Constant Speed propellers Flashcards
A constant speed propeller is also known as a _____ _____ _____.
variable pitch propeller
The pilot controls engine RPM by using the _____ _____ _____ while monitoring the tachometer.
propeller RPM control
The engine power is controlled using the _____ and the pilot monitors the _____ gauge.
throttle, MAP gauge
Avoid high manifold pressure with low propeller RPM.
How to reduce manifold pressure?
adjust propeller RPM
3 main functions of propeller governor:
- Boosts engine oil pressure
- Senses rotational speed of engine
- Controls amount of oil to the prop hub
What type of pump is used to boost engine oil in the prop governor?
Integral gear type pump
The pump is a constant displacement type and will continue to build pressure with an increase in engine speed.
It uses SPRING LOADED PRESSURE VALVE
How does prop gov senses engine speed?
It uses flyweights mounted on a flyweight head that is driven by the same driveshaft as the boost pump
When the airplane goes to a dive, the blade angle _____ sufficiently to prevent over speeding.
increases
When the airplane goes to a climb, the blade angle _____ just enough to prevent the engine speed from decreasing.
decreases
3 Propeller governor operation:
underspeed
overspeed
on-speed
_____ condition is when the engine is turning faster than the speed requested by the pilot.
The governor increases the blade of the angle, thus increasing the drag of the propeller, and the engine speed increases.
Overspeed
If the engine is turning slower than the speed requested by the pilot, an ______ condition exists.
The governor reduces the blade angle, thus reducing the drag of the propeller, and the engine speed increases.
underspeed
If the engine speed is equals to the speed requested by the pilot, an ______ exists.
Governor is maintaining the current blade angle.
onspeed
