Aerospace Marine DefenseS
Fluid Power, Control and Actuation Products
on the Boeing 747-400
The Boeing 747-400 incorporates evolving technology into what is the world's
most modern and fuel efficient airliner in
commercial operation today. The
Vickers Aerospace, Marine, Defens
Group is a recognized leader in advanced-technology hydraulic, pneumatic and electrohydraulic components,
controls and assemblies, demonstrating
our ability as a single source supplier.
CS-10A o 3/97
The new 747-400 will deliver more
range, better fuel economy and lower
operating costs. The Boeing 747-400 is
powered by four Pratt and Whitney,
Roils Royce or General Electricnaiimrv
enienlsatdae5,0 pud f
trs.Whamxiutkefwigt
trs.Whamxiutkefwigt
of 870,000 lbs. (394,632 kg), the 747
-400 is capable of accommodating up to
550 passengers, non-stop for up to
8200 statute miles (13,140 kin).
The 747-400 design embodies technological advances in aerodynamics,
structural, materials, avionics and interior design. The most notable aerodyetsdsgedo
reduce fuel burn and extend the 747
-400's range are the six-foot longer
wings with six-foot-high winglets; angled
upward and slightly outward. Winglets
offer a fuel burn improvement of about
three percent. The wing-to-body fairing
has been recontoured for drag improvement,
The Hydraulic System
The 747-400 hydraulic system supplies
power for the flight controls, braking,
steering, trailing edge flap and landing
gear actuation. Hydraulic power is supplied by four separate 3000 psi (207
bar) hydraulic systems.
The number two and number three hydraulic systems (number two and number three engines) are reserved for flight
controls and each have an engine driven pump and a motorpump.
All
systems, however, are connected to
peak hydraulic demands. In addition,
the hydraulic system has been organized in such a way that normal flight
capability is possible with only two of the
four hydraulic systems operating. The
aircraft can be flown under emergency
Each of the four systems is pressurized
by an engine driven pump and connectd
paalll
i wih ethe anairdrivnected in parallel with either an air ine
en moorpum.
pup ora
Th eng
driven pumps and air driven pumps are
Vickers model PV3-240 Series variable
dispacemnt
ilineunit andareevent
equipped with an inlet boost impeller
andEDV(electical
deressurzation
valve). The two motorpumps are VICk
ers model MPEV3-056-6 AC electric
motor driven variable displacement
pumps.
Pumps.
The number one and number four hydraulic systems (number one and number four engines) are considered the
auxiliary power systems and each has
an engine driven pump and an air driven pump.
power controls on each axis.
conditions with only one system.
The engine driven pumps supply normal
hydraulic ower for their res pective sys
tems. The air driven pump or motor-
All four hydraulic systems control the
airplane in the pitch, yaw and roll axis.
Each aileron elevator and rudder is driven by two system actuator to
e ytossesatn oehrt
power a dual tandem actuator. If one
system fails, the other can operate the
associated control surface through its
full range.
pump automatically takes over in the
that the engine driven pump cannot supply the full demand, such as during simultaneous use of landing gear
and flight controls. The engine driven
pumps will handle all in-flight conditions
except landing and takeoff. The air driven pump and motorpump are also available for emergency operation in the
event of an engine or engine driven hydraulic pump malfunction.
Total capacity of the system pumps is
so great that no accumulators are needed to augment pump output in meeting
The 747-400 design embodies technological advances in aerodynamics, structural, materials, avionics
and interior design.
The Hydraulic System Simplified
Engine Pump
PV3-240-SERIES
Air Driven Pump
PV3-240-Series
Pressure System
Assembly
36370-6
Engine Pump
PV3-240-SERIES
Engine Pump
PV3-240-SERIES
Engine Pump
PV3-240-SERIES
Electric Motorpump
MPEV3-056-6
Electric Motorpump
MPEV3-056-6
Air Driven Pump
PV3-240-Senes
Pressure System
Assembly
36370-6
Pressure System
Assembly
36370-6
Pressure System
Assembly
36370-6
Brake Actuation
-
Brake Actuation
Assembly
70507-2
Assembly
70507-2
Stabilizer Trim
Selector Valve
36500
Stabilizer Trim
Drive Motor
MF1-095-6
Trailing Edge Flap
Control Module
68160-2
as~~~~~~~~-
36370-6
Modular Pressure System
Assembly
68530
Motor Operated Cartridge
Valve Assembly
This central hydraulic power manifold
is used in each of the four main hydraulic systems of the Boeing 747-400
aircraft. One is mounted at each engine and collects output flow from the
engine, air drive, and electric pumps.
