remains the
Step off a boat onto a pier. That, too, is an
same whether the object is on Earth, in Earth
action.
orbit, or on the Moon. Mass just refers to the
quantity of matter contained in the object.
(Mass and weight are often confused. They are Reaction is related to action. When the
not the same thing. Weight is a force and is cannon fires, and the cannon ball flies through
the product of mass times the acceleration of the air, the cannon itself recoils backward.
gravity.) That is a reaction. When the air rushes out of
the balloon, the balloon shoots the other way,
another reaction. Stepping off a boat onto to
Acceleration relates to motion. It means
a pier causes a reaction. Unless the boat is
a change in motion. Usually, change refers
held in some way, it moves in the opposite
to increasing speed, like what occurs when
direction. (Note: The boat example is a great
you step on the accelerator pedal of a car.
demonstration of the action/reaction principle,
Acceleration also means changing direction.
providing you are not the one stepping off the
boat!)

Newton’s First Law

This law is sometimes referred to as Galileo’s
law of inertia because Galileo discovered the
principle of inertia. This law simply points
21
out that an object at rest, such as a rocket It would appear that
on a launch pad, needs the exertion of an something is wrong
unbalanced force to cause it to lift off. The here if the action and
amount of the thrust (force) produced by reaction are supposed
the rocket engines has to be greater than to be equal. They are
the force of gravity holding it down. As long equal, but the mass of
as the thrust of the engines continues, the the gas, smoke, and
rocket accelerates. When the rocket runs out flames being propelled
of propellant, the forces become unbalanced by the engine is
again. This time, gravity takes over and causes much less than the
the rocket to fall back to Earth. Following its mass of the rocket
“landing,” the rocket is at rest again, and the being propelled in the
forces are in balance. opposite direction.
There is one very interesting part of Even though the force
this law that has enormous implications for is equal on both, the
spaceflight. When a rocket reaches space, effects are different.
atmospheric drag (friction) is greatly reduced Newton’s first law, the
or eliminated. Within the atmosphere, drag is law of inertia, explains
an important unbalancing force. That force is why. The law states
virtually absent in space. A rocket traveling that it takes a force to
away from Earth at a speed greater than 11.186 change the motion of
kilometers per second (6.95 miles per second) an object. The greater
or 40,270 kilometers per hour (25,023 mph) the mass, the greater
will eventually escape Earth’s gravity. It will the force required to
slow down, but Earth’s gravity will never slow it move it.
down enough to cause it to fall back to Earth.
Ultimately, the rocket (actually its payload) Newton’s Second Law
will travel to the stars. No additional rocket The second law relates force, acceleration, and
thrust will be needed. Its inertia will cause it to mass. The law is often written as the equation:
continue to travel outward. Four spacecraft are
actually doing that as you read this. Pioneers 10
and 11 and Voyagers 1 and 2 are on journeys to
f = ma
the stars!
The force or thrust produced by a rocket
engine is directly proportional to the mass of
Newton’s Third Law
the gas and particles produced by burning
(It is useful to jump to the third law and come
rocket propellant times the acceleration of
back to the second law later.) This is the law
those combustion products out the back of the
of motion with which many people are familiar.
engine. This law only applies to what is actually
It is the principle of action and reaction. In
traveling out of the engine at the moment and
the case of rockets, the action is the force
not the mass of the rocket propellant contained
produced by the expulsion of gas, smoke, and
in the rocket that will be consumed later.
flames from the nozzle end of a rocket engine.
The implication of this law for rocketry
The reaction force propels the rocket in the
is that the more propellant (m) you consume at
opposite direction.
any moment and the greater the acceleration (a)
When a rocket lifts off, the combustion
of the combustion products out of the nozzle,
products from the burning propellants
the greater the thrust (f).
accelerate rapidly out of the engine. The rocket,
on the other hand, slowly accelerates skyward.

22
A Taste of Real Rocket Science
Naturally, launching rockets into space is
more complicated than Newton’s laws of
f = mexitVexit
motion imply. Designing rockets that can
In real rocket science, many other things also
actually lift off Earth and reach orbital velocities
come into play.
or interplanetary space is an extremely
complicated process. Newton’s laws are
• Even with a low acceleration, the rocket will
the beginning, but many other things come
gain speed over time because acceleration
into play. For example, air pressure plays an
accumulates.
important role while the rocket is still in the
atmosphere. The internal pressure produced
• Not all rocket propellants are alike. Some
by burning rocket propellants inside the rocket
produce much greater thrust than others
engine combustion chamber has to be greater
because of their burning rate and mass. It
than the outside pressure to escape through
would seem obvious that rocket scientists
the engine nozzle. In a sense, the outside
would always choose the more energetic
air is like a cork in the engine. It takes some
propellants. Not so. Each choice a rocket
of the pressure generated inside the engine
scientist makes comes with a cost. Liquid
just to exceed the ambient outside pressure.
hydrogen and liquid oxygen are very
Consequently, the velocity of combustion
energetic when burned, but they both have
products passing through the opening or
to be kept chilled to very low temperatures.
throat of the nozzle is reduced. The good news
Furthermore, their mass is low, and very
is that as the rocket climbs into space, the
big tanks are needed to contain enough
ambient pressure becomes less and less as
propellant to do the job.
the atmosphere thins and the engine thrust
increases.
In Conclusion...
Another important factor is the changing
Newton’s laws of motion explain just about
mass of the rocket. As the rocket is gaining
everything you need to know to become a
thrust as it accelerates upward due to outside
rocket scientist. However, knowing the laws is
pressure changes, it is also getting a boost
not enough. You have to know how to apply
due to its changing mass. Every bit of rocket
them, such as:
propellant burned has mass. As the combustion
products are ejected by the engine, the total
- How can you create enough thrust to
mass of the vehicle lessens. As it does its
exceed the weight of the rocket?
inertia, or resistance to change in motion,
- What structural materials and propellant
becomes less. As a result, upward acceleration
combinations should you use?
of the rocket increases.
- How big will the rocket have to be?
- How can you make the rocket go where
In practical terms, Newton’s second law can be
you want it to?
rewritten as this:
- How can you bring it back to Earth
safely?
f = mexitVexit + (pexit - pambient)Aexit

(“A” refers to the area of the engine throat.)

When the rocket reaches space, and the exit

pressure minus the ambient pressure becomes
zero, the equation becomes:
23
Applying The next step in becoming a rocket scientist
is to apply rocket science and mathematics

Newton’s
to the design and construction of actual
rockets. There are many tricks of the trade for
maximizing thrust and reducing rocket mass.

Laws
Each of these tricks is an application of one
or more of Newton’s laws. Although there are
many different kinds of rockets, the same laws
apply to all.
Rockets are generally classified as either
solid or liquid. They produce thrust by burning
propellants and expelling the combustion
products out of the engine. Propellants are
simply a combination of fuel and oxidizer. The
oxidizer for solid propellants is a chemical
containing oxygen. For example, gunpowder,
used in the engines of model rockets, contains
potassium nitrate (KNO3). Potassium nitrate
provides the oxygen needed for the other
gunpowder chemicals to burn rapidly. The
oxidizer for liquid rockets is usually pure oxygen
chilled to 90 K (-183oC or -297.3oF) so that it
condenses into liquid oxygen (LOX).
The propellants for rockets are held in
tanks or within cases. This is both an advantage
and a disadvantage. Because they carry their
propellants (oxygen onboard), rockets can work
in space. No other presently available vehicle
can do that. A jet engine cannot function in
space because it is an “air-breather.” Although
jets and rockets both employ Newton’s law of
action and reaction, the jet needs to draw in air
from the atmosphere to burn its fuel. This limits
the altitude of a jet plane.

Solid Propellant Rockets

The first true rockets, “fire arrows” invented by
the Chinese, employed solid propellants. An
early form of gunpowder was packed into a
cylinder closed off at one end. On the other
end was an opening. When the gunpowder
was ignited, it burned very quickly and
created great quantities of gas and other
combustion products that rushed out of the
hole. This produced thrust. Flight control was
accomplished by attaching a long stick to
the rocket to create drag as the rocket sailed
through the air. This wasn’t a very accurate

24
 to accelerate
greatly as they
race to the outside
(second law). The
nozzle aims the
exhaust straight
downward so that
the rocket travels
straight upward
(third law).
To
appreciate how
the throat of the
rocket accelerates
the combustion
products, turn
on the water for
Four-stage, solid propellant Scout rocket. a garden hose.
Open the nozzle to
the widest setting.
system, but the rocket usually flew in the
Water slowly flows
intended direction.
out. Next, reduce
More than 1,000 years later, solid
the opening of
propellant rockets are not appreciably different the nozzle. Water
from the Chinese fire arrows. The solid rocket quickly shoots out Solid Propellant Rocket
boosters (SRBs) for the space shuttle are in a long stream
very large tubes packed with propellants that (second law) and
are closed off at one end and have a hole the hose pushes back on you (third law).
at the other. The SRBs do have many other The propellant in solid rockets is packed
sophisticated innovations, but, in principle, they
inside the insulated case. It can be packed
are no different from their primitive ancestors. as a solid mass or it may have a hollow core.
Solid propellant rockets have a simple
When packed as a solid mass, the propellant
design. They consist of a case or tube in which
burns from the lower end to the upper end.
the propellants are packed. Early rockets used
Depending upon the size of the rocket, this
cases made of paper, leather, and iron. Modern
could take a while.
rockets use a thin and lightweight metal such
With a hollow core,
as aluminum. Making the case from thin metal
the propellants burn
reduces the overall weight of the structure and
much more rapidly
increases flight performance. However, the heat
because the entire face
from the burning propellants could easily melt
of the core is ignited
through the metal. To prevent this, the inner
at one time. Rather
walls of the case have to be insulated.
than burning from one
The upper end of the rocket is closed off
end to the other, the
and capped with a payload section or recovery propellant burns from
parachutes. The lower end of the rocket is the core outward,
constricted with a narrow opening called the
throat, above a larger cone-shaped structure,
called the nozzle. By constricting the opening, End-burning and hollow
the throat causes the combustion products core rockets.
25
towards the case. The advantage of a hollow The fuel and oxidizer
core is that the propellant mass burns faster, mix as they are
increasing thrust (second law). sprayed into the
To make solid rockets even more chamber. There
powerful, the core doesn’t have to be round. It they ignite, creating
can have other shapes that increase the surface huge quantities of
area available for burning. The upper ends of combustion products
the space shuttle SRBs had star-shaped cores. that shoot through
When ignited, the large surface area of the the throat and are
star points boosted liftoff thrust. In about one focused downward
minute, however, the points burned off, and the by the nozzle.
thrust diminished somewhat. This was done (Remember how the
on purpose because the space shuttle begins laws control this!)
accelerating through the sound barrier. Passing Liquid
through causes vibrations that are diminished propellant engines
by the temporary thrust reduction of the SRBs have a number of
(second law). advantages over
Solid propellant rockets have two other solid propellant
major systems at work. One is the control engines. A wider
system, which will be discussed later. The other array of propellant
is the igniter. combinations are
The Chinese fire arrows were ignited with available for different
fuses. This was a dangerous practice because applications. Some
the fuse could burn too quickly and not give of these require
the rocketeer time to get out of the way. Fuses an ignition system Liquid propellant rocket
were used for centuries until they were replaced and others simply
by electric ignition. With an electric system, a ignite on contact. Monomylmethylhydrozene
wire with high resistance heats and ignites the (fuel) and nitrogen tetroxide (oxidizer) ignite
propellant. spontaneously. These are called hypergolic
The space shuttle’s SRBs and the SRBs propellants. With hypergolic propellants, a
that will be used for the new SLS rockets have rocket engine does not need an ignition system.
a more dynamic ignition system. A small rocket Hypergolic
motor is mounted inside the upper end of the propellants
core. When it ignites, it shoots a long tongue of are great for
flame down the core to ignite the entire surface attitude control
at once. This cause the SRBs to reach full thrust rockets like
in less than one second. those that will
be arrayed
Liquid Propellant Rockets around the
Liquid propellant rockets are an invention Orion service
of the twentieth century. They are far more module.
complex than solid rockets. Generally, a liquid Another
rocket has two large tanks within its body. advantage
One tank contains a fuel, such as kerosene or of liquid
liquid hydrogen. The other tank contains liquid propellants is
oxygen. that they can
When the liquid rocket engine is fired, be controlled.
high-speed pumps force the propellants into a Adjusting their
RS-68 Liquid propellant engine
cylindrical or spherical combustion chamber. flow into the test firing.
26
combustion chamber adjusts the amount of the nozzle. Normally, the nozzle is very thick
thrust produced. Furthermore, liquid engines and heavy, to prevent it from eroding away
can be stopped and restarted later. It is very in the high-temperature streams of exhaust
difficult to stop a solid propellant rocket once it gases. A thin-wall nozzle needs a cooling
is started, and thrust control is limited. system. Small tubes lace the walls and carry
Naturally, with any technology, there is liquid hydrogen. Hydrogen becomes a liquid
a price to pay. The engine of a liquid propellant at 20.27 K (-252.87oC or -423.17oF). The super
rocket is very complex and subject to failure. It cold hydrogen absorbs the heat from the gas
also has more structural mass than comparable stream and protects the walls of the nozzle.
solid propellant rockets. One method for mass The hydrogen, now heated, is then injected into
reduction is to use thin, lightweight metal for the combustion chamber. With this system, the
engine has less mass and produces greater
thrust (second law again!).

Controlling Flight
Newton’s third law gets a workout in the control
systems for rockets. Launch rods for old
rockets were ineffective. Military rockets were
launched by the thousands so that at least a
few would hit their targets. Accuracy improved
when small vanes were added to the exhaust
stream. The vanes imparted stability by causing
the rockets to spiral like bullets.
Another technique was to add fins, like
the feathers on an arrow, to the lower end of the
rocket case. As long as a rocket flies “straight
as an arrow,” the fins provide little drag or
friction with the air. However, if the engine end
of the rocket begins “fishtailing,” drag increases
greatly. The air stream strikes the fin, and the
fin directs the stream to the side. The lower
end of the rocket moves the opposite way and
corrects the fishtailing (Newton’s third law). Fins
are used extensively with model rockets and
small missiles.
Rocket fins on model rockets are a
passive system for flight control. They remain
fixed and do their job if the rocket starts going
astray. Robert Goddard took fins a giant step
forward by turning them into an active system.
Goddard’s fins could be made smaller (and
lighter!) because they were not fixed. Even a
slight straying from the planned course would
cause the fins to react and tilt slightly in the
appropriate direction.
The full stack of the Orion spacecraft is shown. An The heart of Goddard’s control system,
aeroshell surrounds the capsule for liftoff. On top
later used in the V2 and other advanced
is the escape rocket system. Several of Orion’s
rockets, was a gyroscope. Gyroscopes, which
attitude control rockets are seen around the service
module. are a kind of top, spin at high speeds and
27
become stable due to their inertia (first law). In canards, and they permit rapid and extreme
other words, the axis of the gyroscope points in control maneuvers for air-to-air military missiles.
one direction. If the rocket veers from course, Small fins, called vanes, may be placed within
the movement acts on the alignment of the the exhaust stream of the engine. When a vane
gyroscope, and a linkage or an electrical system tilts, it directs part of the exhaust to one side or
connected to the gyroscope transmits the another. The lower end of the rocket responds
appropriate corrections to the movable rocket by moving the other way. All of these fin styles
fins. are examples of Newton’s third law in action.
You can get an idea of the effectiveness Another way the third law is applied for
of movable fins with a simple demonstration. controlling flight is through gimballed engine
Balance the end of a long stick on the palm of nozzles. Gimballed means the nozzle can tilt in
your hand. If the stick starts tilting to the right, different directions. Movements of the nozzle
you automatically move your hand to the right can steer the rocket on a new course or make
to straighten up the stick. Movable fins do the course corrections. The solid rocket boosters
same thing. The rocket starts tilting to the that will be used for the SLS rockets will use
gimballing for control.

