What component of an autopilot system applies torque to the control surfaces of the aircraft?

What component of an autopilot system applies torque to the control surfaces of the aircraft?

• A. Gyroscope
• B. Elevator
• C. Servo
• D. Actuator

Answer: (C)

Torque is applied to the control surfaces by the device that converts the autopilot’s electrical command into mechanical motion. The servo is that component, acting as a servo actuator to deliver controlled rotational force to the surface through linkages. It combines a motor, gearing, and feedback so the surface moves to and holds the commanded position with precision. The elevator is the surface itself, not the moving component; the gyroscope is a sensing instrument, not the torque supplier. An actuator is a general term, but in autopilots the servo specifically describes the device that provides the required torque to move the surfaces.

Torque is applied to the control surfaces by the device that converts the autopilot’s electrical command into mechanical motion. The servo is that component, acting as a servo actuator to deliver controlled rotational force to the surface through linkages. It combines a motor, gearing, and feedback so the surface moves to and holds the commanded position with precision. The elevator is the surface itself, not the moving component; the gyroscope is a sensing instrument, not the torque supplier. An actuator is a general term, but in autopilots the servo specifically describes the device that provides the required torque to move the surfaces.