15.21 Flashcards
How is a turbofan engine controlled
One control thrust lever per engine
Free movement of what is needed before engine start
Turbine and compressor
Before positioning the aircraft what are you looking for in the logbook
Outstanding entries that will prevent it from being moved
What distance must you be from the engine intake
10 metres
Why are engines ran on both wings on wing mounted engines
To prevent asymmetry problems when power is increased on a particular engine
During an acceleration check what is used as a datum
The oldest engine
On shut down where is the thrust reverser lever located
Idle position followed by the use of an independent fuel cut off lever or switch
How long should you run the engine on idle for to prevent seizure of the rotors
5 minutes
How is epr measured
Ratio of jet pipe pressure to compressor (fan) inlet pressure
How is power developed in turboprop/shaft indicated
Using torque monitoring systems
What is engine torque proportional to
Horsepower
3 methods of displaying torque
Toque oil pressure
Torque percentage
Direct horse power readout
Most common torque sensing systems
Hydro-mechanical
Electronic
Phase displacement
How does the 2 shaft system work
One shaft provides the reference signal and second shaft can twist
What system records data
Aircraft condition monitoring system
