Which component is located on the back of the tail and controls yaw?

• A. Rudder — located on the back of the tail and controls yaw.
• B. Servo — a small electro-mechanical device that deflects control surfaces.
• C. Canard — the horizontal tail near the nose.
• D. Propeller — provides propulsion.

Answer: (A)

Yaw control is achieved with the rudder, the movable surface on the trailing edge of the vertical tail fin. When the rudder deflects, it alters the airflow around the tail, creating a yawing moment that makes the aircraft rotate left or right around its vertical axis. The rudder sits on the back of the tail, which is why it’s the component that controls yaw. The other options serve different roles: a servo is the actuator that moves surfaces; a canard is a forward horizontal stabilizer that mainly affects pitch and stability; and a propeller provides thrust for propulsion.