Private Pilot Private Exam

What is the purpose of the rudder on an airplane?

1. To control roll

2. To control pitch

3. To control yaw

4. To control thrust

The correct answer is: To control yaw

The purpose of the rudder on an airplane is to control yaw, which is the left or right movement of the aircraft's nose around its vertical axis. The rudder is a primary control surface located on the vertical stabilizer (tail fin) and is activated by the pilot’s foot pedals. When the pilot applies pressure to the left or right rudder pedal, the rudder deflects in the respective direction, creating a force that alters the aircraft's heading. This function is especially important during coordinated flight and when counteracting adverse yaw during turns. By controlling yaw, the rudder helps to maintain directional stability and control during various phases of flight, such as takeoff, landing, and maneuvering.