Which control surface is responsible for controlling roll in an aircraft?

The control surface that is responsible for controlling roll in an aircraft is the ailerons. Ailerons are located on the outer trailing edges of the wings, and they work in opposition to one another; when one aileron is raised, the other is lowered. This movement creates a difference in lift on each wing, allowing the aircraft to roll to the left or right. As such, pilots use ailerons primarily to execute turns and control the roll axis of the aircraft.

Elevators, on the other hand, are used to control pitch — the angle of the aircraft's nose up or down. The rudder is responsible for controlling yaw, which is the left or right movement of the aircraft's nose. Flaps are primarily used to increase lift during takeoff and landing and do not have a direct role in controlling roll. Understanding the functions of these different control surfaces is crucial for effective flight maneuvers and aircraft operation.