Q - Power plant
p. 102
Q.
P
ower plant
LOW PRESSURE COMPRESSOR
centrifugal type
HIGH PRESSURE
TURBINE
HIGH PRESSURE COMPRESSOR
centrifugal type
DIFFUSER PIPES
ANNULAR COMBUSTION
CHAMBER
LOW PRESSURE TURBINE
POWER TURBINE
REDUCTION GEAR BOX
These equipments are fitted on the RGB
– the ACW generator
– the Propeller Valve Module (PVM)
– the propeller pump (HP) and overspeed
governor
– the auxiliary feathering pump
– the propeller brake (on RH engine only)
ACCESSORY GEAR BOX
driven by the HP spool.
Drives
– the DC starter/generator
– the HP fuel pump
– the engine oil pumps
1. Engine schematic
ATA 61/72
Aircraft fitted with
– two Pratt &Whitney, PW 127 F (72-212A), E (42-500) or M (42-500/72-212A)
– two, six blades propellers (Hamilton)
It is a free turbines engine, composed of 3 concentric shafts of spools:
– The shaft of the HP spool composed of the HP turbine and the HP compressor (rotation speed of the HP spool: NH). The
HP spool drives the accessory gear box (AGB)
– The shaft of the LP spool composed of the LP turbine and the LP compressor
– The Power shaft composed of 2 power turbines (Free turbines). This 2 power turbines drive the propeller through the
reduction gear box (RGB) (rotation speed of the propeller NP)
6 blades propeller
Summary of Contents for 42-500
Page 1: ...72 212A 42 500 ...
Page 7: ...A Aircraft general p 6 A Aircraft general p 6 A Aircraft general FCOM 1 00 ...
Page 12: ...A Aircraft general p 11 8 Internal lighting ATA 33 ...
Page 14: ...B Multi Function Computer p 13 B Multi Function Computer FCOM 1 01 ...
Page 16: ...C Centralized crew alerting system p 15 C Centralized crew alerting system FCOM 1 02 ...
Page 22: ...D Air p 21 D Air FCOM 1 03 ...
Page 30: ...E Automatic flight control system p 29 E Automatic flight control system FCOM 1 04 ...
Page 33: ...F Communications FCOM 1 05 p 32 F Communications ...
Page 38: ...G Electrical systems p 37 G Electrical systems FCOM 1 06 ...
Page 52: ...H Emergency equipment p 51 H Emergency equipment FCOM 1 07 ...
Page 57: ...I Fire protection p 56 I Fire protection FCOM 1 08 I Fire protection p 56 ...
Page 60: ...J Flight control p 59 J Flight control FCOM 1 09 ...
Page 65: ...K Flight instruments p 64 K Flight instruments FCOM 1 10 K Flight instruments p 64 ...
Page 74: ...L Fuel system p 73 L Fuel system FCOM 1 11 ...
Page 83: ...M Hydraulic system p 82 M Hydraulic system FCOM 1 12 M Hydraulic system p 82 ...
Page 86: ...N Ice and rain protection p 85 N Ice and rain protection FCOM 1 13 ...
Page 92: ...O Landing gear p 91 O Landing gear FCOM 1 14 ...
Page 95: ...P Navigation system p 94 P Navigation system FCOM 1 15 P Navigation system p 94 ...
Page 98: ...P Navigation system p 97 MODE 4 unsafe terrain clearance MODE 5 below glideslope ...
Page 102: ...Q Power plant p 101 Q Power plant FCOM 1 16 ...
Page 110: ...Annexes p 109 Annexes ...
Page 128: ...p 127 ...