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Combustor
The combustor consists of a single combustion
chamber. The chamber is designed to provide
for the proper mixing of air and fuel and con-
tainment of the combustion gases.
Turbine
A single-stage radial turbine is rigidly mounted
on the compressor rotor shaft. The turbine is
designed to extract almost all the energy from
the expanding combustion gases. The major
portion of the energy is used to drive the com-
pressor and the accessory gearbox.
Exhaust
The exhaust consists of a stub exhaust pipe ex-
tending into an exhaust ejector connected to the
atmosphere through an outlet on the right side
of the rear fuselage (Figure 6-4). A flapper
door on the left side of the APU enclosure pro-
vides air circulation for cooling. This air is ex-
hausted with the APU fumes through the ejector.
Figure 6-4. APU Exhaust Outlet
6-4 CL 601-3A/R
CL-600-2B16 PILOT TRAINING MANUAL
Accessory Gear
The accessory gear forms an integral part of
the APU. It converts high turbine rpm to the
speeds required for the APU accessories
which include:
APU SYSTEMS
The APU systems consist of the following:
LUBRICATING SYSTEM
The APU lubricating system is a self-con-
tained wet-sump system. The oil system is
fully automatic, providing for lubrication of
the APU rotor bearings and the planetary gear.
Oil quantity can be checked using the dip-
stick installed in the filler cap accessible
through the APU service door.
FUEL SYSTEM
The APU fuel system is a self-contained, high-
pressure, fully automatic system. The fuel
system consists of a high-pressure pump, a
fuel controller, a solenoid shutoff valve, a
flow divider, and a duplex spray nozzle.
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
• APU lubricating pump
• APU fuel control unit
• AC generator adapter unit
• Lubricating system
• Fuel system
• Ignition system
• Instrumentation
• Bleed-air control system
• APU protection system (ECU)
• APU starting system
L t é e
L t d .
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