What are the primary types of servos used in aircraft operations?

The primary types of servos used in aircraft operations are primarily categorized based on their directional movement and functionality. In this context, the terms forward, aft, and lateral relate to the movement and operation of the servos within the aircraft's flight control systems.

Forward and aft servos are responsible for controlling the movement along the aircraft's longitudinal axis, allowing for pitch control. Lateral servos are focused on the movement across the aircraft's lateral axis, providing roll control. This triad of directional control is essential for maneuverability and stability during flight, ensuring that the aircraft can respond effectively to pilot inputs and maintain controlled flight paths.

The other options present different combinations of directional terms that do not accurately reflect the primary functions of servos as recognized in aircraft operations. Understanding the roles of forward, aft, and lateral servos is crucial for any individual involved in aircraft handling and maintenance, as these elements directly influence the aircraft's performance and control in various flight scenarios.