Controlling Mass
The total mass of a rocket has a major influence
on its performance. If the rocket has a greater
mass than the engines are capable of lifting, the
rocket remains stuck on Earth (first law). The
lighter the rocket, the better. However, since
the rocket must carry all of its propellants (there
aren’t any filling stations in space —YET!),
a big part of the rocket’s mass has to be its
propellants. The mass of the propellants burned
is a big part of thrust (second law). Mass
savings have to come from elsewhere — the
rocket structure.
Engineering rocket tanks out of
lightweight materials strengthened by ribs is a
great way of saving mass. Chilling hydrogen
and oxygen propellants until they liquefy
reduces their total volume. That means smaller,
less massive tanks can be used. Gimbaling
engines for control means that heavy fins can
right. The leading edge of the fins bend to be eliminated.
the right. This causes the air stream to be When designing new rockets, rocket
deflected to the left. The lower end of the rocket scientists (and engineers) concern themselves
moves to the right, and the rocket is back on with mass fraction. Mass fraction is a simple
course. inverse mathematical relationship between the
Naturally, some fins are more mass of the propellants of the rocket and the
complicated than just described. Depending total mass of the rocket. Although there is
upon the rocket design, the entire fin may
mass (propellant)
not move. Instead, a lower flap might be the MF =
controllable part of the fin (kind of like a rudder).
mass (total rocket)
Very small movable fins might also be placed
towards the nose of the rocket. These are called
28
wiggle room in this equation,
the most efficient rockets have
mass fractions of about 0.91.
That means that of the total
rocket, propellant accounts
for 91% of its mass. The
rocket structure and payload
comprises the other 9%. Since
you need the mass of the
propellants, efforts on saving
mass are primarily focused on
structure and payload.
One simple but old trick
is staging. Begin with a large
rocket, stack a smaller one on Proposed nuclear thermal rocket engine
top of it, stack a still smaller
rocket on top of the second small, about the force needed to push a walnut
one, and then the payload on across a table. One would think, “Why bother?”
top of the third rocket. The large The answer is that ion drive can function
rocket lifts its own mass and the continuously for months or years on end. It may
mass of the other two. When start off slow, but after months and months
the large rocket (first stage) is of thrusting a vehicle could achieve velocities
empty, it drops off. The second rocket (second higher than a chemical rocket that burns
stage) fires and accelerates itself and the third all its propellants in a few minutes. Another
stage with its payload to higher speeds and thing — the electricity for ion drives can come
altitudes. When it is empty, the second stage is from sunlight captured by solar panels on the
dropped, and the third stage finishes the job of spacecraft.
delivering the payload. By staging, the mass of Nuclear power is also under
the rocket is reduced in flight, making the upper consideration for rocket propulsion. An onboard
stages more efficient in doing their jobs. nuclear reactor would generate lots of heat
through nuclear fission (breaking down of
Future Rockets radioactive atoms). A supply of hydrogen gas
Part of the fun of rocket science is that there would be heated by the reactor, causing the
are always new ideas and new ways of doing gas molecules to expand rapidly and stream
things. Solid and liquid rockets are not the out of the engine nozzle. No burning would
only way to go. Other kinds of rockets are “on be involved. Think of this kind of rocket as a
the drawing board,” going through prototype nuclear-powered balloon.
testing, or churning about in the imaginations of Still another concept is beaming a
dreamers. powerful laser from Earth towards collectors
Electric rockets have been around since on a spacecraft. The energy received would
the 1960s. Rather than burning propellants, be used to heat a supply of gas for propulsion.
ions — electrically charged atoms — are driven In this way, the nuclear reactor could be
out of the rocket engine using magnetic forces. eliminated.
In doing so, a very small thrust is imparted Still further in the future, matter/
to the rocket. (Newton’s laws are still at work antimatter drives, such as those proposed in
in this rocket.) Electric rockets, sometimes Star Trek, might actually be possible.
referred to as “ion drive,” are very efficient in Where we go and how we will get there
converting electrical energy into thrust, but all comes down to the rocket scientists of the
since the mass of ions is very low, the thrust is future, who are sitting in classrooms today.
29
Rocket There are few classroom topics that generate
as much excitement as rockets. The scientific,

Activities
technological, engineering, and mathematical
(STEM) foundations of rocketry provide exciting
classroom opportunities for authentic hands-
on, minds-on experimentation. The activities
and demonstrations that follow are suitable for
students at many grade levels.
For the most part, material and tool
requirements are simple, but a few of the bigger
projects require launch platforms that need
to be constructed or purchased in advance.
Although purchasing platforms from school
science catalogs and specialty companies is
an option, constructing your own is a learning
process in which you can involve your students.
Minimal proficiency with tools (saw, screw
driver) is required. Detailed instructions (with
lots of illustrations!) are provided.
As you review the activities you will
notice that each supports state and national
educational standards for science, technology,
and mathematics. A matrix identifying specific
national standards and recommended grade
levels follow on the next two pages. You may
“cherry-pick” activities, but linking several
or using all of the activities will provide your
students with a memorable and beneficial
STEM unit and turn your students into “rocket
scientists.” You Are Go For Launch!

A Note about Measurement

Where possible, all measurements used in the
activities are metric. However, English units
are often employed when constructing devices
because most materials and parts are sized
with English measures.

30
 National Curriculum Standards
The rocket activities in this guide support national curriculum standards (current at the time of its
writing) for science, mathematics, and technology. The standards identified for each activity are
based on science standards developed by the National Research Council and the mathematics
standards developed by the National Council of Teachers of Mathematics. While not practical to
identify individual standards by state, national standards provide a guide for selecting activities
that meet local needs.

DISCONTINUED ____________
_________

31
DISCONTINUED ____________
_________

32
 Suggested Grade Levels
The matrix below displays suggested grade levels for the activities in this guide. Each activity
is appropriate for a wide range of student abilities. Although grade levels are suggested, small
modifications will enable activities to be used successfully with other grade levels. One area of
potential adjustment are the student pages. The reading level and vocabulary on these pages may
be below or above your students’ abilities. Many of the activities contain tips, suggestions, and
extensions that will assist you in preparing the lesson for the appropriate audience.

DISCONTINUED ____________
_________

33
 Rocket Activity

Pop Can
“Hero Engine”
Objective
To investigate Newton’s third law of motion
using thrust produced by falling water.

Description
Small student teams will construct water-
propelled engines out of soft drink cans and
investigate ways to increase the action-reaction
thrust produced by water shooting out of holes
punched in the can sides.

Materials
National Science Content Standards 4 empty aluminum soft drink cans per
Unifying Concepts and Processes team, with pull tabs intact
• Change, constancy, and measurement Carpenter’s nails of different sizes ( 6,12,
Science as Inquiry 16D, etc.)
• Abilities necessary to do scientific String (about 50 cm)
inquiry Water tub (large plastic storage tub, small
Physical Science kiddy pool, sink, etc.)
• Position and motion of objects Water
• Motions and forces Towels
Science and Technology Rulers
• Understanding about science and Stickers or bright permanent marker
technology

National Mathematics Content Standards

• Number and Operations Management
• Measurement Divide your students into small groups. Set up
• Data Analysis and Probability one or more water tubs around your classroom
and fill the tubs with about 20 cm of water.
National Mathematics Process Standards Have no more than one or two teams test their
• Reasoning and Proof engines at one time. Discuss the importance
• Communication of keeping the water in the tubs. When engines
• Connections are filled, they should not be raised any higher
• Representations than the rim of the tub. This will keep water
coming out of the holes from falling on the
surrounding floor. Be sure to recycle the cans
at the conclusion of the activity.

34
 near the top of the column. The water stream
Tip Ask students to bring undented and washed
soft drink cans from home. You will need at least
gets stronger the closer the hole is to the
three cans per student team. container bottom. Thrust stops when water
drains out to the level of the holes. Holes at
the bottom of the container produce thrust for
Background a longer time. However, the magnitude of the
This activity simulates the operation of the thrust diminishes as the water column lowers
classic aleoliphile engine invented by Hero (pressure drops with column height).
of Alexandria more than 2,000 years ago.
(See page 2.) Hero’s engine was a spinning
copper sphere that was propelled by a thrust The three holes in
this container each
produced by a jet of steam. The engine was
produce a water
an early demonstration of the action-reaction stream. Greater
principle (third law of motion) stated by Sir Isaac pressure at the
Newton 1,700 years later. (See page 4.) Steam, bottom makes the
shooting out through two L-shaped holes, stream shoot out
farther.
creates an action force that is accompanied
by an equal reaction force in the opposite
direction.
Hero’s invention was not self-contained
and therefore, not a true rocket device. Heat to
generate the steam had to be applied externally.
Rockets are completely self-contained.
In this activity, a Hero engine-like device
is created by the students. Holes are punched The effects of the other variables are
in the side of a soft drink can. The holes are many. For example, more holes means more
angled pinwheel fashion. A string, tied to water streams out of the can, but the water
the pull tab, supports the can and permits it drains from the can more quickly. Large holes
to rotate. The can is immersed in water and drain water more quickly than small holes.
pulled out. Gravity draws the water through the Holes angled in different directions counteract
angled holes, and streams shoot out in either each other. Holes that are not angled produce
a clockwise or counterclockwise direction. water streams that leave the can perpendicular
The streams produce an action force that is and no rotation occurs. (The object is to have
accompanied by a reaction force. The can students discover the effects of the different
spins in the opposite direction. variables themselves.)
There are many potential variables with
the Pop Can Hero engine. Hole size, hole Procedure Making the Pop Can “Hero
angle, number of holes, and the placement of Engine”
the hole above the base of the can all affect the 1. Divide your students into small teams of two
thrust produced. The most significant of these or three members.
variables is the hole placement. The greatest 2. Demonstrate the procedure for punching
thrust occurs when the holes are punched just holes in the cans. The idea is to punch the
above the bottom of the can. This is a gravity hole without crushing the can sides. Place
effect. The strength of the water stream (thrust) the nail point near the bottom rim of the can.
is based on the pressure. Water pressure in Apply pressure with the nail, turning it, if
a container is the greatest at the bottom. The necessary, to make the hole.
pressure at the top of the water in the container 3. When the hole is punched, push the nail head
is zero (ignoring air pressure in this example). to the right or to the left. This will angle the
Water dribbles out of a hole hole so that water will stream out on a
35
tangent to produce thrust.
4. Rotate the can 1/4 turn and punch a second
hole. Again angle the hole (in the same
direction as before).
5. Repeat the procedure two more times to
make four holes in total. (Cans may have
different numbers of holes.)
6. Tie a string to the pop tab.
7. Place a sticker or a dot with a permanent
marker near the top of the can. (The sticker
or dot helps students count the rotations.)
8. Immerse the can in the tub of water.
9. When the can is full of water, lift it out by the
string and observe the rotational motion.

Procedure Student Team Experiment

1. Provide each team with copies of the “Pop
Can Hero Engine” experiment sheet.
2. Review the instructions on the page
and discuss the objective. (“Design an COLA

experiment to find a way to increase the

number of rotations the Pop Can Hero
Engine makes.”)
3. Make a list of student ideas for variables
to test (hole size, number of holes, etc.). COLA
Discuss the importance of changing only one
thing at a time. The first Hero engine they
create will serve as the baseline experiment.
The second and third engines will vary just
one thing (e.g., Can 1 - medium size holes, Tip Make sure the nails used for punching
holes have good points on them. They do not
Can 2 - smaller holes, Can 3 - larger holes) have to be needle sharp, just not blunt.
5. Discuss ideas for keeping track of the
number of rotations the cans make. (Place a
in the can and causes it to stream out the
large bright mark on one side, etc.)
holes. The shape of the hole directs the
4. Give teams time to pick their experiment,
water streams. The diameter of the hole
devise their hypothesis, and write the
determines how fast the water streams out,
procedures they will follow on their
etc.
experiment page.
• Which of Newton’s laws of motion explains
5. Distribute the materials to the teams and
why the can rotates in the opposite direction
have them begin their investigation.
from the direction of the water streams?
Newton’s third law of motion
Discussion • Based on the results of the individual team
• What provides the force that causes the cans experiments, what could you do to maximize
to rotate? the number of rotations of the Pop Can Hero
Actually, there are a combination of factors Engines?
that contribute to the force that causes the Individual answers: combine best hole
cans to rotate. The most important is the size with the right number of holes, best
force of gravity. It attracts the water placement, etc.
36
Assessment grasp the ends, bend the tube ends into an L
• Ask teams to state their experiment shape. Be careful not to overheat or bend
hypotheses, explain their procedures, and too forcefully, or the tube may flatten on the
present their results. Make a list of the bend.
different ways one can increase the number of 5. Drill through the center of the threads for the
rotations the Hero engine makes. attachment point for the float arm. This will
• Have teams submit their completed data open a water-filling hole into the float.
sheet with their written conclusion based on 6. Drill a hole through the flat side of the thumb
their results. screw to permit tying of the string.
7. Pour about 30 milliliters of water (about 1
tablespoon) into the float through the filling
Extensions
hole.
• Construct an actual steam-powered hero
8. Thread the thumbscrew into the hole and
engine and use it as a demonstration device.
attach the string.
Although not difficult to construct, the engine
9. Suspend the engine from above and gently
will require some basic construction skills,
heat the bottom of the engine with a torch.
principally soldering. You will need the
Be sure to wear eye protection. When the
following materials:
water boils, steam will be produced that will
jet out of the two nozzles and propel the
- Copper toilet tank float (available from
engine.
plumbing supply stores and from on-line
plumbing supply stores - search “copper
toilet tank floats.”
- 12” copper tube, 3/16” diameter (from
hobby shops)
- Thumbscrew to fit threads for float arm
attachment
- Metal file
- 3/16” drill
- solder
- propane torch
- pliers
- string
- water
- eye protection

1. File a notch in the center of the tube. Do not

file all the way through. In Instruction 3, the
tube will be inserted completely through the
sphere. This supports the tube while it is
being soldered. (See diagram to the right.)
2. Drill 3/16th” holes through opposite sides of Filing produces an opening
the float just above the “equator” joint. in the tube through which the
3. Insert the tube through the holes. Lightly steam can pass.
heat the place where the tubes contact the
sphere. Touch solder to the contact point to
seal the tube to the float. Tip Before using your steam Hero engine, confirm the
4. Apply heat to soften the opposite ends of the tubes are not blocked by blowing through them. If air
comes out the opposite tube, the engine is safe to use.
tube until they bend easily. Using pliers to
37
38
39
 Rocket Activity

3...2...1...PUFF!
Objective
Students will learn about rocket stability as they
construct and fly small paper rockets.

Description
Students will construct small “indoor” paper
rockets, determine their flight stability, and
launch them by blowing air through a drinking
straw.
Materials
Sheet of 8.5 x 11 paper (white or colored)
Cellophane tape
Scissors
Ruler
Meter stick or tape measure
National Science Content Standards Fat, round pencil or dowel (see tips, p. 43)
Unifying Concepts and Processes Eye protection
• Evidence, models, and explanation Drinking straws
Science as Inquiry Copy of the SLS paper rocket plans
• Abilities necessary to do scientific
inquiry
Physical Science Management
• Position and motion of objects Hold on to the straws until students have
• Motions and forces completed their rockets and tested them for
Science and Technology stability. Select a clear space for the launches.
• Abilities of technological design Depending upon student lung power, rockets
may fly 7-10 meters. Be sure students wear
National Mathematics Content Standards eye protection. Although the rockets have little
• Number and Operations mass, pointed nose cones could injure eyes.
• Geometry Make sure students understand that the rockets
• Measurement are not to be launched toward anyone.
• Data Analysis and Probability
Background
National Mathematics Process Standards Rocket stability is an important issue for rocket
• Connections scientists. The success of a space launch
• Representations depends upon “pinpoint” accuracy. If a future
NASA Space Launch System rocket arrives
in space in the wrong orbit, it may not have
enough fuel or supplies to make rendezvousing
with the International Space Station or an
asteroid possible. The crew would have to
return to Earth and “chalk off” a failed mission.
40
 Stability means making sure the rocket In both examples, there was more
follows a smooth path in flight. If it wobbles, the surface area on one side of the COM than on
ride will be rough and extra fuel will be burned the other. Both devices were stable. Stability of
to get back on course. If it tumbles, it’s time to a rocket is the same thing.
push the destruct button! An unstable rocket is In this activity, students will build paper
dangerous. rockets and test them for stability using a drop
Fortunately, it is relatively easy to ensure test. Later activities will further explore the
stability when traveling through the atmosphere COM/COP concept and employ an advanced
if two things are kept in mind. These two things string test for rocket stability.
are center of mass and center of pressure.
Center of mass (COM) is easy to
demonstrate. It is the balance point of a rocket.
Think of it like balancing a meter stick on an
outstretched finger. If the stick rests horizontally,
the COM is directly over your finger. If the COM
is to the right of your finger, the stick will tip to
the right. If to the left of your finger, the stick will
tip to the left.
An object, tossed into the air, rotates
around its COM. Rockets also try to rotate
around their COM while in flight. If this rotation The positions of center of mass (red dot) and center of
is allowed to happen, the rocket becomes pressure (blue +) are shown for a weather vane, arrow,
unstable. This is where center of pressure (COP) and rocket. The center of pressure is to the rear of the
center of mass in each device. This enables them to
comes to the rescue. point into the wind.
COP is also a balance point. It is the
balance point of the pressure exerted on the
rocket surface by air molecules striking it as
Procedure First Activity
1. Demonstrate the construction technique
it flies through the air. Like COM, there is a
for making paper rockets. (Refer to the
midpoint for the air pressure on the rocket body.
diagrams on the next page.)
This is the COP. For a stable rocket, the COP is
located to the rear of the rocket and the COM a. Cut a strip of paper for the rocket body
is to the front. To understand why the rocket is (about 4 cm wide by 28 cm long).
stable, let’s take a look at a couple of devices b. Use a round pencil as a form and roll the
that also depend upon the placement of COM strip around the pencil.
and COP. c. Tape the long seam.
A weather vane pivots on a vertical axlen d. Close off one end to make a nose cone.
(COM) when the wind blows. One end of the e. Cut out three or four fins.
vane is pointed and the other end has a broad f. Tape the fins to the open (lower) end of the
surface. When the wind blows, the broad end rocket. Bend them outward to space them
of the vane catches more air (more air pressure) equally.
and is blown downwind. The narrow end of the 2. After students have constructed their
vane has less pressure exerted on it and points rockets, show them how to perform drop
into the wind. tests to check for stability. Hold the rocket
One end of an arrow is long, narrow, and horizontally at eye level and drop it to the
pointed while the other end has large feathers floor. If the nose of the rocket hits the floor
(or plastic fins). In flight, greater air pressure is first, the rocket is stable and ready for flight.
exerted on the feathers than on the narrow end. If the rocket falls horizontally or the fin end
This keeps the arrow from tumbling around its hits first, the rocket is unstable. Larger fins
COM and on course to its target. may be needed to stabilize the rocket. Have
41
 students perform their own stability Rolling Rocket Tubes
tests and make adjustments to their
rockets if needed.
3. Finally, demonstrate the launch
procedure for the rocket. Stand at
one end of your launch range. Insert Use 4 X 28 cm strips of paper
a straw into the rocket body. Aim the
rocket down range and puff strongly
into the straw. Liftoff!
4. Talk over ideas for safety. Discuss
wearing safety glasses. Ask students
what should be done when they
retrieve their rockets for another Tape and trim ends.
launch. (Other students should
wait until the range is clear before
launching.)
5. Have students improve their rocket Making Nose Cones
design by holding distance trials.
Students will launch their rocket
three times and find the average
distance the rocket travels. They
will then try to improve their rocket
design to get greater distance. The
student data sheets outline the
procedures and provide space to jot
down and analyze data.