The assembly filters the flow of hydraulic fluid for use inthe hydraulic
system. Also provided is a ground
service quick disconnect for filling or
testing, main system relief valve and
dual pressure switches for indication
of system pressure availability.
This assembly is a two position valve
which provides positive flow control with
3000 psi (207 bar) operating hydraulic
pressure. This unit is used as a bypass
valve in the Boeing 747-400 stabilizer
trim control system, the trailing edge flap
control system, and also the wing gear
alternate extend system. The assembly
is a cartridge style plug-in
module using a D.C. motor driven 90 degree rotational actuator. Motor output
speed is reduced, and torque multiplied,
by means of three planetary gear passes.
A manual override lever is provided
which, when operated, de-clutches the
gear train and moves the output shaft as
required. The manual operating lever
also serves as a position indicator
68160-2
Trailing Edge Flap Control
Module
_
This unit controls hydraulic fluid flow
3 pressure
* fand to the trailing edge flap_ _
drive motor The module is a servo
_ _ _
valve providing flow in proportion to the _ _ _
difference between the pilot's commanded position and the actual flap
position. In addition, the module contains a flow limiter that limits the maximum rate at which the flaps can move
as well as giving flow priority to the
brakes or other systems if pressure decreases to 2000 psi (138 bar) or below.
A motor operated bypass valve is included to depressurize the system in
flight or, in the event of an asymmetrical
flap condition. Two assemblies are utilized in each aircraft. One assembly
controls the inboard flaps and one controls the outboard flaps.
36500
Hydraulic Solenoid Valve
This is a normally open, solenoid (dual
coil) operated, hydraulic shutoff valve.
This hydraulic solenoid valve is capable
of millions of cycles and is used in the
Boeing 747-400 stabilizer trim system.
This valve is typical of solenoid operated pilot valves used extensively
throughout the aircraft hydraulic systems.
70507-2
Dual Brake Pressure
Metering Valve Assembly
This assembly is installed in the main
landing gear wheel well and is controlled by the pilot through a mechanical system of linkages, quadrants and
cables. The purpose of the unit is to
control the hydraulic actuation pressures to the brakes as a function of
input force. Included in the assembly
are two force command metering
valves for modulating brake pressure
and a de-spin actuator to stop the
wheels from spinning upon landing gear
retraction. Input to the metering valves
is by means of a splined common shaft.
Input to the de-spin actuator is hydraulic
pressure from the aircraft's hydraulic
system. The same valve is used on the
757 and 767.
Summary
Vickers Aerospace, Marine, Defense Components on the 747-400
MODEL NO.
DESCRIPTION
PV3-240-Series
Main Engine Driven Pump
Air Driven Pump
MPEV3-056-6
System Hydraulic Power
MF1-095-6
Stabilizer Trim Drive
70507-2
Brake Actuation and De-Spin
68160-2/3
Trailing Edge Flap Drive
36370
Hydraulic System Fluid Filtration
68530
Trailing Edge Flap Bypass
45080-1
Hydraulic Solenoid Valve
8195-33
Hydraulic system transmitter in landing gear wheel well
36610-3
Landing Gear Selector
37540-1
Cargo door restraint
62630
Rapid Response Hydraulic Relief Valve
67530-2
Hydraulic Pressure Operated Check Valve
68640-2
Pressure Operated Time Delay Restrictor Check Valve
70599
Pressure Operated Brake Source Selector Valve
36500
Controls Stabilizer Trim Selector Valve
68020-2/3
Controls Trailing Edge Flap Speed
QTY PER A/C
VICKERS DIVISION
Fluid Power
Sterer
PV3-240 Series
Engine Driven and Air
Driven Pump
MPEV3-056-6
Electric Motor Driven Pump
Primary system power is also supplied
rotary shaft motion to drive the boost
Hydraulic power for all four hydraulic
systems is supplied by six 37.5 gpm
(142 L/min), 3800 rpm, variable displacement, 3000 psi (207 bar), pressure compensated inline piston
pumps. Four of the units are used as
engine driven pumps and two are
used as air driven pumps. The units
are equipped with an inlet boost impeller and an outlet blocking valve with
internal check. Displacement is 2.40
cu. in./rev. (39.32 ml/rev). Pump
weight is 29.5 lbs (13.38 kg).
