The ailerons are the “steering wheel” of the aircraft. They pursue its lateral control, which is the rotation about the longitudinal axis. This movement is called “roll”. The elevator, which is the pivotal control surface, controls the aircraft’s vertical orientation. This kind of orientation is called “pitch” and it stands for the angle between the longitudinal axis and the horizontal plane. Lastly, the rudder is responsible for the vehicle yaw control. This way, it can easily bring the aircraft into alignment, even under a crosswind effect.
From the aspect of engineering, aircraft control refers to the moment adjusting during various phases of the flight. To properly define a moment, the following need to be defined first: the point on which the moment exerts, the axis on which it acts, the force which causes it and the distance between the moment point of reference and the force point of reference.