What part banks the airplane?

Answer 1

Ailerons are hinged control surfaces attached to the trailing edge of the wing of a fixed-wing aircraft. The ailerons are used to control the aircraft in roll. The two ailerons are typically interconnected so that one goes down when the other goes up: the downgoing aileron increases the lift on its wing while the upgoing aileron reduces the lift on the other wing, producing a rolling moment about the aircraft's longitudinal axis. The word aileron is French for "little wing." The ailerons are control via the control column inside an aircraft's cockpit. If the control column is turned right, for example, then the right wing aileron will move upwards and the right wing will move downwards and the left wing aileron will move downwards and the left wing will lift, and the aircraft will roll right. On the tail of a fixed wing aircraft, the rudder is also used to conter-act the unwanted yaw, and is controlled by the foot pedals inside the cockpit. When the aircraft is rolled right using the ailerons, the rudder is turned right to help the aircraft begin its turn. The parts that help to bank the airplane are called the ailerons (on the wing next to the 'flaps') and the rudder (on the tail under the 'elevators').

Answer 2

The wings of an airplane bank to allow it to turn left or right by tilting the wings in the desired direction. This banking motion creates a horizontal component of lift that changes the direction of the aircraft.