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APU Systems Overview

The document discusses the auxiliary power unit (APU) of aircraft. It includes 35 sections with figures describing the various components, systems, and functions of the APU, including the compressor, ignition and starting system, bleed air system, cooling and ventilation, electrical control box, and protective shutdown systems. The purpose of the APU is to provide electrical and pneumatic power on the ground and in-flight without using the main engines.

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Ami Kar
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0% found this document useful (0 votes)
100 views35 pages

APU Systems Overview

The document discusses the auxiliary power unit (APU) of aircraft. It includes 35 sections with figures describing the various components, systems, and functions of the APU, including the compressor, ignition and starting system, bleed air system, cooling and ventilation, electrical control box, and protective shutdown systems. The purpose of the APU is to provide electrical and pneumatic power on the ground and in-flight without using the main engines.

Uploaded by

Ami Kar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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AeronauticalInstituteofBangladesh

AuxiliaryPowerUnit

Figure001

AeronauticalInstituteofBangladesh

AuxiliaryPowerUnit

Figure002

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AuxiliaryPowerUnit

Figure003

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AuxiliaryPowerUnit

Figure004

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AuxiliaryPowerUnit

Figure005

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AuxiliaryPowerUnit

Figure006

AeronauticalInstituteofBangladesh

AuxiliaryPowerUnit

Figure007

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AuxiliaryPowerUnit

Figure008

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LoadCompressor:Components

Figure009

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AuxiliaryPowerUnit

IGVControl
Figure010

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AuxiliaryPowerUnit

Figure011

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Figure012

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Figure013

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Figure014

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Figure015

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Figure016

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Figure017

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Figure018

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AuxiliaryPowerUnit

Figure019

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Ignition&StartingSystem
Figure020

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APU Starter Clutch


Figure 021

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Figure 022

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APU Start Acceleration Curve


Figure 023

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Starting Electrical Circuit (Block)


Figure 024

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APU Bleed & Surge Air


Figure 025

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Bleed Load Valve


Figure 026

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Surge Control Valve


Figure 027
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Bleed & Surge Air System


Figure 028

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AuxiliaryPowerUnit

Figure 029: Bleed & Surge Air Schematic


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APU Cooling & Ventilation


Figure 030

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APU Cooling Air Supply


Figure 031

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AeronauticalInstituteofBangladesh

Figure 032

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ECB Power Supply


Figure 033

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AeronauticalInstituteofBangladesh

ECB Front Panel


Figure 034

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APU Protective Shutdown


Figure 035

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AuxiliaryPowerUnit

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