What is the function of a propeller governor?

The function of a propeller governor is to control the pitch of the propeller blades to maintain a constant RPM (revolutions per minute) during flight. This is essential because it allows the engine to operate efficiently regardless of varying load conditions. By adjusting the angle of the blades, the governor can increase or decrease the amount of thrust generated by the propeller, which helps optimize performance, fuel efficiency, and engine management. Maintaining a constant RPM ensures that the engine operates within its designed performance parameters, enhancing safety and efficiency throughout different phases of flight.

In contrast, preparing the propeller for takeoff, regulating fuel flow to the engine, or managing weight distribution on the aircraft are functions that do not directly relate to the primary role of a propeller governor. While these aspects are important for aircraft operation, they are not the specific purpose of the governor system, which is focused solely on RPM control through pitch adjustment.