Cut crown Gather Fold end

points and tape end and over and
tape tape

Making and Attaching Fins

Cut tabs and spread.

Tape tabs to rocket tube. Fold paper
square. Cut out
fins. Spread
fins and tape
to rocket tube.
Bend fin tips
outward.

42
Procedure Second Activity What will happen if the fins are placed at the
1. Give students SLS rocket patterns to nose end of the rocket? What will happen if
assemble. Two different patterns are the fin tips are bent pinwheel fashion? (Don’t
provided, one for thin pencils or dowels forget to perform drop tests before the actual
and one for fat pencils and dowels. (These flights!)
rockets do not have any fins. The actual SLS • Hold a rocket flight contest. See whose rocket
rocket uses steerable rocket engines to keep flies the furthest or whose rocket is the most
the rocket stable in flight.) After forming the accurate (make a target).
rocket body, the upper end of the tube is • In a gym or other room with a high ceiling,
folded four times and taped. launch rockets straight up next to a wall. Have
2. Before flying these rockets, have students other students estimate the altitudes reached
repeat the stability drop test. by the rockets. Count the number of concrete
blocks the rocket reached and multiply by the
Discussion height of one block.
• Why is the SLS rocket stable even though it • Place a target at the far end of the launch
doesn’t have any fins? range. An empty box makes a good target
Folding the paper makes the nose cone end and rockets that land within the box are a
of the rocket heavier than the tail end. Run a “bull’s eye.”
balance test with a finger. The balance point
(center of mass) is far forward. The center Tip Segments of a 1/4” or 3/8”
dowel can be substituted for fat
of pressure is to the rear. This combination
pencils. Cut the dowels slightly
stabilizes the rocket for flight. The stability longer than the paper strips. The
control for the paper version of the SLS extra length makes rolling the
rocket is similar to the control used by the tubes easier.
Chinese for their fire arrows (See pictorial
history section.) The actual SLS rocket
will employ steerable engines to maintain
stability.
• How do paper rockets work?
Unlike traditional rockets, paper rockets do
not carry their own propellants. Instead, a
sharp puff through the straw momentarily fills
the rocket tube with “high pressure” air. The
tube directs the air back through the opening,
producing an action force. The rocket
launches because of the equal and opposite
reaction force (Newton’s third law).

Assessment
• Have students write and illustrate a paragraph
that describes their improvements to their
rockets and how these improvements
affected their experimental results.
Completed SLS rocket
Extensions
• Have students investigate fin size and
placement for its effect on flight stability.

43
44
45
 Rocket Activity

Heavy Lifting
Objectives
Students construct balloon-powered rockets
to launch the greatest payload possible to the
classroom ceiling.

Description
Student teams receive identical parts with
which they construct their rockets. Drinking
straws guide balloon rockets up strings
suspended from the ceiling. Teams compete
to launch the greatest number of paper clips to
space (ceiling).

National Science Content Standards

Science as Inquiry Materials
• Abilities necessary to do scientific Large binder clips (one per launch pad)
inquiry Fishing line or smooth string
Physical Science Long balloons (see note on next page
• Position and motion of objects about sources)
• Motions and forces Bathroom size (3 oz) paper cup
Science and Technology 2 straight drinking straws
• Abilities of technological design 50 small paper clips
Sandwich size plastic bag
National Mathematics Content Standards Masking tape
• Number and Operations Balloon hand pumps (optional)
• Data Analysis and Probability Wooden spring-type clothespins (optional)

National Mathematics Process Standards

• Problem Solving
• Reasoning and Proof Management
• Communication Prepare your classroom by setting up “launch
• Connections pads” consisting of pieces of fishing line or
• Representations string suspended from the ceiling (one line
per team of students). If your classroom
has a suspended ceiling, use binder clips
or clothespins to attach to the metal frame
supporting the ceiling tiles. Tie the fishing
line to the clip or pins. Make sure the line is
long enough to reach the floor. Provide open
working space around each launch pad.

46
 Explain how the straw is used for guiding
the rockets. The fishing line or string is fed
through the straw and one or more balloons
are attached to it with masking tape. When the
balloon is released, the straw will ride up the
line. Stress that it is very important for students
to hold the lower
end of the line
to the floor. If
there is slack
in the line or if
the lower end of
the line is free,
the rocket will
waffle about and
not reach the
Binder clip attached to
ceiling. ceiling grid.
If you have
balloon pumps,
demonstrate how they are used to inflate the
balloons.
Avoid providing too much information for
the students. This is an exercise in creativity, Some different ways students may devise to carry the
paper clips. The plastic bag can be used too. Let teams
skill, and problem solving. Simply explain the come up with their own ideas.
activity, how to use the straws for stability, and
tell them that they can use any or all of the parts
in their supply kits to build and fly their rockets. Background
The supply kits contain three balloons. Remind NASA’s Constellation program for the next
students that they only get three balloons. generation of space rockets includes a heavy
lift launcher called the Ares V. (See pages 13-
17 for a detailed description of the rocket and
Balloon Sources pictures). Ares V will carry heavy payloads into
Many party supply stores carry variety packs orbit, such as very large scientific satellites,
that may include long balloons. Ask if they space station replacement modules and
will special order packs of long balloons for supplies, and Earth departure stages that will
you. The balloons become cylinders 5 inches propel human spacecraft to the Moon and
in diameter and 24 inches long when inflated. Mars.
They are sometimes called 524 (5 by 24 inches) Raising heavy payloads to orbit is
airships. Find manufacturers and distributors challenging. Rockets require powerful engines
by searching “524 balloons” on the Internet. and massive amounts of propellants. NASA’s
Ares V will be able to accomplish the job. It
will be one of the largest and most powerful
24” rockets ever built. However, Ares V won’t be the
only heavy lift vehicle needed. There will be a
market for commercial delivery of propellants
5” 524 Airship and modules and robots for constructing tourist
hotels, supply delivery, and more. In the future,
heavy lift vehicles will become (excuse the
expression) a “booming business.”
47
Procedure Discussion
1. Divide your students into teams of three. • Why is NASA supportive of commercial space
Explain the project to them. companies?
NASA’s space efforts are aimed at
“NASA is looking for creative ideas for expanding our horizons in space. Although
launching heavy payloads into orbit. their space rockets are easily capable of
Payloads include parts and supplies for the launching communications, weather, and
International Space Station and spacecraft Earth resources satellites, NASA continually
that will carry humans to the Moon and looks beyond. NASA explores, and when
Mars. NASA is also interested in rockets it pioneers a new technology, it seeks to
that can transport large fuel tanks that will turn over continued development to U.S.
be used to power deep space rockets. You commercial interests. That way, NASA
are challenged to build the most efficient can focus on and advance to the next new
heavy-lift rocket from the same set of horizon. NASA’s current new horizons include
materials. The team that is able to lift the the first permanent bases on the Moon and
greatest payload into space (the ceiling) is the first human expeditions to Mars. These
the winner.” are demanding challenges. When they are
met, commercial space companies will follow,
2. Provide each team with an identical kit of permitting NASA to move on to even greater
materials. Tell them that any or all of these challenges.
materials can be used for their rockets.
3. Review the launching procedure. Explain • Why is it important to construct efficient
how the straw guides the rocket up the heavy-lift vehicles?
fishing line or string and that the line must be Traveling into space is a very difficult and
held snug to the floor for the launch. Remind expensive endeavor. Huge rockets and
the teams that they only get three balloons. tremendous amounts of propellants are
They can launch as many times as they want required to accomplish the job. With some
to but should try to improve how many paper rockets, launch costs were approximately
clips they can successfully lift. $20,000 per kilogram of payload delivered
4. Draw a chart on the board for teams to into Earth orbit. If that cost were to continue,
record their results (i.e., the number of paper imagine staying at a space hotel where it
clips that reach the ceiling). would cost about $10,000 for a half liter bottle
of drinking water! Improving heavy-lift rockets
Tip If you wish to do so, provide one extra balloon (lighter rocket structures, more propellant
to each team as a replacement in case of a mishap efficient engines, etc.) will enable us to
(pop!) or as a fourth rocket for their cluster. Make a accomplish much more in space at far more
small coupon for the extra balloon and put it in the reasonable costs!
parts bag. The coupons will help you keep track
of which teams have already requested an extra
balloon. Tip Occasionally, a balloon will have a tiny pinhole
that will prevent it from being inflated or from holding
air very long. Keep a small supply of replacement
balloons.

48
Assessment
• Have each team describe their design to the
class.
How many balloons did they use?
How many paperclips did their rocket carry
to the ceiling?
How did they attach the paperclips to the
balloon?
What problems did they encounter? How
did they solve those problems?
• Write a summary of your launch vehicle using
correct science and technology terms (e.g.,
lift, payload, mass, thrust).

Extensions
• Challenge students to design a two-stage
rocket. The lower balloon “fires” before the
upper balloon. The upper balloon carries the
payload to the ceiling.

49
50
 Rocket Activity

Newton Car
Objective
To investigate the relationship between
mass, acceleration, and force as described in
Newton’s second law of motion.

Description
Small student teams use a wooden car and
rubber bands to toss a small mass off the car.
The car, resting on rollers, will be propelled
in the opposite direction. During a set of
experiments, students will vary the mass being
tossed from the car and change the number of
rubber bands used to toss the mass. Students
will measure how far the car rolls in response to
the action force generated.
National Science Content Standards:
Materials
Unifying Concepts and Processes
Newton Cars (see separate instructions)
• Evidence, models, and explanation
Cotton string
• Change, constancy, and measurement
Two rubber bands (size 19)
Science as Inquiry
Medicine bottles (see Tip)
• Abilities necessary to do scientific
25 straight drinking straws (not flexi)
inquiry
Meter stick or ruler
Physical Science
Metric beam balance or scale
• Position and motion of objects
Scissors or lighters (see Management
• Motions and forces
below)
• Properties of objects and materials
Popcorn seeds, washers, pennies,
Science and Technology
marbles, paper clips, etc. (for filling the
• Understanding about science and
bottles)
technology
Eye protection
National Mathematics Content Standards:
• Number and Operations Management
• Measurement This activity requires a smooth floor or long
• Data Analysis and Probability tables for a rolling surface. Be sure teams
understand how to set up the car and are
National Mathematics Process Standards: consistent in their placement of straws.
• Problem Solving Demonstrate the “loading” of the car. After
• Reasoning and Proof attaching the rubber band and string to the
• Communication car, press the bottle into the “V” of the rubber
• Connections bands. This process must be done the same
• Representations way each time. Also demonstrate the string
cutting process. The string must be cut and the
51
Slide rubber band How far the car moves demonstrates
ends over twin posts the second law. The magnitude of the force is
determined by how much mass is tossed and
how fast it is accelerated off the car.
Slip rubber band By varying the mass and the number of
through string loop rubber bands, students are able to see a visual
demonstration of the relationship of mass and
acceleration on force. The greater the mass of
the bottle and its contents and the greater the
acceleration (more rubber bands), the greater
the force. The effect is that the car will travel
Stretch string further in the opposite direction. (Refer to
over third post pages 19-23 for a more detailed explanation of
Newton’s laws of motion.)

Materials
Loading the Newton Car
1 1 X 3 X 8 inch board*
3 1/4” diameter by 2 1/2” long dowels (or
scissors moved out of the way in one smooth wood screws)
and quick movement. Lighters can also be used Wood glue
for burning through the string. Have students
light the ends of the string dangling down from
Procedure Making Newton Cars
the knot. The flame will climb up the strings
1. Cut the board into 12
and burn through the knot. Students must
8” lengths. (Optional:
wear eye protection with either string cutting
Bevel one edge as
technique.
shown on the previous
page.)
Background 2. Drill three 1/4” holes
Although the purpose of the Newton Car is to 3/8” deep for the
investigate Newton’s second law of motion, dowels. If using
it provides an excellent demonstration of all screws for posts
three laws. The car is a slingshot-like device. instead of dowels,
Rubber bands are stretched between two posts skip Step 3.
and held with a string loop ringing a third post. 3. Glue the dowels into
A bottle, holding various materials that can be the holes. If desired,
changed to vary its mass, is placed between bevel the upper end of
the stretched rubber bands. When the string is the dowels with sand
cut, the bottle is tossed off the car and the car paper.
travels the other way on straw rollers.
Newton’s first law is demonstrated by the * Note: Dimensions of
act of exerting a force. The car remains at rest lumber are based on
until the mass is expelled, producing a force. rough cuts. When
The car then moves. The action force exerted planed, thickness and
on the car produces an equal and opposite width are smaller. A
reaction force. The car moves the other way 1X3” board is actually
from the tossed bottle. This demonstrates 0.75 by 2.5 inches.
Newton’s third law.

52
Procedure The Experiment Assessment
1. Provide student teams with the instruction • Review the experiment report for
sheet on how to set up the Newton Car and completeness and check team statements,
the data sheet. explaining the relationship between mass,
2. Clear areas for each team to set up their acceleration, and the distances the Newton
experiment. Cars traveled.
3. Provide a station where teams can fill their • Ask students for other examples of Newton’s
bottles with different materials to change laws of motion at work.
their total mass. Place the popcorn seeds,
washers, etc., in different bowls for easy Extensions
access. The bottles do not have to be filled • Newton’s second law of motion can also be
to the top. However, the rubber bands demonstrated using a water rocket. Vary the
should be positioned around the approximate pressure in the water rocket by using different
center of mass of the bottle to get a uniform numbers of pumps. Vary the amount of
toss. water inside the bottle. Changes in mass and
4. Check each team to ensure they are being acceleration will affect the performance of the
consistent in their procedures. For instance, rocket in flight.
placing straws differently for each test would
introduce a new variable into the experiment
that could affect the results.

Tip: Provide masking tape so that

students can use small tape pieces to
mark the positions of the straws for
consistency.

Discussion
• How does adding additional rubber bands
change the acceleration?
Like all matter, the bottle has inertia, which
is the property of resistance to change in
motion. Newton’s first law of motion is often
referred to as the law of inertia. A force is
needed to change the motion of the bottle.
In this experiment the inertia of the bottle
retards the contraction of the rubber band.
Two rubber bands, working together, are able
to contract more rapidly and consequently
are able to impart a greater acceleration to
the bottle.

Tip: Ask a pharmacist for a donation of new,

8-dram-size medicine bottles.

53
54
55
 Rocket Activity

Rocket Races
Objective
Students investigate Newton’s third law of
motion by designing and constructing rocket-
powered racing cars.

