What does CSU stand for in the context of the propeller?

In the context of the propeller, CSU stands for Constant Speed Unit. This is a crucial component in aircraft with constant speed propellers, such as the Pilatus PC-12 NG. The Constant Speed Unit is responsible for controlling the propeller blade angle to maintain a constant RPM (revolutions per minute) during various phases of flight.

This capability is vital for optimizing performance, fuel efficiency, and engine operational safety. By automatically adjusting the pitch of the propeller blades in response to changes in power settings and flight conditions, the CSU helps ensure that the engine operates within its optimal range while providing the necessary thrust. This technology contributes significantly to the overall efficiency and reliability of the aircraft's performance.