How does the overspeed governor feather the propeller?

The correct understanding of how the overspeed governor feathers the propeller involves the use of an electric feathering solenoid. In the Pilatus PC-12 NG, when the overspeed condition is detected, the governor utilizes this electric solenoid to initiate the feathering process of the propeller blades. The solenoid works by actuating a mechanism that adjusts the pitch of the propeller blades to a higher angle, effectively reducing drag and allowing for a more aerodynamic configuration of the propeller during an overspeed event.

This method is efficient because it enables automated responses to overspeed conditions, enhancing safety by providing quick feathering of the propeller when needed. The electric solenoid is directly controlled, allowing for rapid adjustments without the need for manual intervention, which is crucial during critical flight situations.

Other methods, such as hydraulic actuators, manual pitch adjustments, or purely mechanical linkages, may not offer the same level of responsiveness and reliability as the electric solenoid in this context. Therefore, the use of the electric feathering solenoid is essential for the effective management of the propeller's operation during an overspeed scenario.