Description
Individual students construct racing cars from
Styrofoam food trays and power them with the
thrust of an inflated balloon. In three racing
trials, the racers shoot along a straight course,
and the distance the racers travel is measured.
Between trials, students redesign their racers
to improve their performance and solve any
National Science Content Standards “mechanical” problems that crop up. At the
Unifying Concepts and Processes conclusion of the activity, students submit a
• Change, constancy, and measurement detailed report on their racer design and how it
Science as Inquiry performed in the trials.
• Abilities necessary to do scientific
inquiry Materials
Physical Science Styrofoam food trays (ask for donations
• Position and motion of objects from local supermarkets)
• Motions and forces Small plastic stirrer straws (round cross
Science and Technology section) - 2 per racer
• Abilities of technological design Flexi-straws - 3 per racer
4- or 5-inch round balloon
National Mathematics Content Standards Masking tape
• Number and Operations Sharp pencil
• Geometry Scissors (optional)
• Measurement Ruler
• Data Analysis and Probability Meter stick or metric measuring tape for
laying out race course
National Mathematics Process Standards Sandpaper (optional)
• Problem Solving
• Reasoning and Proof
• Communication
Management
Each student will need a Styrofoam food tray.
• Connections
Request donations from your local supermarket.
• Representations
Ask for thicker trays (about 3/16” thick). Yellow
trays used for poultry work well. Waffle-bottom
trays are acceptable. Although the trays can be
cut using scissors, save the scissors
56
for trimming. It is much easier to score the Although the rocket racer seems simple,
Styrofoam with a sharp pencil and then break there are many challenging complexities in
away the pieces. Score lines can be continuous its operation. In principle (Newton’s second
or the tip of the pencil can be punched into the law of motion), the less mass the car has, the
Styrofoam to make a dotted line. Demonstrate greater its acceleration will be. Generally, heavy
the scoring process to your students. After rocket racers do less well than lighter racers.
the pieces are broken out, the edges are However, very small racers are limited by other
smoothed. Wheels can be smoothed by rolling factors. Vehicles with short wheel bases tend
them on a hard surface while applying pressure. to circle or partially lift off the floor. Balance
Sandpaper can also be used for smoothing. becomes a problem. The mass of the balloon
Lay out a race course in a large may cause the car to tilt nose down to the floor,
open space or hallway. The space can be causing a poor start.
carpeted, but textured carpets interfere with The engineering design of the racer is
the movements of the racers. Stretch out a very important. Many designs are possible,
10 meter-long line of masking tape and mark including wide, narrow, and I-beam shaped
10-centimeter intervals. If you have a 10 meter bodies and three, four, or even six wheels.
tape measure, just tape it to the floor.
Double check the taping of the balloon
to the straw. The balloon should be completely
sealed, or it will be difficult to inflate, and some
of its thrust will be lost through the leaks. Pre-
inflating the balloon will loosen it and make it
easier to inflate through the straw.
Guide students through the redesign
process to improve their racers. If their
racers are not running well, ask them what
they think the problem is. Then, ask them
what they can do about it. Typical problems
include having wheels too tight to the sides
of the cars (friction), wheels or axles mounted
crooked (racer curves off course), and axles not
mounted in center of wheel or wheels not round Demonstrate the action-reaction principle by inserting
a pin through the straw and into a pencil eraser. Inflate
(like “clown car” wheels). the balloon, and it will pinwheel around the pencil as
air rushes out. Compare this to the straight thrust
Background produced by the balloon in the rocket cars.
The rocket racer is an excellent demonstration
of Newton’s third law of motion. Air is Students will have to review the trade-offs of
compressed inside a balloon that is expanded. their design. For example, an extra-long body
When the nossle is released, the balloon returns may provide a straighter path, but the car might
to its original uninflated size by propelling the travel a shorter distance as a result.
air out its nozzle. The straw mounted to the
balloon extends the nozzle beyond the rear end Procedure
of the car. The action force of the expelling air 1. Explain the activity to the students. Provide
produces a reaction force that pushes the racer them with the How To Build A Rocket Racer
in the opposite direction. The racer’s wheels Sheet. Go over the construction steps and
reduce friction with the floor, and the racer demonstrate how to snap out parts, mount
takes off down the race course. the wheels, and attach the straw to the
balloon.

57
2. Stress that the racer shown in the Assessment
instructions is a basic racer. Many designs • Review student Rocket Racer Data Sheets
are possible. Have them think up their own and Design Sheets.
designs. • Have students write an explanation of
3. Review the Rocket Racer Data Sheet and Newton’s third law of motion using their
make sure students know how to fill out the rocket racers as examples.
graphs and what data they should collect.
4. Distribute materials and lay out the racer
Extensions
course.
• Hold Rocket Racer drag races. Lay out a
5. When student racers are ready, have one or
3-meter-long course. The fastest car is the
two students at a time inflate their balloons
one that crosses the finish line first. Calculate
and pinch off the end of the straw to keep
racer average speed by timing start to finish
the air inside. Have them place their racers
with a stopwatch (e.g., four seconds to go
just behind the starting line and release the
three meters = 0.75 m/second or 2.7 km/h).
straws. Regardless of how much curving a
• Have students try multiple balloons for
racer does, the measured distance is how far
additional thrust. How will students design
along the straight line of the race course the
cars that are balanced with the extra load?
car reached.
• Have students control the thrust of their
6. Post distance records to motivate students to
balloons by inflating them to the same
modify their racers to set new records.
diameter each time. How can students
7. After each racer runs three times, have
ensure that the balloon is always the same?
students complete their data sheets and
• Using the same materials, what other devices
sketch their final design on the design sheets.
can be created that demonstrate the action-
reaction principle of Newton’s third law of
Discussion motion?
• Would it be a good idea for automobiles to be
powered by rocket engines?
If there was only one rocket powered
automobile on the road, it would work fine.
However, imagine rush hour traffic loaded
with rocket cars. Each would blow exhaust
gas at the vehicles to the rear.
• How are the wheels on a rocket racer similar
to and different from wheels on a regular
automobile?
Rocket racer wheels reduce friction with the
ground. They turn when the air coming from
the balloon exerts a thrust. Wheels for an
automobile also permit the car to roll across
the ground, but the thrust of an automobile
depends upon friction. The engine turns the
wheels, and friction with the rubber and the
pavement transmits the action force so that
the car rolls forward.

58
How to Build a Rocket Racer
1. Lay out your pattern on the Styrofoam tray.
You will need a racer body and wheels. Use
a pencil point to score the Styrofoam. Snap
out your pieces and smooth them. Make
sure your wheels are round! Use sandpaper
to round the wheels OR press them on a hard
surface and roll them. 4. Slide the second wheel and axle through the
remaining straw and mount the remaining
wheel at its opposite end.

2. Punch a small hole in

the center of each wheel
with the pencil. Push
the axle (stirrer) straw
through the hole of one
wheel so that it extends
1 cm on the other side.
Pinch a piece of masking
tape around the end of
the straw and smooth
it on to the wheel. Do 5. Blow up the balloon and then let the air
the same for the second out. Next, slip the straw into the balloon as
axle. Do not add wheels shown. Use masking tape to seal the balloon
to the other ends yet! nozzle to the straw. Squeeze the tape tightly
to seal all holes. Test the seal by blowing up
the balloon again through the straw.

3. Cut two large straws to the size you want.

Tape them parallel to each other on the
bottom of the racer body at opposite ends.
Slide a wheel and axel through one of the
straws and mount a second wheel on the
other end of the axle.

6. Mount the balloon and straw to the racer

with masking tape as shown. Be sure the
end of the straw (rocket nozzle) extends off
the end of the racer body.

59
Wheel Patterns
Cut out the desired wheel size. Trace the wheel outline on the
Styrofoam. Punch the pencil point through the cross to mark
the center.

60
61
62
 Rocket Activity

Pop! Rocket
Launcher
Objective
To construct a simple air pressure launcher for
paper rockets.

Description
Students stomp or jump on an empty 2-liter
soft drink (“pop”) bottle and force the air inside
through connected plastic pipes to propel a
paper rocket.

Materials
National Science Content Standards Empty (and rinsed) 2-liter plastic soft drink
Physical Science bottle
• Position and motion of objects 2 1/2” PVC tee connectors
• Motions and forces 1 1/2” PVC connector
Science and Technology 2 1/2” PVC caps
• Abilities of technological design 1- 5’ length of 1/2” PVC pipe
Duct tape
National Mathematics Content Standards Ruler
• Measurement Optional: PVC cutter

National Mathematics Process Standards Eye protection for anyone near launcher
• Connections

Management
The Pop! Rocket Launcher, although fun for
all students, is an ideal launcher for younger
students because they love to stomp on the
bottle to launch the rocket. The launcher can
be used for any kind of large paper rocket,
including the high-power paper rockets
described on page 91. However, the Pop!
Rockets described in the activity starting
on page 66 are well-suited for this group
of students because of their relatively easy
construction.
63
 Take the shopping list on the next page wall. Select a target to aim for. If using outside
to the hardware store to obtain the PVC parts. (choose a calm day), the launcher should
The PVC pipe will be cut into smaller pieces. be aimed at a clear area. For fun, place a
Use a fine-tooth saw or a PVC cutter (available basketball in the landing zone. Tell students to
from the hardware store). The PVC parts do imagine the ball is the planet Mars (it’s the right
not have to be cemented color!) and have them launch their rocket to
together. Friction will hold Mars.
the parts with occasional Make sure the student doing the
adjustments. Leave the launching and any other students near the
label on the bottle. This launcher are wearing eye protection. Do not
gives students a target to permit any students to stand in front of the
aim for when stomping. PVC Cutter launcher or in the landing zone while “launch
If the end of the bottle is operations” are taking place.
accidentally squashed,
the bottle becomes difficult to reinflate and Procedure
has to be replaced. If you prefer to remove the 1. Cut the PVC pipe into the following lengths:
label, use a marker and draw a bull’s-eye on the
side of the bottle. 3 pieces 12” long
The launch rod can be aimed at 3 pieces 6” long
different angles by tilting to one side or another.
Rotating the entire launcher horizontally 2. Insert the end of one 12” pipe a few inches
changes its direction. into into the neck of the bottle and tape it
When using the launcher, place it securely with duct tape.
in an open space. It can be used inside a 3. Follow the construction diagram below for
gymnasium or cafeteria. If using inside, aim the assembly of the launcher.
launch tube at a low angle towards a far
The launcher is ready for use.

Launcher Assembly

64
Using the Pop! Rocket Launcher
1. Place the launcher in an open space and tilt
the launch tube in the desired direction. If Tip: If you permit students to reinflate the
there is a light wind, aim in the direction of bottles themselves, demonstrate the
the wind. If shooting at targets, have each reinflation procecess. Show them how to
student aim the launcher for his or her flight. blow through their hands into the pipe.
2. Make sure the landing zone is clear of Stress that they should not place their
anyone who might be hit by the rocket. lips on the pipe itself. They can practice
3. Have the launching student put on eye actual inflation by squishing the bottle
protection and do a countdown to zero. and reinflating it.
4. The student should stomp or jump on the
label of the bottle. This will force most of the
air inside the bottle through the tubes and
launch the rocket.
5. While the student is retrieving the rocket,
reinflate the 2 liter bottle. Separate the bottle
from the launcher by pulling it from the
connector. Wrap your hand around the pipe
end to make a loose fist and blow through
opening into the pipe. Doing so keeps your
lips from touching the pipe. Reconnect the
bottle to the launcher and it is ready to go
again.
6. When the landing zone is clear, have the next
student put on the goggles, slide the rocket
on to the launcher, aim the launcher, do the
countdown, and stomp on the bottle.

65
 Rocket Activity

Pop! Rockets
Objective
Students design, construct, and launch paper
rockets.

Description
A rocket with a triangular cross section is made
from three rocket-shaped strips of card-stock
paper and launched with the Pop! Rocket
Launcher. Students can customize their rocket
fin shapes and decorate the rockets using a
computer with an illustration program. An
alternative single-piece Pop! Rocket is also
explained.

Materials
National Science Content Standards Card-stock paper
Unifying Concepts and Processes Glue stick
• Evidence, models, and explanation Cellophane tape
• Change, constancy, and measurement Scissors
Science as Inquiry Optional - Computer with an illustration
• Abilities necessary to do scientific program and printer
inquiry Crayons or colored markers
Physical Science Ruler
• Position and motion of objects Pop! Rocket Launcher (see page 63)
• Motions and forces Penny
Science and Technology 30 cm-long pieces of 1/2” PVC pipes
• Abilities of technological design

National Mathematics Content Standards Management

• Number and Operations Pop! Rockets are made by cutting out three
• Geometry rocket-shaped pieces of paper and joining them
• Measurement together. The basic pattern is a long rectangle
• Data Analysis and Probability with a triangle on one end. When the three
rocket sides are taped together, the triangles
National Mathematics Process Standards are bent inward and taped to form a three-sided
• Problem Solving pyramid that serves as the rocket’s nose cone.
• Reasoning and Proof At the opposite end are geometric shapes such
• Communication as triangles or parallelograms, that extend from
• Connections the sides of the rectangles to form the fins. The
• Representations fins are glued or taped together face-to-face to
make them stiff.

66
 The basic pattern is found on page Procedure Three-Piece Pop! Rocket
70. If you have a computer with an illustration 1. If using a computer with an illustration
program available, the pattern can be laid out program for designing Pop! Rockets, draw
on the computer and the fins custom-designed a vertical rectangle that is 3 cm wide and
by your students. The only dimension that must 22 cm long. The nose cone triangle can
be preserved is the width of the rectangle. The either be an isosceles or equilateral triangle.
three rectangles, when taped side-to-side, form Add fins to the sides of the bottom of the
a triangular prism shape that slides over the rectangle. Keep in mind that the size of the
launch tube of the Pop! Rocket Launcher. paper limits the size of the fins.
Print the blank rocket pattern or 2. After completing one rocket pattern, copy
student’s custom-designed rockets on card it two times and fit all the pieces on the
stock paper. If designing by computer, make paper with two patterns pointing up and one
three copies of the pattern on the page. To pointing down. If the fins are too large for a
make all patterns fit, use the rotation control to single sheet of paper, create two patterns on
rotate the middle pattern upside down. one page and the third on a second page.
If using the rocket with young students, 3. When the patterns are complete, students
enlist the aid of older students for the rocket can add decorations to their rockets or
assembly (peer teaching) or have the patterns wait until the patterns are printed and then
cut out and fold lines scored in advance. decorate them.
Before taping, have students draw pictures 4. Cut out the three pieces and press the edge
of themselves or friends or family peering out of a ruler to the fold lines for the fins and
from “port holes” near the nose cone end of nose cone to get a straight fold. Fold the fins
the rockets. The rockets can be decorated outward.
along their entire length. If using a computer
illustration program, the decoration can
be added to the pattern before printing.
Have students tape a penny to
the inside of one of the three nose cone
triangles before taping the nose cone
together. The penny adds additional
mass to the nose and increases its flight
stability.
To provide support for the nose
cone during taping, insert a PVC pipe
segment into the rocket.
Ask students why fins are
important to the rocket shape. After
collecting their ideas, demonstrate
how fins work by tossing two rockets
(without the pennies) like javelins into
the air. One should have fins and the
other should not. The rocket with fins will
sail straight across the room, while the
one without will flop or tumble in the air.
Have your students describe and explain
what happened.

67
5. Tape a penny securely to the inside of one of
the nose cone triangles. Ideas for Different Fin Shapes
6. Slide the pieces together and match up the
sides of the rocket body. Run a strip of tape
along the seams. Do not tape the fins or
nose cone pieces yet.
7. Pick up the rocket, bring the two side pieces
together, and tape the seam. It may be
helpful to insert the PVC pipe into the rocket
before taping.
8. Use glue stick or tape to join adjacent
fins pieces together to make three fins. If
desired, the fins can be left untaped to make
six fins.

9. Push the PVC pipe inside the rocket body

up to the position of the nose cone. Use the
pipe for support while taping. Fold the three
triangles inward and tape the seams.
10. The rocket is ready for launch. Follow the
Completed Three- launch instructions for the Pop! Rocket
Piece Pop! Rocket Launcher (page 63).

Procedure One-Piece Pop! Rocket

1. Print the pattern on the next page on card
stock paper.
2. Use a ruler and the edge of a penny to score
the fold lines. To do so, place the ruler along
a dashed line and run the edge of the penny
(held at an angle) across the paper to make a
small groove. The groove will insure that the
fold line is both accurate and straight.
3. Cut out the pattern on the solid lines.
4. Tape a penny to the inside of one of the nose
cone triangles.
5. Fold the three rectangles into a triangular
prism shape with the large tab inside. Tape
the seam.

68
6. Fold the triangles inward to form the nose
cone. The tabs should be inside. They will
provide support for taping.
7. Bend the fins outward. The rocket is ready
for flight.

Discussion
What are the parts of a rocket?

The pointy upper end of the rocket is the
nose cone. It helps the rocket spread apart
the air as the rocket flies. The nose cone can
be compared to the pointed bow of a boat
that spreads water apart as it sails forward.
Astronauts and spacecraft are usually placed
in or near the nose cone. (Note: The space
shuttle is a little different in design. However,
the astronauts still ride in the cone-shaped
front of the Orbiter.)

The body of the rocket is the tube-shaped

(triangular-shaped in this activity) part of the
rocket that holds the rocket fuel.

Engines are where the rocket fuel is burned.

These are found at the lower end of the
rocket body. The engines push the rocket
into space.

Fins are the tiny wings at the lower end of

the rocket body. They help the rocket fly
straight.

Assessment
• Ask students to write or tell a short story
describing their rocket and how they flew.
• Have students draw pictures of their rockets
flying through space.

Extensions
• Compare rockets to an arrow, a weather vane,
or a dart. Bring one or more of these objects
to class and compare them to the shape of
the students’ rockets.
• Show pictures of different rockets and
compare them to students’ rockets.

69
Three-Piece
Pop! Rocket

70
One-Piece Pop! Rocket

71
 Rocket Activity

Foam Rocket
Objective
Students will learn about rocket stability and
trajectory with rubber band-powered foam
rockets.

Description
Students will construct rockets made from pipe
insulating foam and use them to investigate the
trajectory relationship between launch angle
and range in a controlled investigation.

