there are three primary ways for an aircraft to change its orientation relative to the passing air. "pitch" (movement of the nose up or down, rotation around the transversal axis), "roll" (rotation around the longitudinal axis, that is, the axis which runs along the length of the aircraft) and "yaw" (movement of the nose to left or right, rotation about the vertical axis). turning the aircraft (change of heading) requires the aircraft firstly to roll to achieve an angle of bank (in order to produce a centripetal force); when the desired change of heading has been accomplished the aircraft must again be rolled in the opposite direction to reduce the angle of bank to zero. lift acts vertically up through centre of pressure which depends on the position of wings. the position of the centre of pressure will change with changes in the angle of attack and aircraft wing flaps setting.