Which primary flight control is responsible for controlling tilt or roll?

The primary flight control that is responsible for controlling tilt or roll is the ailerons. Ailerons are located on the wings of an aircraft and function by altering the lift generated by each wing. When one aileron is deflected upward, it reduces the lift on that wing, causing it to drop, while the opposite aileron is deflected downward, increasing the lift on that wing and causing it to rise. This differential movement creates a rolling motion about the aircraft's longitudinal axis, allowing the pilot to control the tilt or roll of the aircraft effectively.

In contrast, the rudder is primarily used for controlling yaw, which is the side-to-side motion of the aircraft. Elevators are responsible for controlling pitch, or the up-and-down attitude of the aircraft. Stabilators, which are a type of all-moving horizontal tail surface, also primarily affect pitch but can influence the overall stability and control of the aircraft rather than specifically facilitating roll. Therefore, the correct answer highlights ailerons as the essential controls for managing roll.