Constant Speed Drive Governor

A Constant Speed Drive (CSD) Governor is a device used in aircraft engines to maintain a constant rotational speed of the engine's output shaft. It is an essential component in ensuring the engine operates at a consistent speed, which is crucial for the proper functioning of various aircraft systems.

The CSD Governor works by monitoring the rotational speed of the engine and adjusting the fuel flow or other parameters to maintain a constant speed. It does this by controlling the position of the engine's fuel control unit or other relevant components.

The governor receives input from various sensors, such as the engine speed sensor, and compares it to the desired speed set by the pilot or the aircraft's control system. If the actual speed deviates from the desired speed, the governor takes corrective action to bring it back to the desired level.

In addition to maintaining a constant speed, the CSD Governor also provides overspeed protection. If the engine speed exceeds a certain threshold, the governor will intervene to prevent damage to the engine by reducing the fuel flow or taking other appropriate measures.

Overall, the Constant Speed Drive Governor plays a critical role in ensuring the engine operates at a consistent speed, which is essential for the safe and efficient operation of an aircraft.