Engines; General; Major Sections - BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual

ENGINES

GENERAL

The engines (Figure 7-1) on the Canadair
Challenger are GE Series CF34. This engine
has a high bypass ratio (6.2 to 1). The CF34
3A or 3A2 version of this engine is capable of
producing 8,729 pounds of takeoff thrust up
to 21°C (70°F) under standard sea level static
conditions. If a power loss occurs on one en-
gine, the APR system will automatically in-
crease the thrust on the operating engine to
9,220 pounds.
Modular Concept
For ease of maintenance, assembly, and dis-
assembly, the engine is designed in seven sep-
arate modules (Figure 7-2). Some of these
modules can be removed and replaced with-
out engine removal from the airplane.

MAJOR SECTIONS

For the purpose of this chapter the engine will
be discussed under seven major sections:
FAN
N
1
AIR INLET
LP SHAFT
INLET GUIDE VANE
7-2 CL 601-3A
SUPPORT
COMPRESSOR
ACCESSORY GEAR
Figure 7-1. CF34 Major Sections and Gas Flow
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CL-600-2B16 PILOT TRAINING MANUAL
1. Air inlet section
2. Fan section
3. Compressor
4. Combustor
5. Turbine
6. Exhaust
7. Accessory gear
Air Inlet Section
The nacelle fairing forms the main air inlet at
the front of the engine fan section.
Fan Section
The single-stage fan and integral two-piece nose
cone are installed in the front frame. The fan is
basically the low-pressure (LP) compressor of
the engine in conjunction with a row of stators
mounted in the front frame aft of the fan.
Air entering the engine air inlet is divided into
two flow paths aft of the fan; one path directs
COMBUSTOR
HP LP
N
N
2
2
HIGH PRESSURE
SHAFT
TURBINE
N
1
EXHAUST
Lt é e
Lt d .