Materials
30 cm-long piece of polyethylene foam pipe
insulation (for 1/2” size pipe )
Rubber band (size 64)
National Science Content Standards Styrofoam food tray, cardboard, or stiff
Unifying Concepts and Processes posterboard
• Evidence, models, and explanation Duct tape
• Change, constancy, and measurement Scissors
Science as Inquiry Meter stick
• Abilities necessary to do scientific Press tack
inquiry Washer or nut
Physical Science Quadrant plans printed on card stock
• Position and motion of objects Rocket construction instructions
• Motions and forces Experiment data sheet
Science and Technology Masking tape
• Abilities of technological design Launch record sheet
Eye protection
National Mathematics Content Standards For class - tape measure
• Number and Operations
• Algebra Management
• Geometry Select a large room with a high ceiling for
• Measurement the launch range, such as a cafeteria or
• Data Analysis and Probability gymnasium. Place markers on the floor at 1
meter intervals starting at 5 meters and going to
National Mathematics Process Standards 20 meters. If it is a calm day, the investigation
• Reasoning and Proof can be conducted outside. Although the
• Communication rockets can be launched outside on windy
• Connections days, the wind becomes an uncontrolled
• Representations variable that may invalidate the results. Prepare
some sample rocket fins to show how they are
constructed. Refer to the construction
72
page for details. Before conducting the
investigation, review the concept of control. Tip Be sure the range-measuring student
In this investigation, control will be how much measures where the rocket touches down and
the rubber band is stretched when launching not where the rocket ends up after sliding or
the rockets. The experimental variable will be bouncing along the floor.
the angle of launch. Students will compare
the launch angle with the distance the rocket
travels. Organize students into teams of three. In flight, foam rockets are stabilized by
One student is the launcher. The second their fins. The fins, like feathers on an arrow,
student confirms the launch angle and gives the keep the rocket pointed in the desired direction.
launch command. The third student measures If launched straight up, the foam rocket will
the launch distance, records it, and returns climb until its momentum is overcome by
the rocket to the launch site for the next flight. gravity and air drag. At the very top of the flight
The experiment is repeated twice more with the rocket momentarily becomes unstable.
students switching roles. The distances flown It flops over as the fins catch air. The rocket
will be averaged. Teams will try different angles becomes stable again when it falls back to the
and determine what the best launch angle ground.
should be to obtain the greatest distance from When the foam rocket is launched at
the launch site. an angle of less than 90 degrees, its path is an
arc whose shape is determined by the launch
Background angle. For high launch angles, the arc is steep,
The foam rocket flies ballistically. It receives and for low angles, it is broad.
its entire thrust from the force produced by When launching a ballistic rocket straight
the elastic rubber band. The rubber band is up (neglecting air currents) the rocket will fall
stretched. When the rocket is released, the straight back to its launch site when its upward
rubber band quickly returns to its original motion stops. If the rocket is launched at an
length, launching the foam rocket in the angle of less than 90 degrees, it will land at
process. Technically, the foam rocket is a some distance from the launch site. How far
rocket in appearance only. The thrust of real away from the launch site is dependent on four
rockets typically continues for several seconds things. These are:
or minutes, causing continuous acceleration,
until propellants are exhausted. The foam rocket gravity
gets a quick pull and then coasts. Furthermore, launch angle
the mass of the foam rocket doesn’t change initial velocity
in flight. Real rockets consume propellants atmospheric drag
and their total mass diminishes. Nevertheless, Gravity causes the foam rocket to
the flight of a foam rocket is similar to that of decelerate as it climbs upward and then causes
real rockets. Its motion and course is affected it to accelerate as it falls back to the ground.
by gravity and by drag or friction with the The launch angle works with gravity to shape
atmosphere. The ability to fly foam rockets the flight path. Initial velocity and drag affects
repeatedly (without refueling) makes them ideal the flight time.
for classroom investigations on rocket motion. In the investigation, students will
The launch of a foam rocket is a good compare the launch angle to the range or
demonstration of Newton’s third law of motion. distance the foam rocket lands from the
The contraction of the rubber band produces launch site. Launch angle is the independent
an action force that propels the rocket forward variable. Gravity can be ignored because the
while exerting an opposite and equal force on acceleration of gravity will remain the same for
the launcher. In this activity, the launcher is a all flight tests. Atmospheric drag can also be
meter stick held by the student. ignored because the same rocket will be
73
flown repeatedly. Although
students will not know the initial
velocity, they will control for it
by stretching the rubber band
the same amount for each flight.
The dependent variable in the
experiment is the distance the
rocket travels.
Assuming student teams
are careful in their control
of launch angles and in the
stretching of the launch band,
they will observe that their Launch angle vs. range for rockets with the same initial launch velocity
farthest flights will come from
launches with an angle of 45
degrees. They will also observe that launches rear end of the rocket. Close off the slits with a
of 30 degrees, for example, will produce the piece of duct tape wrapped around the foam
same range as launches of 60 degrees. Twenty tube. The rocket is finished.
degrees will produce the same result as 70
degrees, etc. (Note: Range distances will not be Procedure Making the Launcher
exact because of slight differences in launching 1. Print the quadrant pattern (page 78) on card
even when teams are very careful to be stock paper.
consistent. However, repeated launches can be 2. Cut out the pattern and fold it on the dashed
averaged so that the ranges more closely agree line.
with the illustration. 3. Tape the quadrant to the meter stick so that
the black dot lies directly over the 60 cm
Procedures Constructing a Foam Rocket mark on the stick.
1. Using scissors, cut one 30-cm length of pipe 4. Press a push tack into the black dot.
foam for each team. 5. Tie a string to the push tack and hang a small
2. Cut four equally spaced slits at one end of weight, such as a nut or a washer, on the
the tube. The slits should be about 12 cm string. The weight should swing freely.
long. The fins will be mounted through these 6. Refer to the diagram to see how the launcher
slits. is used.
3. Cut a 12 cm length of duct tape down the
middle to make two pieces. Place one piece Discussion
over the other, sticky to shiny side, to make • Why didn’t the experiment protocol call for
the tape double-strong. launching at 0 and 90 degrees?
4. Slip a rubber band over the tape and press Assuming a perfect launch, a rocket launched
the tape around the nose end of the rocket straight upwards should return to the launch
(opposite the end with the slits). Press the pad. Any variation in the impact site will
tape tightly and reinforce it with another be due to air currents and not to the launch
length of tape wrapped around the tube. angle. A rocket launched horizontally will
6. Cut fin pairs from the foam food tray or stiff travel only as long as the time it takes to drop
cardboard. Refer to the fin diagram. Both to the floor.
fin pairs should be notched so that they can • Shouldn’t the rocket be launched from the
be slid together as shown in the diagram. floor for the experiment?
Different fin shapes can be used, but they Yes. However, it is awkward to do so.
should still “nest” together. Furthermore, student teams will be measuring
7. Slide the nested fins into the slits cut in the the total distance the rocket travels, and
74
consistently launching from above the floor will Cut slots the
not significantly affect the outcome. same width as the
thickness of the fin
stock.
Assessment
• Have student teams submit their completed
data sheets with conclusions.
• Have students write about potential practical
uses for the foam rocket (e.g., delivering
messages).

Nest fins together.

Different fin shapes

can be used.

Using the Launcher

Loop the rubber band over the launcher end.

Pull on the fin end of the rocket until the nose
cone is aligned with the 30 cm mark. Tilt the
launcher up at the chosen angle as indicated
with the string and weight on the quadrant.
Launch the rocket!

Launcher ready for a 45-degree angle launch.

75
Extensions the rocket travels as it falls to the floor. Using
• For advanced students, the following a stopwatch, measure the time the rocket
equation can be used for estimating range takes to reach the floor. If the rocket takes
assuming level ground and no air resistance. 0.25 seconds to reach the floor and traveled
3 meters horizontally while doing so, multiply
3 meters by 4. The initial velocity will be 12
meters per second. Students should repeat
the measurement several times and average
the data to improve their accuracy. (This
method assumes no slowing of the rocket in
flight due to air drag.)
• Different kinds of fins can be constructed for
the foam rocket. Try creating a space shuttle
orbiter or a future rocket plane for exploring
(g is the acceleration of gravity on Earth) the atmosphere of other planets.

Students will have to determine initial

velocity. If available, an electronic
photogate (science lab probeware) with
timer can be used for determining the initial
velocity. Otherwise, challenge students
to devise a method for estimating initial
velocity. One approach might be to launch
the rocket horizontally from a tabletop and
measure the horizontal distance

76
77
Launcher Quadrant Pattern
(Actual Size)

78
79
 Rocket Activity

Launch Altitude
Tracker
Objective
Using a simple altitude tracker and basic
mathematics, students will indirectly measure
the altitude achieved by the rockets they
construct.

Description
Determining the altitude reached by a rocket
is a relatively simple process using a hand-
held tracking device. The device is a sighting
tube with a marked water level that permits
measurement of the inclination of the tube.
National Science Content Standards Using simple mathematics, students will
Physical Science calculate the altitude of the rocket. With two
• Position and motion of objects trackers in different locations, accuracy of the
• Motions and forces estimates can be improved.
Science and Technology
• Understanding about science and Materials
technology Tracker (see separate instructions)
Tape measure
National Mathematics Content Standards Tangent table
• Number and Operations Data sheet
• Geometry Calculator (optional)
• Measurement
• Data Analysis and Probability

National Mathematics Process Standards

Management
Altitude trackers are easy to construct. They
• Problem Solving
are rugged and can be used again and again.
• Reasoning and Proof
Use them for altitude measurements with
• Communication
the High-Power Air Rockets and the Project
• Connections
X-51 activities. These rockets are capable of
• Representations
flights between 50 and 100 meters high. Be
sure students understand how to sight rockets
with the tracker. If you have a flagpole or tall
building near the launch site, have students
practice taking measurements of the angle
between the ground and the top of the pole
or to one of the upper corners of the building.
When students are comfortable using the
80
tracker and are consistent in measuring, they
are ready to track rockets. Lay out a baseline Single Station Tracking
from the launch site. Details for doing this - No Wind
are given in the procedure. A longer baseline
provides better measurements than a shorter
one. However, long baselines mean that your
students will be spread out on the launch range.
You may wish to enlist a teacher aide to help
with supervision.

Background
Altitude tracking of small rockets is an exciting
activity for students because it provides them
with a way of estimating how high their rocket
flies. The technique for doing this is relatively
simple. The rocket is launched and a tracker,
some distance away, sights the rocket and
determines the angle between the ground and
the rocket at the top of its flight. Using a simple
formula, the altitude is calculated.

a (altitude) = tangent of A (angle) X b (baseline)

a = tan A (b)

To solve the formula, students look for the

angle they measured on the tangent table.
For example, the angle is 30 degrees. The
tangent is 0.5774. They use that number in
the equation. The baseline (distance from the
launch pad to the tracker) is measured with a
tape measure. In our example the distance is
25 meters.

a = 0.5774 X 25 m = 14.435 m

The altitude reached by the rocket is 14.435

meters.

81
Procedure Making the Tracker
1. Fill one half of the aquarium hose with
colored water and join the ends with the
connector to form a ring.
2. Center the ring on the Marking Diagram
and mark the hose starting at 0 degrees
and going up to 90. Use a straight line for
10 degree intervals and dots for 5 degrees.
Also mark the other 0 degree mark on the
opposite side of the ring. It doesn’t matter
where the water is resting when you mark
the ring. When the ring is mounted on the
tracker, the water will settle horizontally.
3. Join the PVC pieces together as shown in
the diagram.
4. Using clear tape, tape the ring vertically to
the side of the PVC tee. The two 0 degree
marks should line up with the sighting tube.
The tracker is ready to be used.

Materials
1/2” PVC pipe (2 6”-long pieces, 1 12”-long
piece)
1/2” PVC tee connector
1 10”-length of aquarium airline hose (clear
vinyl)*
1 straight airline connector*
Water and food coloring
Permanent marker
Marking Diagram
* Available at aquarium stores

82
 Water Level Marking
Diagram

Procedure Using the Tracker Notes

1. Select an open space for the launch. If the Assuming perfect conditions, the rocket goes
wind is strong, position the launch pad up straight up from the launch pad. This creates
wind so that the wind will blow the rocket on a right angle with Earth and the computed
the field when it falls back. altitude should be accurate. However, altitude
2. Measure out the longest baseline you can estimates for rockets that stray from the vertical
conveniently have for the size of the launch will be less accurate. To minimize wind effects,
field available. Align the baseline with the two tracking stations can be used. Each are
wind. (See note for using two tracking placed at equal distances from the launcher.
stations.) The line connecting the two sites should be
3. Make sure the students at each station know parallel to the wind. The students at each site
which rocket is about to launch. When the track the rocket. Assuming the wind causes
rocket is launched, the tracking students aim the rocket to drift over the up wind station, that
their trackers at the highest point in the flight tracker will get a higher angle than if the rocket
of the rocket. The angles of the trackers had climbed straight up. The student at the
are read from the water level and the data down wind station will get a lower angle. Their
recorded. Have the students help each other estimates are averaged together to correct for
in reading the angle from the water level. For wind effects. The diagram on the next page
greater accuracy, have students average their shows how the two tracking stations coordinate
estimates. Calculations can be done back in to improve altitude estimates.
the classroom.

83
 As students compare estimates, errors before it reaches its maximum altitude does this
will be detected. Their altitude estimates are affect the measurement?
only as accurate as the measurements of Yes. Two station tracking methods are
the angles. Precise angle measurements are available to correct for drift. In addition to the
difficult, especially when the rocket is small altitude angle measurement made at each
and the altitude is great. A disagreement of station, the compass direction of the rocket’s
10 percent in the estimated altitude between position also has to be measured. This
trackers is acceptable. greatly complicates the tracking procedure.
Information about the process can be found
Discussion on page 143.
• Why will a rocket angle into the wind during
launch? Assessment
A crosswind will exert a force on the side of • Review student participation in the activity
the rocket. Because of the fins, the lower and the completeness and accuracy of their
end of the rocket has a greater surface area altitude estimates.
than the upper end. Like a weather vane, the
rocket tends to nose into the wind and veer Extensions
up wind. • If there are any local chapters of rocketry
• Does the height of the person using the clubs, invite a member in to demonstrate how
tracker have any effect on the measurement? model rocket and high-performance model
Yes. For the greatest accuracy in measuring, rocket altitude is measured. (Many model
add the tracking student’s eye height to the rocketeers insert small electronic altimeters
estimate of the rocket’s altitude. inside their rockets for direct altitude
• If the rocket drifts away from the baseline measurements.)

Two-Station Tracking - Wind

84
85
 Rocket Activity

Rocket Wind
Tunnel
Objective
Students predict the performance of their
air rockets by measuring their streamlining
properties.

Description
Air rockets are placed inside a wind tunnel,
and their resistance to the flow of air in the
tunnel is measured in tenths of grams. The
more streamlined the rocket designs are (less
National Science Content Standards resistance to the air flow), the better their
Unifying Concepts and Processes potential flight performance. Students will use
• Evidence, models, and explanation data generated in the wind tunnel to help them
• Change, constancy, and measurement design better rockets.
Science as Inquiry
• Abilities necessary to do scientific
inquiry Materials
Physical Science Paper concrete tube form (12” by 4’)
• Position and motion of objects Beam balance or electronic scale
• Motions and forces (sensitive to 0.1 grams)
Science and Technology Balance or some other weight
• Abilities of technological design Thin wire coat hanger
Nail (about 16D by 3”)
National Mathematics Content Standards 2 small screw eyes
• Number and Operations String
• Measurement Duct tape
• Data Analysis and Probability Transparency paper or clear cellophane
Small electric fan
National Mathematics Process Standards Needle-nose pliers and wire cutter
• Problem Solving Box cutter
• Reasoning and Proof Ruler
• Communication Toilet paper roll tubes - about 24
• Connections Hot glue
• Representations Flashlight
Adhesive or gummed paper reinforcing
rings

97
Management: The cardboard cement form is available
The wind tunnel should be constructed prior from large hardware stores. It generally comes
to the activity. It is simply a measurement in 8” and 12” diameters. You will need a strong
tool students can use to evaluate the potential fan to power the tunnel. The 12-inch tube
performance of their air rockets. provides students with more flexibility in their
rocket designs. It permits fin spans of nearly 12
inches.
The length of the lever arm will be
determined by the diameter of the tube you use.
If using an 8”-diameter tube, the length of the
arm inside the tunnel will be 4” and the outside
length (on the other side of the fulcrum) will be
1”. If using a 12”-tube, the dimensions should
be 6” and 1”.
When you use the tunnel, the lower end
will have to be supported so that the air flowing
through the tube has a clear pathway to leave
the tube. The air flow is downward.
An electronic balance is easier to use
than a beam balance. However, the beam
balance gives students good practice in
measuring mass and adding measurements.

Toilet paper tubes

glued together form
air vanes. Install
and glue them inside
the top of the wind
tunnel.

The rocket is supported by the lever arm. The right

side of the arm is held by the weight. Prior to testing,
the scale is brought to balance. When the tunnel is
operating, air drag on the rocket is transmitted by the
lever arm to the weight. This unbalances the scale.

Adjusting the slide weights provides a measure of the

force being exerted on the rocket.
Cutaway view of the tunnel interior
(The actual door should be smaller.)

