Which control surface is responsible for changing the yaw of an aircraft?

The rudder is the control surface that directly influences the yaw of an aircraft. Yaw refers to the rotation of the aircraft around its vertical axis, allowing it to pivot left or right. The rudder is typically mounted on the vertical stabilizer at the tail of the aircraft, and when the pilot inputs a command to move the rudder, it deflects air, creating a side force that turns the aircraft in the desired direction.

For example, when the rudder is deflected to the right, it pushes the tail of the aircraft to the left, causing the nose to yaw to the right. This is crucial for coordinated turns and maintaining control during flight. Understanding the function of the rudder is essential for pilots as it aids in maintaining proper balance and functionality of the aircraft during maneuvers.

Other control surfaces, such as the elevator and ailerons, serve different purposes. The elevator changes pitch, affecting the aircraft's ascent or descent, while the ailerons control roll, enabling the aircraft to bank left or right. Flaps, on the other hand, are primarily used to increase lift during takeoff and landing but do not directly affect yaw.