Aircraft and systems
Ailerons
Aileron
At a glance
Meaning of Ailerons
Wing control surfaces primarily used to control roll.
More about Ailerons
Ailerons normally move in opposite directions, changing lift on the two wings and producing a rolling moment.
Their action may be supplemented by spoilers or other controls. Roll, yaw and the aircraft's resulting turn interact, so aileron movement alone does not describe the entire manoeuvre.