Propellers (Turbine, Aux, Maintenance) Flashcards
What are the types of turboprop engines?
Single shaft.
Free turbine.
Types of control levers on a TPE331:
Power lever.
Condition/speed lever.
Power lever positions on a TPE331:
Reverse.
Ground idle.
Flight idle.
Maximum.
Condition lever positions for a TPE331:
Emergency shutoff.
Low RPM.
High RPM.
When does the power lever of a TPE331 control the prop pitch angle?
During ground operations.
Instruments to monitor on a TPE331:
Tachometer.
Torquemeter.
Fuel flow meter.
EGT indicator.
Define flat rated engine.
Turboprop engine whose allowable output is less than the engine is capable of producing.
Max power that a TPE331 is allowed to develop is limited by:
Amount of torque that airframe structure can accommodate.
Maximum temps turbine blades can withstand.
Range of operation of a turboprop powerplant normally used for in-flight approach and ground operations:
Beta mode
Flight operating mode for a turboprop powerplant from takeoff through landing:
Alpha mode.
Moving the TPE331 power lever forward has what effect on the prop?
Drains prop oil and increases pitch.
Moving the TPE331 power lever rearward has what effect on the prop?
Directs oil into the prop, decreasing pitch.
What component of a TPE331 automatically operates the feathering valve?
NTS (negative torque sensor)
Which turboprop propeller is allowed to go into its feather position when the engine is shut down?
PT6.
Why must the TPE331 propeller be held in low pitch when the engine is shut down?
To minimize the load on the starter due to its single shaft construction.
Why is the PT6 propeller allowed to feather when the engine is shut down?
The starter only rotates the gas generator turbine and is not loaded by the propeller.
What are the controls on the PT6?
Power control lever.
Propeller control lever.
Condition lever.
Full aft position of a PT6 propeller control lever does what?
Feathers the prop.
What are the settings of the PT6 condition lever?
Cutoff.
Idle.
Run.
Three types of reciprocating engine prop mounts:
Flanged.
Tapered.
Splined.