What is the primary function of ailerons on an aircraft?

The primary function of ailerons on an aircraft is to control roll. Ailerons are located on the trailing edge of each wing and operate in opposition to one another. When one aileron is deflected upward, the other is deflected downward, which creates a difference in lift between the two wings. This differential lift causes the aircraft to roll to the side of the wing with the aileron that is deflected downward.

This roll control is crucial for maneuvering the aircraft, especially during turns. By controlling the roll, pilots are able to change the aircraft's orientation and direction in flight effectively. Understanding the function of ailerons is fundamental for grasping how aircraft handle aerodynamic forces during various flying conditions and maneuvers.