What is the primary function of the rudder?

The primary function of the rudder is to control the yaw of the aircraft. Yaw refers to the movement of the aircraft's nose left or right around the vertical axis. The rudder, which is typically located on the vertical stabilizer at the tail of the aircraft, is used to direct this movement. When the pilot pushes on one rudder pedal, the rudder moves in the opposite direction, causing the aircraft to yaw in the desired direction. This is crucial for coordinated flight, particularly during turns, as it helps maintain balance and stability.

In contrast, controlling pitch involves the elevator, which alters the aircraft's ascent or descent by pitching the nose up or down. Managing roll is achieved through ailerons that are located on the wings, which allow for the aircraft to bank left or right. Adjusting the throttle, which refers to managing engine power and therefore speed, is accomplished through the power controls and is unrelated to the rudder’s function. Thus, the use of the rudder is essential for controlling the yaw and ensuring smoother and more effective handling of the aircraft during all phases of flight.