98
Constructing the Wind Tunnel: 4. On either side of the pivot hole, twist screw
1. Using the box cutter, cut three openings eyes into the cardboard tube to act as
in the tube form. The first is a small slot supports for the nail fulcrum. When both
about 2 inches tall and 1 inch wide. Cut it eyes are in place, slide the nail through one
10 inches below the upper rim of the tube and through the loops in the lever and then
standing upright. This is the pivot hole for through the other eye. This will allow the
the balance lever. The second hole should lever to tilt like a seesaw.
be 12 by 6 inches. This is the access door 5. Attach a string to each loop of the lever. Use
hole. Cut it midway down the tube and 90 an additional piece of coat hanger wire to
degrees away from the pivot hole. Use a form a small hook, and suspend it inside
strip of duct tape to hinge the door along the tube. With the lever arm level, the hook
one side. A small flap of duct tape can serve should just be visible from the top of the
as the latch to hold the door closed during viewing port.
operation. The third opening should be 18 6. Using hot glue, glue together several toilet
by 6 inches. It should be on the opposite paper tubes. When you have enough glued
side of the door. This is the viewing port. together to fit across the opening of the tube,
2. Cover and tape the viewing port with slide the assembly about 2 inches down from
transparency paper or cellophane.
3. Make the lever arm by cutting off a piece of
coat hanger wire with the cutter. Loosely
bend the wire around the nail about three
times. With the pliers, bend one arm into a
hook. The hook should be about 1 inch from
the loops. Trim off any excess wire. Make
a second hook on the other end about 6
inches away if using the 12” tube, 4 inches
if using the 8” tube. The nail becomes the
fulcrum for the lever.

Access door the top. These serve as vanes that reduce

opposite viewing swirling of air coming from the fan. Glue the
port
tubes to the inside wall.
7. Tie the string coming from the outside loop
of the lever to a weight that will rest on the
Use duct tape to hinge balance. The string should be just long
door and for door enough for the lever to rest horizontally.
latch. 8. Set up the tunnel on some supports, such
as a couple of books or some cans to raise
it up above the floor. The idea is to provide
a clear opening below the tunnel. The air
blown into the tunnel has to leave at the
bottom. The less obstruction, the
99
better the air flow. Place the fan on the top than rockets with very straight small fins.
of the tunnel, aimed downward. The Students will discover the optimum design for
cardboard tubes you installed in step 7 their rockets by testing them in the tunnel. The
may be sufficient to support it. Otherwise, object is to reduce drag as much as possible.
place a couple of thin strips of wood or A more streamlined rocket will perform better
other material across the opening to make a under actual flight conditions.
platform.
Procedure
The wind tunnel is ready. 1. Have students construct high-performance
air rockets (see page 91).
Using the Wind Tunnel 2. Before flight, have them evaluate their
1. Prepare the rocket for hanging rockets using the data sheet. After sketching
in the tunnel by placing two their rockets and completing the basic data,
reinforcing rings on opposite the rockets should be tested in the wind
sides of the nose cone to form tunnel. The primary data gained from the
a hanging loop. Squeeze wind tunnel is the number of grams of drag
them together. (the force exerted on the rocket because of
2. Open the access door to the its shape).
tunnel and hang the rocket 3. Have students launch their rockets and
from the hook. Close the evaluate their flights on the data sheets.
door. 4. Based on their first flight results and the
3. Adjust the beam balance so wind tunnel data, have students construct
that it is level. a second rocket and try to improve its flight
4. Turn on the fan. The balance characteristics.
moves as air drag increases on the rocket. 5. Have them repeat step 2 and build one final
Readjust the balance, and determine the rocket (use the final data sheet) and test it in
difference between the mass without and the wind tunnel and in actual flight.
with the air flow. This indicates the drag
force on the rocket. Assessment
• Conduct a class discussion on what the wind
How the Wind Tunnel Works tunnel data predicted for the student’s rocket
It’s all a matter of balance. A lever supports flights.
the rocket inside the tunnel. The weight of • Review student data sheets.
the rocket pulls down on the lever. The other • Have students write a paragraph on how wind
end is pulled up. The shorter end of the lever tunnels can help in the design of a rocket.
is attached to a weight resting on the pan of
a balance. A small part of the weight is being Extensions
supported by the force exerted by the rocket’s • Investigate the wind tunnels NASA uses to
mass. When the air flow is turned on, the evaluate aircraft and rockets. Check the
drag or friction with the rocket increases that NASA websites or search the Internet under
force. The lever provides a 6 to 1 mechanical “wind tunnel NASA.”
advantage (or 4 to 1 for an 8” tunnel) that
magnifies the force exerted on the outside
weight resting on the balance pan. By adjusting
the slide weights on the balance, the drag force
being exerted on the rocket by the air flow is
measured. Rockets that are poorly constructed
or have very large fins tend to have more drag

100
101
102
 Rocket Activity

Advanced High-
Power Paper
Rockets
Objective
Design and construct advanced high-power
paper rockets for specific flight missions.

Description
Students, working individually or in small
teams, select a flight mission (what they want
their rocket to do) and design and construct a
high-power paper rocket that will achieve the
mission. They construct their rocket, predict
National Science Content Standards
its performance and the chance of mission
Unifying Concepts and Processes
success, fly the rocket, and file a post-flight
• Evidence, models, and explanation
mission report. Missions include achieving high
• Change, constancy, and measurement
altitude records, landing on a “planetary” target,
Science as Inquiry
carrying payloads, testing a rocket recovery
• Abilities necessary to do scientific
system, and more. Instructions are provided for
inquiry
different paper rocket construction techniques.
Physical Science
• Position and motion of objects
• Motions and forces Materials
Science and Technology High-Power Paper Rocket Launcher or
• Abilities of technological design Pop Rocket Launcher (See pages 63-
65)Paper 8 1/2 X 11 (white or color)
National Mathematics Content Standards Cellophane tape
• Number and Operations White glue
• Geometry Overhead projector transparency sheets
• Measurement Ruler
• Data Analysis and Probability Protractor
Scissors
National Mathematics Process Standards 1/2” PVC pipe 24” long for each rocket
• Problem Solving builder or team
• Reasoning and Proof Eye protection
• Communication Mission Report sheet
• Connections Other construction materials as required
• Representations by the team missions

103
Management missions into the solar system will require
Have students construct and fly a basic paper designing rockets with heavy lifting capabilities.
rocket to help them to become familiar with
rocket design and construction techniques Procedure Double-Long Rocket
(See the preceding activity.) Discuss possible 1. Overlap, end-to-end, two sheets of paper.
missions with the students and identify what Use tape to secure the sheets to each other
materials will be needed to fulfill their missions. and roll them around a long PVC tube.
A day or two before construction begins, have 2. Tape the tube and add a nose cone and fins.
students or teams submit mission proposals
that identify their mission, what their rocket Procedure Glue Reinforced Rocket
will look like, how it will function, and what 1. Construct a double-long rocket but do not
materials are needed for construction. use tape to seal the long edges. When the
Demonstrate ways of making heavy paper is partially rolled, squeeze a bead of
duty rockets. Show students how to roll and white glue from one end of the tube to the
strengthen a paper tube with white glue. other. Spread the glue and continue rolling
Rockets made with glued body tubes require a the tube. Add more glue as you roll. Be
couple of days for several applications of glue careful not to get any glue on the PVC.
to dry. Also demonstrate different techniques 2. After the tube is dry, smear glue over the
for making fins, nose cones, and payload entire tube to strengthen it. Several coatings
stages. of glue will yield a very strong body tube.
On launch day, post a launch schedule. (Optional: Mix food coloring into the glue to
Organize the schedule so that similar missions add color to the rocket.)
are flown consecutively. For example, if the
objective is to achieve the greatest altitude, Procedure Heavy Duty Fins
other students will be needed to track the 1. Extra strong fins can be made by folding and
rockets (See the Launch Altitude Tracker gluing multiple layers of paper together.
activity, page 80). 2. Cut out the desired fin shape and small flaps
If students have trouble coming up with for mounting the fins to the body.
flight missions, suggest a few possibilities from 3. Smear glue inside the fin and press with a
the list below: weight to keep the fin flat during drying.
Maximum Altitude 4. Glue the fins to the rocket tube.
Precision Landing (basketball planet)
Maximum Distance Downrange
Procedure Folded Nose Cone
Payload Launch
1. Trace a circle using a CD as a pattern.
Parachute Recovery
2. Fold the circle in half to make a half pie
Longest Air Time
shape.
3. Fold the circle in half twice more to make a
Background 1/4 and a then a 1/8th pie shape.
Every space rocket ever built was constructed 4. Tape the edges as indicated in the diagram.
with a specific mission in mind. The Bumper 5. Spread the nose cone with a finger tip and
Project back in the 1950s (See Historical trim it to fit the rocket. Tape it in place.
chapter), combined a small WAC Corporal
rocket with a V2 to test rocket staging, achieve
Procedure Payload Stage*
altitude records, and to carry small payloads
1. Roll a rocket body tube. Use paper and tape
for investigating the space environment. The
to close off the upper end of the tube.
Saturn V was designed to carry astronauts and
2. Roll a second piece of paper around the
landing craft to the Moon. The space shuttle
upper end of the body tube to make a
was designed as a payload and laboratory
payload stage. Tape it in place. Cut a small
carrier for low orbit missions. NASA’s new
104
window and slip a tube of overhead projector
Folded Nose Cone
transparency plastic into the payload stage.
3. Insert the payload and close off the upper
end with a standard nose cone.

Procedure Parachute Recovery System*

1. Build a payload stage rocket (without a Cut a circle about
window). Construct a parachute out of a 10 cm in diameter.
plastic grocery bag, string, tape, and a metal Fold as shown. Tape
washer. edges as shown.
2. Place the washer inside the payload stage. Spread cone and
Lightly fold and place the parachute on top. trim with a scissors
3. Make a nose cone that slips over the payload to fit rocket tube.
stage. Do not tape it to the rocket. When the
rocket noses over, the weight will separate
the nose cone and push out the parachute.
(The weight and parachute must slide easily
out of the tube or they will get stuck.)

* For a real challenge, consruct your rocket

with a parachute recovery system for a
payload.

Glue Reinforced Double

Long Rocket Tape these edges

Payload Carrier Rocket

Be careful 1. Close off end of rocket

not to glue with paper and tape.
the paper
to the PVC 2. Cut window in
tube! payload stage and
tape stage
to rocket 3. Roll tube of transparency
plastic and slide into the
payload stage.

4. Insert payload and

Heavy Duty Fins tape nose cone
to payload stage.

105
 Parachute Recovery System Crumple a piece of paper into a ball and see
how far you can throw it. Crumple a second
ball of paper around a nickel throw it again.
It will go farther. Very lightweight air rockets
have a hard time fighting drag as they fly.
Very heavy air rockets have a lot of inertia to
overcome.

Assessment
• Evaluate the mission proposals and postflight
reports for completeness.
• Have students write a paper on the role drag
(friction with the air) plays in the performance
of a rocket and how drag can be reduced.
• Have students compare the space shuttle
with the new rockets that will be used to
travel into the solar system.

Extensions
• Conduct an “X Prize” style competition. The
Construct a nose cone
with a short tube to slip
real X Prize competition led to the first non-
over the rocket body government reusable manned spacecraft
tube. flights to reach outer space. Use the Internet
to learn more about the X Prize Foundation
and its current programs. Challenge student
teams to create a payload-carrying air rocket
Discussion that can carry a 100-gram (about 50 small
• Why are rockets designed with specific paperclips) payload 50 meters into the air.
missions in mind?
No one rocket design can meet all the needs
of spaceflight missions. If a small satellite
is to be launched it is much simpler, less
expensive, and safer to use a small unmanned
rocket for the job. If a mission to an asteroid
is desired, a large rocket with a heavy payload
capacity is needed
• What design feature of the rocket has the
greatest effect on flight performance?
Air rockets fly through the air and therefore
have to be designed to create as little air
resistance as possible. Crooked fins or a
blunt nose cone increases air drag (friction),
causing the rocket to slow quickly. The
second most important design feature is
weight. Weight is a more complicated factor
than streamlining. Too much weight, and the
rocket will not fly very high. The same effect
takes place if the rocket weighs too little.
106
107
108
 Rocket Activity

Water Rocket
Launcher
Objective
Construct a launch platform for launching
water rockets.

Description
Water rockets, built from plastic soft drink
bottles, are capable of flights greater than
100 meters. The bottles are partially filled
with water and pressurized with compressed
air delivered by a hand bicycle pump or
National Science Content Standards small compressor. A special launch pad is
Physical Science required for holding the rocket while it is being
• Position and motion of objects pressurized. When the desired pressure is
• Motions and forces reached, the rocket is launched by releasing
Science and Technology hold-down clamps. The instructions that follow
• Abilities of technological design explain how to construct the launcher and
provides a list of needed materials. Only a few
National Mathematics Content Standards tools and simple construction techniques are
• Measurement required to construct a launch pad that can be
used year after year.
National Mathematics Process Standards
Materials
• Connections
Refer to the shopping list (see page 113)
Saw
Drill
Screw driver
Bicycle pump or small electric compressor

Management
Most of the materials on the shopping list are
obtained from a hardware/lumber store. If
needed, the list can be given to a salesperson
to assist in locating the needed parts. The list
includes sizes, descriptions, and the number of
each part required.
A scrap piece of 2x4 may be available at
the lumber store. You will need two short
109
pieces, 6” and 3” long. The short piece should #12). The wide end of the stopper should
have pilot holes drilled for the screws that will be nearest the nipple. Pull on the hose until
attach the block to the launcher base. The the stopper just rests on the tee. Thread the
block supports a launch rod that guides the lower nipple into the flange.
rocket during the first few moments of the liftoff. 5. Stand the 6” 2x4 block (part #3) next to the
The other block should have pilot holes for flange. Mark screw holes for three corner
attaching the corner irons to mount the block braces (part #6). The braces will hold the
to the base and for supporting the hold-down block in place. One brace goes on each side
clamps. and one on the side of the block opposite the
Although not required, it is recommended flange. Drill pilot holes into the base and the
that the wooden parts are painted or varnished. block. Screw the block to the base.
These parts will be blasted with water each time 6. Drill two pilot holes into the small block (part
a rocket is launched, and finishing the wood will #2), laid on its side. The holes should go
reduce potential warping. straight through. Place the block next to the
flange opposite the first block. Screw it in
Assembly Instructions place.
1. Screw the 7. Push an empty soft drink bottle on to the
galvanized stopper for alignment of the other parts to be
floor flange added.
(part # 7) to 8. Drill a hole in the small block large enough
the center of Inside to accept the launch rod (part #4). The hole
View should be positioned so that the rod will just
the launcher
base. rest against the side of the bottle.
2. Slide one end 9. Align the two 8” mending plates (part
of the air hose #11) with the bottle lip (just above the cap
(part #13) into threads - the bottle is upside down). You
the center hole will probably have to adjust the height of the
of the pipe tee stopper. When launching, the bottle neck
(part #9). The (rocket nozzle) will have to make a tight seal
hose should with the stopper. The mending plates (hold
be bent so down clamps) press and hold the bottle on
that it extends the stopper while air is being pumped in.
about 7 cm Turn one or both of the nipples to raise or
out the top lower the stopper and the bottle to match the
hole of the tee. It will take a little force to clamps with the bottle lip. (The two plates
make the bend. are like vice jaws that pivot sideways against
3. Thread the brass nipples (part # 8) into each the bottle neck just above the lip. Screws
end of the tee. The
hose will extend
through the top
nipple.
4. Jam the barb splicer
(part #10) into the
end of the hose that
you pushed through
the tee and nipple.
Push the other end of
the barb into the hole
of the stopper (part
110
inserted into the second hole (from the back) bands to pull the clamps apart for the launch.
of each plate serve as fulcrums. The plates 12. Thread the hook and loop cable tie (part
pivot inward to grab the bottle. (When the #14) through the end screw hole of one of
plates are pivoted outward, they release it.) the two mounting plates. This permanently
When you are satisfied that the plates will get attaches the tie to the plate. Tie the launch
a good grip on the bottle, mark the positions string to the other end of the tie. The string
of the second holes and screw the plates should be about 4 meters long.
to the upper end of the large block. Screw 13. Connect the bicycle pump or compressor
them in just enough to keep the plates from hose to the air hose. Depending upon the
rocking but not so tight as enough to prevent kind of pump you have, you may have to
them from swinging from side to side. obtain a connector to fit the pump. One
10. Install two guide screws about 3/4” apart. approach is to install a second barb splicer
The guide screws ensure that both plates into the other end of the launcher’s air hose.
open fully and release the bottle. Refer to the Cut the pump hose and push the barb into
diagram to see the positioning of the plates it to make the connection. Use small hose
on the 6” block. clamps to secure the barb to the hose.
11. Wrap several rubber bands around the Other kinds of connectors are available, and
short ends of the clamps. You will have to some experimentation may be necessary.
experiment a bit to get the right tension in the (One approach is to take the launcher and
your pump to the hardware store and ask for
recommendations.)
Top Down
View of
Hold-Down Guide screws
Clamps

Rocket bottle
Fulcrum screws

Placing the hold-down clamps (8” mending plates)

The diagram above shows the position of a rocket bottle. The clamps are screwed into the
block and are free to swing side-to-side. The guide screws ensure that both clamps open
at the same time (not just one opening wide and the other one staying put). When ready for
launch, the clamps are swung to the middle to grab on to the bottle neck just above the lip.
The diagram to the right shows the hook and loop cable tie wrapped around the clamps.
When the string is pulled, the tie is peeled off, and the clamps are released. The rubber
bands on the other end of the clamps pull them apart, and the rocket lifts off.
111
Tips on Using the Launcher • To place a rocket with water inside on the
• It is important to keep the bottle sealed with base, hold the rocket horizontally. Tip up the
the stopper as it is being pressurized. If the base and push the nozzle onto the stopper.
bottle leaks (a small spray comes out as it Grasp the bottle with the clamps and hold
is being pressurized), the seal is too loose. them in position with the cable wrap. Set
Raise the stopper by unscrewing one or both the rocket and launch platform level. It is not
of the nipples a turn or two to elevate the necessary to anchor the pad on the ground.
stopper. • A small pull on the string attached to the
• New plastic (PET) soft drink bottles are cable wrap is enough to peel it back and
capable of withstanding about 100 or more release the hold-down clamps.
pounds per square inch (psi) of pressure. A • Students near the launcher should wear
2 to 1 safety factor is recommended. Do Eye protection while the rocket is being
not let students pump the bottle above 50 pressurized and launched.
psi. Bottles can be damaged during the • Keep other students about 5 to 10 meters
construction process. Also bottles can be from the launcher (further if you elect to use
damaged on landing. Retire water rockets higher launch pressures).
after 10 flights or sooner if you suspect • Do not let students attempt to catch their
damage. rockets unless the rocket has successfully
deployed its parachute.

