Loss of governor oil pressure to a counter-weight fitted propeller would be indicated byQuestion 23Select one:a.Decreasing RPM increasing MPb.Increasing RPM decreasing MPc.Constant RPM increasing MPd.Constant RPM decreasing MP
Question
Loss of governor oil pressure to a counter-weight fitted propeller would be indicated byQuestion 23Select 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 to a 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 counterweights on the propeller cause the blades to move towards a low pitch, high RPM setting. This is a fail-safe feature designed to ensure that the propeller doesn't go into an overspeed condition if the governor fails.
As the RPM increases, the manifold pressure (MP) would decrease. This is because the engine doesn't have to work as hard to maintain the same speed, resulting in a drop in MP.
So, if you see an increase in RPM and a decrease in MP, it's an indication that there's a loss of governor oil pressure to the counter-weight fitted propeller.
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