What is the primary function of the Ng Governor?

The primary function of the Ng Governor is to control engine speed, particularly of the fuel-controlled turbine engine in the Pilatus PC-12 NG. It is designed to maintain a specific engine speed by regulating the fuel flow as needed, ensuring optimal performance and efficiency of the engine. This is crucial for the aircraft's operation, as maintaining the correct Ng (gas generator speed) allows for smooth functioning of the engine and helps avoid issues such as over-speeding or under-speeding, which can impact safety and performance.

The Ng Governor achieves this by responding to changes in engine power demands, adjusting the fuel flow to maintain constant engine speed regardless of varying load conditions. This function not only contributes to performance but also enhances the overall safety and reliability of the aircraft.