Loss of governor oil pressure in a non-counter-weight fitted propeller would be indicated byQuestion 32Select one:a.Decreasing RPM increasing MPb.Increasing RPM decreasing MPc.Constant RPM increasing MPd.Constant RPM decreasing MP
Question
Loss of governor oil pressure in a non-counter-weight fitted propeller would be indicated byQuestion 32Select one:a.Decreasing RPM increasing MPb.Increasing RPM decreasing MPc.Constant RPM increasing MPd.Constant RPM decreasing MP
Solution
The loss of governor oil pressure in a non-counter-weight fitted propeller would be indicated by an increase in RPM and a decrease in MP. So, the correct answer is b. Increasing RPM decreasing MP.
Here's why:
The governor of an aircraft propeller system controls the propeller's RPM. It does this by adjusting the blade angle to maintain a set RPM, regardless of the changes in the airspeed or aircraft engine power.
When the governor oil pressure is lost, the propeller blades will move towards the low pitch (or fine pitch) stop. This is because, in most propeller systems, the oil pressure works against a set of springs to control the blade angle. When the oil pressure is lost, the springs force the blades towards the low pitch stop.
The low pitch stop is the position where the propeller blades produce the least amount of drag and the most amount of thrust. This means the propeller will start to spin faster, increasing the RPM.
At the same time, the manifold pressure (MP) will decrease. This is because the engine doesn't have to work as hard to turn the propeller at the same speed, due to the reduced drag.
So, in summary, a loss of governor oil pressure in a non-counter-weight fitted propeller would result in an increase in RPM and a decrease in MP.
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