Prop System Flashcards
RPM (in flight) is controlled by the
Blade angle?
Fuel topping governor
28 degree switch
Pitch lock reset
32 degree switch
Oil cooler inducer
Prop flight idle stop
Prop sync
36 degree switch
Low rpm interlock
48 degree switch
Landing gear warning system
60 degree switch
Autofeather system
Landing gear warning system
Takeoff position degree?
90 degrees
34 to 90 degrees
Flight range
Power lever position Ground start
What is the coordinator position and blade angle?
15 degrees
0 degrees
Power lever position Ground Idle
What is the coordinator position and blade angle?
9 degrees
-6 degrees
Power lever position Max Reverse
What is the coordinator position and blade angle?
0 degrees
-13 degrees
Beta range blade angle controlled by…
RPM controlled by…
Blade angle range in beta?
Power lever position
Fuel controlled unit
-13 to 11 degrees
When does electronic governing work?
- SYNC SERVO switches to NORMAL with a master prop selected
- Power levers above 32 degrees coordinator
Autofeather actuation
- electrically armed
- power lever above 60 degrees coordinator
- prop producing less than 500 lbs thrust
- no other feather button in feather position
Autofeather priority
4,1,3,2
NTS lever position for actuation
Greater than 24 degrees
Engine safety coupling range
-500 to -1700SHP
Beta follow up minimum blade angle range
11 degrees to 68 degrees coord then to 22.5 to 88.
Takeoff: 22.5 to 90
Low pitch stop
Mechanicle limits blade angle to 13 degrees min.
Pitchlock over speed limit
Blade angle range
103.5 percent
17 and 57 degrees blade angle
Speed biased motor
2.5% sensed
Plus 6 minus 4% rpm
What blade angle does the backup valve close
Less than 24 degrees