What type of servos may small aircraft autopilots use?

Small aircraft autopilots typically utilize servos that are either pneumatic or electrical in nature. Pneumatic servos use air pressure to create motion and control surfaces, making them lightweight and reliable for various flight control applications. On the other hand, electrical servos are more common in modern aircraft systems due to their efficiency, ease of use, and greater precision. They convert electrical signals into mechanical movement, allowing for a more direct and responsive control of the aircraft's autopilot functions.

In practice, pneumatic servos may be advantageous in some conditions where weight and simplicity are critical, while electrical servos are favored for their advanced capabilities and integration with digital avionics systems. This combination of pneumatic and electrical servos provides the necessary flexibility and performance required in small aircraft autopilot systems, making them suitable for a range of aircraft and operational scenarios.