by two fluid-cooled, AC electric motor
driven, 3000 psi (207 bar), variabledisplacement, pressure compensated
inline piston pumps. The motorpump
converts aircraft electrical power to
pump, cooling flow pump and the inline
piston pump. The unit produces 12 gpm
(45 Umin) flow at 5750 rpm. Displacement is 0.48 cu. in./rev. (7.87 ml/rev).
Motorpump weight is 49 lbs. (22.23 kg).
MFI-095-6
Stabilizer Trim Drive Motor
Stabilizer trim actuation is provided by
two Vickers 3000 psi (207 bar),
constant displacement, nine piston,
bent-axis hydraulic motors. Each motor produces 383.4 in. lbs. torque at
2970 psid with a rated speed of 2320
rpm and an intermittent speed of 6200
rpm. Displacement is 0.803 cu. in./rev.
(13.15 ml/rev). Motor weight is 9.75
lbs. (4.42 kg).
- - - - -
- - - -
The Vickers Aerospace Marine Defense Group
The combined divisions of Vickers Aerospace Marine Defense Group and its sister company Aeroquip Corporation form a synergy
of multi-technology capabilities serving aerospace, marine, defense markets worldwide. The result is a new dimension of system
capabilities and quality products from concept through life cycle.
Manufacturing
* Sales
* Service Centers
Global locations
Vickers, Incorporated
Flud Power Divsion
5353 Highand Drive
Jackson MS39206-3449
USA
Phone:
(601)981-2811
Fax
t601)987-5255
Telex
62915661
Easylink
62915661
Vickers Systems Divsion
TRINOVA Ltd
Aerospace Manine
DefenseGroup
Larchwood Avenue
Bedhafrrpon
Hanpshire P09 3DN
England
Phone:
(44)1705486451
Fax:
(44) 705-492400
Telex:
86749
Vickers Systems Dsion
TRINOVAGmbH
Aerospace Marine Dedese Group
Post Fach 1241
AmdJoserh 16
Weruhnim. D-61269
Germany
Phone:
(49) 6081-1030
Fax:
(49) 6081-103359
VickersSystems Division
TRINOVA SpA.
Defense Group
Aerospace Mamne
Via Monzeses
34
Vignale. Milan 20060
Ilaly
Phone:
(39)2 95058-222
Fa:
{39) 2 956730
Tele:
843333217
Vickes Systems Dilison
TRINOVA S.A
Aerospace Marine Defense Group
LePareClub es Septs Deniers
Bat 2
78,Cheirin des Ses-Deniers
31200 Tououse
France
Phone:
(33)5 61573-333
Fax:
(33)5 61578-777
TOKIMEC. Incorporated
Aero &Defense Dvisvon
Vickers. Incorporated
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Vickers, Incorporated
Electromechanical Division
Vickers Incorporated
Steaer
Division
Vrkers, Incorporated
Aerospace Marine Deense Group
1646, Minar-Kamataz-Chome
24 E,Glerolden Ave.
36275 Panersen Ave.
4690 Colorado Blvd.
44 Changi Soulh Street 1
Oha-Ku, Tokyo 144
Japan
Phone:
(03)3737-8641
(03) 3737-8868
Fax:
Telex
0246-6193
Glancden, PA19036
USA
Phone:
(610)583-9400
Fax
(610) 583-3985
Grand Rapids, MI49bS9
USA
Phone
(616)949-1090
Fax
(616) 949-2744
Telex:
192680
Los Angeles
USA
Phone:
Fax:
Telex:
Charngi Indusrl Estate
Singapore,486762
Phone:
(65)5486620
Fax:
(65)5486619
CA 90039
(018)490-0200
(818) 241-3772
62209073
http:ltlwifw.vickers-systefms.com
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contact any of the above Vickers addresses
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VICKEg
