Engines Flashcards
The helicopter is power by what kind of engines?
Two Pratt and Whitney T400-CP400 turboshaft engines.
Engine SHP ratings?
Flat-rated: 1070
Max continous each engine: 916
Somtimes listed at: 900 Because CGB is only capable of accepting: 1800 SHP
Engine compressor design?
Three stage axial, single stage centrifugal
What type of combustion chamber?
Annular
Engine air management system does what?
Provides the engine that is free of ice, dust, and other foreign particles.
Low engine RPM light illuminates when Ng drops below?
52 +/- 2%
Acruation of the ___ will close the particle separator door, regardless of switch position.
FIRE PULL HANDLE
The oil-to-fuel heat exhangers are located on?
The front face of each accessory gearbox.
The oil-to-fuel heat exhanger maintains fuel temperature of atleast?
5 degrees C at the inlet to puel pump.
Above __, a wax filled bellows actuated valve cuts off supply of oil to thw heat exhanger.
32 degrees C.
Each engine has an automatic and maunal __.
Fuel control unit.
The Power Turnine(Nf) Govenor is mounted where?
On the CGB and driven by its respective engine.
Under normal conditions the Nf is controlled by what?
Nf govenor.
Droop is defined as what?
Decrease in Power Turbine (Nf) speed as power is increased.
Without the droop compensator the engine govenor system is as much as?
12% RPM (no load to full power)
A properly rigged droop compensator will maintain Nf RPM to what?
+/- 1% from flat pitch to climbout power.
If binding occurs in the droop compensator?
A rivet in the collective linkage is desinged to shear, allowing unhindered operation of the collective control.
Torque Control Unit
A single torque control unit is mounted on the CGB.
What does the TCU do?
Recieves torquemeter oil pressure signals proportinal to the torque outputs of the two engines.
If an over torque condition is imminent:
Pneumatic signals are sent to both AFCUs to reduce fuel flow and thusbreduce torque. Limiter setting range is 102 to 104% of transmission torque.
How many oil debris detection systems (ODDS)?
5
Where are the ODDS
1 in engine, 1 in CGB, 1 in transmission, 1 in 42 and 1 in 90 degree gearboxes.