Completed Water
Rocket Launcher

112
113
 Rocket Activity

Water Rocket
Construction
Objective
Student teams will construct water rockets and
successfully launch them.

Description
Using plastic soft drink bottles, cardboard or
Styrofoam food trays, tape, and glue, small
teams of students design and construct
rockets. A simple assembly stand assists
them in gluing fins on their rockets, and a nose
National Science Content Standards cone is mounted on the top. A small lump of
Physical Science modeling clay is inserted into the nose cone
• Position and motion of objects to enhance the rocket’s stability in flight. The
• Motions and forces rocket is launched with a special launcher. The
Science and Technology plans for the launcher are found in the Water
• Abilities of technological design Rocket Launcher activity.

National Mathematics Content Standards

• Geometry Materials
• Measurement 2-liter soft drink bottle (1 per team)
Styrofoam food trays
National Mathematics Process Standards Posterboard, cardboard
• Connections Masking tape
Low-temperature glue guns and glue
1- to 2-inch piece of 1/2” PVC pipe
4X4X1-inch board (per team) and small
screw and washer
4 ounces of clay
Eye protection
Plastic grocery sacks or thin fabric scraps
String
Sandpaper or emery boards
Art supplies
Water rocket launcher (see page 109)
Bicycle pump or small compressor

114
Management
Begin collecting 2-liter soft drink bottles a few constructing water rockets through launch
weeks before the activity. Save the caps, too. and reporting. Student teams form rocket
Rinse the bottles and remove the labels. There companies and compete for government
will be some glue adhesive remaining on the contracts. The procedures that follow here
bottle. Goo remover can be used to clean it off, should be used for the construction phase of
but it tends to smear the surface. Project X-51.
Construct assembly stands out of small
blocks of wood. Attach a bottle cap to the Background
middle of each board with a small screw and a A water rocket is a chamber, usually a 2-liter
washer through the cap. When students begin soft drink bottle, partially filled with water. Air
constructing their rockets, they screw the bottle is forced inside with a pump. When the rocket
neck into the cap, and the board below will hold is released, the pressurized air forces water out
the rocket upright for gluing. The blocks also the nozzle (pour spout). The bottle launches
make a convenient way of storing the rockets itself in the opposite direction. The bottle
upright when not being worked on. usually has a nose cone for streamlining and
fins for stability.
Water rockets are easily capable of
100-meter-high flights, but advanced hobbyists
have combined bottles and staged bottles for
flights over 300 meters high.
Water bottle rockets are ideal for
teaching Newton’s laws of motion. The launch
Make mounting stands by screwing the plastic of the rocket easily demonstrates Newton’s
bottle caps to a board. Use a washer for third law. Students can see the water shooting
added strength. out of the nozzle (action) and see the rocket
streak into the sky (reaction). Students can also
Pre-cut the PVC segments. The cuts can experiment with different pressure levels inside
be slanted to streamline them. A saw or PVC the chamber and different amounts of water.
cutter is used for cutting. The segments act as The rocket will not fly very high if it is filled only
launch lugs to guide the rocket up the launch with air. The air will quickly rush out during the
rod during the first moments of the rocket’s launch, but its mass is very low. Consequently,
skyward climb. the thrust produced is also low (Newton’s
Be sure to use low- second law). By placing water in the bottle, the
temperature glue guns. High- air has to force the water out first before it can
temperature guns will melt the leave the bottle. The water increases the mass
plastic bottle. A small dish of expelled by the rocket, thereby increasing the
ice water in a central location thrust.
is helpful for students who Launch lug with Like all rockets, the flight performance
get hot glue on their fingers. slanted cuts. of water bottle rockets is strongly influenced
Immersing the fingers will by the rocket’s design and the care taken in its
immediately chill the glue. Do construction. Beveling the leading and trailing
not put bowls of water near edges of fins allows them to slice through the
the guns themselves because the guns use air more cleanly. Straight-mounted fins produce
electricity for heating, and shorting could occur little friction or drag with the air. A small amount
if they get wet. of ballast weight inside the nose cone helps
balance the rocket. This moves the center of
Special Note The activity entitled Project X-51 mass of the rocket forward while still leaving a
(see page 118) lays out an entire process for large fin surface area at the rear. In flight, the
115
rocket design acts like a weather vane, with the 7. Have teams glue
nose cone pointed up and the fins down. launch lugs to the side
of the rocket midway
Procedure up the body of the
1. Set up a supply station with materials such rocket and position it
as Styrofoam food trays, posterboard, tape, midway between two
sandpaper, and art supplies. fins.
2. Set up a gluing station with several heated 8. Challenge teams to
low-temperature glue guns and extra glue think up a way to
sticks. add a parachute to
3. Divide students into teams for constructing their rockets for soft
rockets. If using Project X-51, describe the landings. Plastic
project to them and explain its objectives. grocery bags or
Discuss construction techniques for their lightweight fabric
rockets. Give each team an assembly stand scraps can be cut to
and a 2-liter soft drink bottle. Project X-51 make parachutes and
requires teams to keep track of the materials strings can be used to
they used. Even if they are not doing the attach them. The nose
project, it is still good for teams to account cone must remain in Launch Lug
for the materials used. place until the rocket
4. Show teams how to use the glue guns and reaches the top of its flight; then it should
point out the cold water dish in case glue open and release the parachute.
gets on fingers. Students should wear Eye
protection when gluing.
5. Describe how fins can be smoothed with
sandpaper to slice through the air with little
drag.
6. Remind teams to add clay to the inside of
their nose cones.

Trim fin edges with sandpaper to give them

knife-blade shapes to slice through the air.

The Assembly Stand supports the rocket

while it is being constructed.

116
9. When the rockets have been completed, Assessment
have teams qualify their rockets for flight by • Inspect each team’s rocket for the
conducting string tests. Using several feet construction skill employed. Fins should be
of string, tie the rocket around the middle so vertical and securely attached. The rocket
that it balances. Because of the nose cone should be stable.
weight, the balance point will be towards the • Observe the flights and note how the recovery
nose. When the rocket hangs level, a small system designed by teams worked.
piece of tape should be temporarily fixed to
the string and bottle to keep the string from Extensions
slipping. The rocket is then twirled in a circle. • Conduct a space art show to feature
If the rocket tumbles while circling, it is not decorating schemes of team rockets. Have
stable and needs more nose cone weight, students draw artist’s conceptions of their
bigger fins, or a combination of both. If the rockets in flight. (See The Art of Spaceflight
rocket circles with the nose always pointed on page 146). To view artist’s conceptions
forward, it is stable and ready for flight. of NASA’s new Constellation program, see
(More information about string tests will be pages 13-17.
found in the instructions for Project X-51.)

Clear an open space for swing tests.

10. Review launch procedures with the teams.

The instructions are outlined in the activity
for constructing a water rocket launcher (see
page 109). Conduct an inspection the day
before the launch to ensure that rocket fins
are securely attached.
11. Set up a tracking station for measuring the
altitudes achieved by the rockets. Follow
all safety procedures and instructions when
launching the team rockets.

117
 Rocket Activity

Project X-51
Objective
To apply rocket principles and design,
construct, test, and launch a water rocket using
a real-world problem-solving simulation.

Description
Teams of students will form rocket companies
and compete in a commercial endeavor
to construct rockets capable of launching
payloads, astronaut crews, and even space
tourists to Earth orbit. Through a strong
interdisciplinary approach, balancing science
National Science Content Standards with technology, engineering, and mathematics,
Unifying Concepts and Processes
• Evidence, models, and explanation
Materials
• Change, constancy, and measurement
(All supplies need to be available for each
Science as Inquiry
group.)
• Abilities necessary to do scientific
• 2-liter soft drink bottle
inquiry
• 1-liter water bottle
Physical Science
• 1 1” long by 3/4” diameter PVC segment
• Position and motion of objects
• Aluminum soft drink can
• Motions and forces
• Scrap cardboard, poster board, and tag
Science and Technology
board
• Abilities of technological design
• Large cardboard panels (about 3X1 feet)
Science in Personal and Social Perspectives
for silhouettes
• Risks and benefits
• Duct tape
• Science and technology in local
• Masking tape
challenges
• Glue stick
• Low-temperature glue gun
National Mathematics Content Standards
• Modeling clay
• Number and Operations
• Plastic grocery bag or garbage bag
• Geometry
• String
• Measurement
• Art supplies
• Data Analysis and Probability
(The following are needed for launch day.)
• Water rocket launcher (see page 109)
National Mathematics Process Standards
• Eye protection
• Problem Solving
• Altitude tracker (see page 80)
• Reasoning and Proof
• Tape measure
• Communication
• Water
• Connections
• Representations
118
they will develop a budget, purchase play, the name of the company, and started
construction materials, and track expenditures their rocket design.
while designing and constructing their rocket.
They will then have to test the rocket for Background
stability and fill out specification sheets. Finally, From the beginning of the space program,
the teams will launch their rockets and conduct rockets, spacecraft, spacesuits, launch
a cost/benefit (altitude vs. cost) ratio. platforms, and much more have been built by
contractors. The responsibility of the National
Management Aeronautics and Space Administration has been
Prior to this project students should have the to manage the exploration of the atmosphere
opportunity to design, construct, and launch and space. When a particular space mission
water rockets using different water volumes and is decided upon, requests for proposals are
pressures to see the effect these variables have issued to American industry to build the
on the altitude. Students should also become hardware. Corporate teams propose designs
proficient in altitude tracking. (See article for rockets, space capsules, or whatever else
on page 141.) Doing so will prepare them to NASA needs for its mission. After a competitive
employ Newton’s laws of motion to maximize process, the winning corporation is chosen and
the flight properties of their rockets. money is awarded to begin construction. Often,
Divide your students into teams of three. when very large contracts are awarded, the
They will form competing rocket companies in winning companies will select other companies
a request for proposal, issued by NASA. Their as subcontractors to build component
objective is to construct the best payload/crew/ systems. This contracting strategy has worked
space tourist orbital transport rocket. The successfully for NASA for more than 50 years.
team will select roles for each member: Project Now, NASA is looking to promote
Manager, Budget Director, and Design and new space industries with the capabilities of
Launch Director. One of the student pages that constructing, launching, and controlling their
follows contains badges for each student. The own rockets. NASA looks forward to contracting
back side of the badges explain the duties for with these companies to transport supplies
each job. Take digital head shot pictures of and crew to the International Space Station,
each student and print them. Have students permitting NASA to concentrate on the large
trim the pictures and paste them on to their missions that will push outward the frontiers of
badges prior to laminating them. space.
The project takes approximately two
weeks to complete and includes a daily Procedure
schedule of tasks. Students may need Refer to the student sheets and the project
additional time to complete daily tasks and schedule for details on specific tasks and
keep on schedule. when they should be performed. The project
Collect all building materials and copy schedule calls for teacher demonstration on
all reproducibles before beginning the activity. how to make nose cones on day 3 and how to
Make several copies of the order forms and determine the center of pressure and center of
blank checks for each group. mass on day 6.
Allow enough time on the first day for
students to read and discuss all sheets and
determine how the sheets apply to the project
schedule. Focus on the student score sheet
to make sure students understand the criteria
used to assess their performance.
By the end of the first day, teams should
have decided on the roles each member will
119
Discussion
• What did you learn about running a company?
How might you have done things differently?
What was the most difficult part of the two
weeks? What do you understand now that
you were not sure or aware of before?
• Why is NASA supporting the development of
private launch vehicles?

Assessment
Base the assessment of team performance
on their documentation: Project Journal,
Silhouette, and Launch Results. Refer to the
Project X-51 Score Sheet for details.

Extensions
• Large space missions often require a wide
range of subcontractors across the United
States to provide the expertise needed
to build the launch and vehicle systems.
Learn about the contributions contractors
in your state make towards the exploration
of outer space. A good place to start is
with the Space Grant Consortium for your
state. Consortium members (colleges and
universities) promote space research and
educational activities in their home states
and work with local space industries. The
following website contains an interactive
listing of Space Grant programs by state:

http://www.nasa.gov/offices/education/
programs/national/spacegrant/home/Space_
Grant_Directors.html

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 Rocket Stability Determination
(Swing Test)
A rocket that flies straight through the air is said
to be stable. A rocket that veers off course
or tumbles is said to be unstable. Whether a
rocket is stable or unstable depends upon its
design.
All rockets have two “centers.” The first
is the center of mass. This is a point about
which the rocket balances. The picture to the
right shows a rocket suspended from a string.
The rocket is hanging horizontal. That means
that it is balanced. The string is positioned
exactly beneath the rocket’s center of mass.
(This rocket looks like it should really hang with
its tail section downward. What you can’t see
in the picture is a mass of clay placed in the
rocket’s nose cone. This gives the left side as
much mass as the right side. Hence, the rocket When designing a stable rocket, the center
balances.) of mass must be to the front and the center
The center of mass is important to a of pressure must be to the rear.
rocket. If the rocket is unstable, it will tumble
around the center of mass in flight the way a A simple way to accomplish stability is
stick tumbles when you toss it. to place fins at the rear of the rocket and place
The other “center” of a rocket is the extra mass in the nose. Look at the rockets
center of pressure. This is a point in the shape below. One of them is stable and the others are
of the rocket where half of the surface area of not. The center of mass is shown with a back
the rocket is on one side and half on the other. dot. The center of pressure is shown with a red
The center of pressure is different from the dot. Which rocket will fly on course?
center of mass in that its position is not affected
by what is inside the rocket. It is only based on
the rocket’s shape.
Air strikes the surface of the rocket as
the rocket moves. You know what this is like.
If you stick your arm outside a car window
when it is moving, you feel pressure from the
air striking your arm. The center of pressure of
a rocket is the middle point. Half of the total
pressure on the rocket is on one side of the
point and half on the other.
Depending upon the design of the
rocket, the center of mass and the center of
pressure can be in different places. When Rocket B is the most stable rocket. Rocket
the center of mass is in front of the center of C will definitely tumble in flight. Rocket A will
pressure (towards the nose end), the rocket is probably fly on a crooked path. Any cross
stable. When the center of pressure is towards winds encountered by the rocket as it climbs
the front, the rocket is unstable. will cause it to go off course.
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How to Determine Your Rocket’s Stability
1. Draw a scale diagram of your rocket on the
graph paper. Make it exactly like the shape
of your rocket as seen from the side.
2. Tie a string loop snugly around your rocket
so that you have one long end to hold.
Except for the water needed for launch, your
rocket should be set up exactly as it will be
during launch.
2. Slide the loop until the rocket hangs
horizontally. When it hangs horizontally, the
string is at the rocket’s center of mass. Mark
that spot in the middle of your rocket on the
scale diagram. Use a black dot.
3. Cut out a silhouette of your rocket from a
piece of cardboard. Make it exactly the
same shape and size of your rocket as seen
from the side.
4. Balance the silhouette on the edge of a
ruler. The center of pressure of your rocket
is where the ruler is located. Mark that spot
in the middle of your rocket on the scale
diagram. Use a red dot.
5. If the center of pressure is before (towards
the rocket’s nose) the center of mass, add
some additional clay to the rocket OR
increase the size of the fins. Repeat the tests
until the center of mass is in front.
6. Verify your design results by conducting a
swing test. Balance the rocket again with the
string. Use a couple of pieces of masking
tape to hold the string loop in position.
7. Stand in a clear area and slowly start the In flight, the rocket will try to tumble around
rocket swinging in a circle. If the rocket its center of mass. If the center of pressure
is really stable, it will swing with its nose is properly placed, the rocket will fly straight
forward and the tail to the back. instead. More air pressure will be exerted on
the lower end of the rocket than on the upper
end. This keeps the lower end down and the
nose pointed up!

Swing Test

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 It Takes a Community to Explore Space
Aerospace Engineer Electrical Engineer Physicist
Architect Environmental Scientist Public Affairs Specialist
Astronaut Geographer Robotics Engineer
Astronomer Geologist Safety and Occupational
Biologist Materials Engineer Health Specialist
Chemical Engineer Mechanical Engineer Simulation Specialist
Chemist Meteorologist Teacher
Communications Engineer Mission Controller Technician
Computer Engineer Nurse Test Pilot
Dietician Oceanographer Wildlife Biologist
Doctor

See a job that looks interesting? Want to joint the team? All these careers and many more are needed to explore space.

