What is one of the functions of a constant speed propeller governor?

A constant speed propeller governor plays a crucial role in managing the performance of a constant speed propeller by sensing the rotational speed of the propeller. This feedback mechanism allows the governor to adjust the pitch of the propeller blades to maintain a specified engine RPM, regardless of changes in power output or flight conditions. By ensuring that the propeller operates at the desired speed, the governor optimizes engine efficiency and performance, enhancing aircraft handling and fuel economy during flight.

The ability to sense propeller speed is essential for the governor to make real-time adjustments. It continuously monitors how fast the propeller is rotating and can either increase or decrease the blade pitch to increase or reduce drag accordingly. This function is vital for operations such as takeoff, climb, cruise, and descent, enabling pilots to achieve the best performance from the aircraft.

In contrast, the other options do not accurately describe the primary role of a constant speed propeller governor. The governor does not permanently fix the position of the propeller (the propeller's pitch changes), it does not directly increase the engine's fuel supply (the fuel flow is managed by the fuel system), and it does not cool the engine and propeller (cooling is typically achieved through separate cooling systems). These distinctions