Propeller Governor

A mechanical device on constant-speed propeller aircraft that automatically adjusts the blade pitch angle to maintain a pilot-selected RPM regardless of changes in airspeed, power setting, or aircraft attitude. The governor senses RPM via flyweights and uses engine oil pressure to increase or decrease blade angle. The pilot sets the desired RPM with the propeller control (blue lever), and the governor continuously fine-tunes blade pitch to maintain that RPM. Understanding the governor is essential for managing the relationship between manifold pressure and RPM in aircraft with constant-speed propellers.