What is the primary function of the rudder on an aircraft?

The primary function of the rudder on an aircraft is to control yaw. The rudder is a vertical control surface located on the tail of the aircraft and is used to manage the side-to-side movement of the aircraft's nose. When the pilot applies pressure to the rudder pedals, the rudder moves left or right, which helps to offset the yawing motion that can occur due to the asymmetrical lift and drag experienced during flight, especially during turns.

Controlling yaw is essential for maintaining coordinated flight. In conjunction with the ailerons, which control roll, and the elevator, which controls pitch, the rudder allows pilots to maneuver the aircraft more effectively and ensures stability during various phases of flight. By managing yaw, the rudder plays a crucial role in maintaining proper flight dynamics and ultimately contributes to the overall safety and performance of the aircraft.