NASA and the companies that build rockets and spacecraft are always on the lookout for future scientists, technicians,
engineers, and mathematicians. They need people who can plan, design, build, manage, and fly missions throughout the
Solar System. Big rockets and spacecraft are comprised of many integrated systems. People, working together, build
spacesuits, prepare space food, construct energy and environmental systems, program computers, and train flight crews.
Print this page on the back of the achievement award.

Doctors keep the astronauts healthy on the ground and in space. Technicians prepare the launch pads, pack booster
parachutes, and process payloads.

Visit some of the Internet sites below. They list current NASA job openings, help future aerospace workers plan their education,
and tell about opportunities available to students. Also check out the opportunities available on the Internet sites of private
space companies that launch space tourists, satellites, and build heavy-lift rockets for transporting cargo to orbit.

Current NASA Jobs — http://www.nasajobs.nasa.gov/

Student programs, microgravity flights, contests — http://www.nasajobs.nasa.gov/studentopps/employment/default.

People of NASA, who they are and what they do — http://quest.nasa.gov/about/index.html

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Above and Beyond

Additional Explorations

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How High? angle is determined
from the tangent
table in the tracker
Using Mathematics to Estimate activity. The
Rocket Altitude tangent, multiplied
by the length of the
Students are excited to learn what altitude baseline, gives the
their rockets achieve. Altitude tracking is both altitude.
simple and tricky. If the rocket goes straight up, Single
it is pretty easy to get a good estimate of the station tracking is
altitude. The altitude tracker activity (page 80) easy to do. If you
provides a simple instrument and instructions have two or more
for estimating rocket altitudes. A baseline is students measure
stretched out from the rocket launch site. The the angle, averaging
angle to the rocket, just before it starts its fall their estimates can
back to Earth, is measured. The tangent of the increase accuracy.
Tracking
becomes more
challenging when
rockets stray from
straight up. Wind
will cause the
rocket to drift.
Wind pushes the
fins away while the
nose cone points
towards the wind.
This causes the
rocket to nose into
the wind, resulting in
larger altitude error
estimates.

Tangent Table from the

altitude tracker activity
Sample Measurement:

Angle A = 40 degrees
Tangent A = .8391
Baseline b = 25 m

a (altitude) = tan A x 25 m

a = 20.97 m

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 Wind effects can also be addressed by
employing two tracking stations at opposite
ends of the baseline. The baseline is stretched
up and downwind. Each station measures the
altitude the rocket achieves. Both stations
calculate the altitude (one result will be higher
than the actual altitude and the other lower) and
divide by two.

One method for reducing windy day error is

to set up the baseline perpendicular to the
wind direction. In the diagram, wind causes
the rocket to drift to the right. This stretches
the baseline a bit, but the overall error for
the altitude is reduced. Challenge advanced
students to come up with a way of determining
how much the baseline changes when the
rocket drifts to the right.

The above picture shows a different method for

estimating altitude that is appropriate for lower
grade students launching rockets that don’t
travel very high (e.g., straw rockets). Tracking
students simply stand back and compare the
rocket altitude to a building, tree, flagpole, etc.

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A rough estimate of rocket altitude can also be
made with a stopwatch. Time the total flight of
the rocket and divide the time by 2. This yields
the approximate time it took for the rocket to fall
from its highest point back to the ground. The
equation for falling bodies yields the altitude
estimate. This method won’t work if the rocket
has a recovery system such as streamers or
parachutes to slow its fall.

Sample Measurement:

Total flight time: 6.2 seconds

Falling time/2 = 3.1 seconds

h = 1/2 g t2
h = 1/2 x 9.8 m x 9.6 (the seconds
cancel out)
h = 47.04 m

There is a considerably more advanced method

for altitude tracking that also involves two
tracking stations. The method not only requires
measuring the altitude angle of the rocket but
also its azimuth, or compass direction, from the
tracking site. These two measurements from
Scale each station provide very accurate estimates
1 square = 1 meter of altitude regardless of how much the rocket
drifts from the vertical. The problem with the
method is that it requires a tracking device
similar to a surveyor transit plus experienced
14 meters

trackers to take the measurements. Rocket

hobbyists, especially those that participate in
high performance rocketry, use small recording
39 degrees 64 degrees altimeters inside their rocket payload sections.
These rockets are easily capable of flights of
12.5 meters 12.5 meters
several thousand meters, and ground tracking
stations have a hard time providing consistent
Here is a method for calculating altitude and accurate data. Upon recovery, the
graphically. Two tracking stations are placed altimeters are read. For more information on
equidistant from the launcher. In this example, two-station tracking and altimeters, search the
the stations are each 12.5 meters from the Internet for “rocket altitude tracking.”
launcher. Both stations measure the angle. On
a piece of graph paper, a scale drawing of the
stations and the launch site is made. Using the
principle of similar triangles, the scale altitude of
the rocket is measured - 14 meters.

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Science Fiction and
the Exploration of
Spac
Long before the first astronauts entered space,
humans dreamed of space travel. Little about
the space environment was known, and it
seemed reasonable that the worlds above
would be like the world below. In imagination,
existing forms of transportation were sufficient X-51
to travel through the heavens. Storytellers,
the first science fiction writers, concocted
adventures that carried people to the Moon on
sailing ships and platforms suspended beneath
eagles flying to catch legs of mutton dangled
just out of reach by sticks. Giant spring-
propelled sleighs and whirlwinds transported
others. In one story, people traveled to the
Moon on the temporary bridge created by
was Fritz Lang’s 1929 movie Fra im Mond.
Earth’s shadow during a lunar eclipse.
It featured a Moon rocket launched from
During the nineteenth and twentieth
underwater.
centuries, fictional space explorers began to
Since the earliest film efforts, hundreds
travel through space using rockets, cannons,
of space exploration sci-fi movies and weekly
and antigravity substances. In 1865, Jules
“cliff-hanger” serials have been created. They
Verne’s story, De la terre á la lune, space
tell fantastic stories and stretch the viewer’s
explorers traveled to the Moon inside a cannon
imagination from Earth orbit to the deepest
shell. In 1901, an H.G. Wells’ story propelled
reaches of outer space. In the late 1940s,
a spacecraft to the Moon with an antigravity
movies were joined by television and began
substance called “cavorite” in The First Men in
broadcasing multi-episode space “westerns.”
the Moon.
Today, space exploration sci-fi is among
Near the end of the nineteenth century,
the most popular of film and television genres.
motion pictures were invented. Space
Audiences love the stories, in part because
exploration science fiction (sci-fi) stories
they make almost anything seem possible. The
quickly moved to the
stories they tell are often visionary. Long before
silver screen. Sci-fi
the Apollo program, movies took humans to the
became one of the
Moon and Mars. Long before they were needed,
first movie genres. In
movie and television makers created spacesuits
1902, the 8-minute
and space maneuvering units. Large space
Le Voyage dans la
stations were erected in imaginary orbits. The
lune was released.
first space stations didn’t reach Earth orbit until
Loosely based on
the early 1970s, but they orbited Earth in 1950s
Jules Verne’s story,
films. Every few days a new extrasolar world is
the movie startled
discovered by scientists. Science fiction space
audiences with Special effects scene from explorers have been exploring those worlds for
its special effects. Le Voyage dans la lune. decades.
Another early effort
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 However • Did the movie accurately predict the future?
improbable and Give some examples of how.
however dopey
some of the Here are a few suggested movies for students
early special to review. All are available on DVDs from rental
effects may now stores and online rental stores.
seem, space
exploration Rocketship XM (1950)
movies and Engine and fuel problems during flight cause
television have Rocketship XM to zoom its crew past its original
much to offer. target, the Moon, and arrive at Mars instead. G
Scene from Fra im Mond.
Comparing forces and a destroyed Martian civilization are
the science some of the challenges faced by the crew.
and technology they present to real space
exploration is a fascinating endeavor. What Conquest of Space (1956)
has turned out to be real and actually A space crew onboard a spinning wheel space
happened? What hasn’t happened yet? What station uses a space taxi during space walks
is scientifically correct? What is scientifically to prepare their ship for launch. On its way to
incorrect or just plain silly? Mars, the crew dodges a flaming asteroid and
Regardless of their scientific and deals with emotional problems.
technological authenticity, space exploration
movies and television energize the imagination. Forbidden Planet (1956)
They have excited the masses and have helped Humans travel by flying saucer to a distant
generate popular support that makes real space world and meet their inner selves.
exploration possible.
First Men in the Moon (1964)
Opportunities for Student Research An H. G. Wells story adaptation carries two
Space exploration sci-fi offers students accidental space travelers and an eccentric
interesting and entertaining research lines. scientist to the Moon in an antigravity-propelled
Telling the difference between good and bad space sphere.
science and technology requires knowing
good science and technology. Have students 2001 A Space Odyssey (1968), 2010 (1984)
select a movie and review it for the science and In a series of slow-moving visual experiences,
technology presented. The following are a few humans travel to the Moon and Jupiter to follow
questions students might try to answer in their mysterious alien signs. The film predicts space
reviews: hotels and multi-year space missions.

• What is the movie’s title? Star Wars, Episodes I - VII ( 1977 - 2005)
• When was the movie made? Rebel forces battle an evil empire across a
• What is the plot (story) of the movie? galaxy far, far away. A wide range of space
• How was space travel accomplished? vehicles, robots, and alien life sustain the
• Describe the vehicle used. What was its action.
power source?
• Did the movie employ real science and Star Trek (1979 - 2002)
technology? Give some examples. In a series of movies Captains Kirk and Picard
• Did the movie make science and technology save Earth and strive for peace in the galaxy.
mistakes? Give some examples. Using warp drive and transporters, they boldly
• Has NASA used similar science and go where no humans have gone before.
technology to explore space? Explain.
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The Art of Spaceflight
Space art has long been a key part of the
exploration of space. In the 1950s, space artists
such as Chesley Bonestell illustrated space
exploration concepts for books and magazine
articles. At the same time, animation artists at
Disney Studios, working with space experts
such as Dr. Werner von Braun, showed what
the first missions to space, the Moon, and
beyond might look like. The American public
was enchanted by dreams of spaceflight, and
the American effort to explore outer space was
born.
Space art continues to support the
exploration of space. Besides promoting
mission concepts with decision makers and
the public, space art also provides scientists,
engineers, and technicians a concept picture
of what they are trying to do. They see what
the systems they are working on look like
when assembled together. Furthermore, space
art excites and motivates students to pursue
careers in science, technology, engineering, and
mathematics.
Early space art was created using
traditional materials and techniques. Many
space artists still portray their dreams this way,
but computer graphics has also found a place
in space art. Spacecraft can be created using
3D technology that permits them to be rotated,
enlarged or reduced, and brought forward
or backward and layered on one of many
backgrounds.

The three pictures on the right show how

forced perspective is accomplished. The
top picture is a space art conception of
the 1999 Terra Spacecraft launched on
an Atlas II rocket. The middle picture
shows the relationship between horizon
line and the vanishing point. The bottom
picture shows a sketch based on the
original but with a few lines added to
emphasize motion.

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 To create excitement, space artists often
take advantage of forced perspective. For
example, seeing a rocket launched from above
provides a unique and exciting experience for
the viewer. To create such a view, a horizon line
and a vanishing point are laid out on the canvas
or screen. Lines merging into the vanishing
point provide guides for the 3D effect. Rockets,
drawn within the lines, appear to go into or out
of the picture.
Invite students to create their own
space art. Space art begins with a mission.
Students should first decide where they want
their spacecraft to go. If the destination is Mars,
what will the Mars spacecraft require for the
mission? The length of time required to reach
Mars will necessitate a larger vehicle than a Fold the paper to prepare
vehicle for going to the Moon. More supplies the rocket for launch.
and more crew will be needed, etc.
Space art is something that students of
all ages can do. Young students can create an
animated space launch with a simple paper fold
trick.

Make two folds in a strip of paper. Draw a

launch platform on the lower segment. Draw a Pull on the top and bottom of the paper to open
rocket launching on the upper two segments. the folds and launch the rocket.

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Rocket Glossary
Action - A force (push or pull) acting on an MPCV - Multi-Purpose Crew Vehicle.
object. See Reaction. Newton’s Laws of Motion - Laws governing all
Altitude - The height above Earth achieved by a motion and in particular rocket flight.
rocket or other vehicle. Nose Cone - The cone-shaped front end of a
Attitude Control Rockets - Small rockets rocket.
that are used as active controls to change the Nozzle - A bell-shaped opening at the lower
direction (attitude) a rocket is facing in space. end of a rocket engine through which a stream
Balanced Force - A force that is of hot gases is directed.
counterbalanced by an opposing force, Orion MPCV - NASA’s planned orbital and solar
resulting in no change in motion. system exploration manned spacecraft.
Canards - Small movable fins located towards Oxidizer - A chemical containing oxygen
the nose cone of a rocket. compounds that permit rocket fuel to burn in
Case - The body of a solid propellant rocket the atmosphere and space.
that holds the propellant. Passive Controls - Stationary devices, such as
Center of Mass - The point in an object about fixed fins, that stabilize a rocket in flight.
which the object’s mass is centered. Payload - The cargo carried by a rocket.
Center of Pressure - The point on the surface Propellant - A mixture of fuel and oxidizer that
of an object about which the object’s surface burns to produce rocket thrust.
area is centered. Reaction - A movement in the opposite
Combustion Chamber - A cavity inside a direction from the imposition of an action. See
rocket where propellants burn. Action.
Compressed - Material that is forced into a Rest - The absence of movement of an object
smaller space than normal. in relation to its surroundings.
Drag - Friction forces in the atmosphere that Solid Propellant - Rocket fuel and oxidizer in
“drag” on a rocket to slow its flight. solid form.
Fins - Arrow-like wings at the lower end of a Space Launch System (SLS) - NASA’s new
rocket that stabilize the rocket in flight. evolving class of launch vehicles consisting of
Gimbaled Nozzles - Tiltable rocket nozzles rockets and spacecraft (Orion MPCV) designed
used for active flight control. to carry crews into space and rockets for lifting
Igniter - A device that ignites a rocket’s large and heavy payloads.
engines. Space Station - An Earth orbiting space
Liquid Propellant - Rocket propellants in liquid laboratory and testing ground for technologies
form. needed for missions into the solar system.
Mass - The amount of matter contained in an Stability - A measure of the smoothness of the
object. flight of the rocket.
Mass Fraction - The mass of propellants in a Stages - Two or more rockets stacked on top of
rocket divided by the rocket’s total mass. each other in order to reach a higher altitude or
Microgravity - An environment that imparts have a greater payload capacity.
to an object a net acceleration that is small Throat - The narrow opening of a rocket nozzle.
compared to what is produced by Earth at its Thrust - The force from a rocket engine that
surface. propels it.
Motion - Movement of an object in relation to Unbalanced Force - A force that is not
its surroundings. countered by another force in the opposite
Movable Fins - Rocket fins that can move to direction.
stabilize a rocket’s flight.

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NASA Resources
The National Aeronautics and Space Administration has an amazing collection of resources for
the classroom. Hundreds of educator guides, fact sheets, posters, and lithographs have been
developed for classrooms and are available for electronic downloads. Photo and video collections
chronicling NASA’s more than 50 years of aerospace research and exploration are also available.
Information about current and future programs, including NASA’s space exploration policy for the
21st century, can be obtained by electronically stepping through NASA’s Internet portal. To speed
you and your students on your way to your space exploration adventure, some of the links within
the NASA portal are highlighted below.

NASA Portal: This is where the adventure begins.

http://www.nasa.gov/home/index.html

NASA’s Exploration Program: Explore NASA’s plans for permanent bases on the Moon,
expeditions to Mars, robotic spacecraft, and missions to all points beyond:

http://www.nasa.gov/exploration/home/index.html

NASA Education: This is the place to learn about NASA’s wide-ranging formal and informal
education programs for students and educators and download curriculum materials, videos, and
podcasts:

http://education.nasa.gov/home/index.html

NASA Educational Resources: In addition to the on-line educational resource materials,

NASA supports Educator Resource Centers in all states. This site lists the location and contact
information for each site.

http://www.nasa.gov/audience/foreducators/k-4/contacts/ERCN_State_Listing.html

NASA Centers and Research Facilities: Here are the places you can go to see NASA in action.

http://www.nasa.gov/about/sites/index.html

Contact NASA: Learn more about the resources available to you, including training opportunities
with these addresses.

http://education.nasa.gov/edoffices/overview/index.html

NASA Media: Access the extensive photographic and video collections of NASA at these sites:

NASA Image Exchange

http://nix.nasa.gov/

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 Great Images In NASA
http://grin.hq.nasa.gov/

Kennedy Space Center

http://mediaarchive.ksc.nasa.gov/index.cfm

Dryden Flight Research Center
http://www.dfrc.nasa.gov/Gallery/index.html

Everything NASA
http://www.nasa.gov/multimedia/imagegallery/index.html

Destinations in Space
http://photojournal.jpl.nasa.gov/index.html

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