TM 55-2835-208-23
Section II. EQUIPMENT DESCRIPTION AND DATA
1-6.
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
CHARACTERISTICS
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Supplies rotary power for driving a generator
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Supplies air for engine starting
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Gas turbine engine
CAPABILITIES AND FEATURES
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Maximum rotational speed is 61,565 rpm
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Axial pad output shaft speed is 12,000 rpm
1-7.
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
A
TURBINE ASSEMBLY:
Air enters air inlet assembly through air inlet screen. Air is
compressed by the compressor rotor and supplied to the combustor assembly. Diffuser
directs exhaust gas to the turbine wheel to generate rotational power.
B
FUEL CONTROL SYSTEM:
Supplies and meters fuel flow to combustor assembly.
C
IGNITION EXCITER:
Provides high voltage to the igniter plug.
D
COMBUSTOR ASSEMBLY:
Area where fuel and compressed air are ignited and
burned to drive the turbine wheel.
E
REDUCTION DRIVE ASSEMBLY:
Mounted to and driven by the turbine assembly,
Reduces turbine speed to main drive pad (generator) and drive assembly.
F
ACCESSORY DRIVE ASSEMBLY:
Mounted on the reduction drive. Provides mount-
ing and drive for the fuel control system and APU starter.
G
BLEED AIR MANIFOLD:
Connects bleed air from combustor assembly to the aircraft
system.
H
START BYPASS VALVE:
Bypass bleed air during APU operation to avoid compres-
sor surge.
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