Question

Which control surface is mainly used to control the yaw motion of an aircraft?

• A. Aileron
• B. Elevator
• C. Rudder
• D. Flap
• E. Trim Tab

Hint:

Match the surface to the axis:
Rudder $\rightarrow$ Vertical Axis (Yaw).
Elevator $\rightarrow$ Lateral Axis (Pitch).
Aileron $\rightarrow$ Longitudinal Axis (Roll).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
To control the orientation of an aircraft in 3D space, pilots use primary flight control surfaces to rotate the aircraft about its center of gravity.
Step 2: Detailed Explanation:
There are three primary control surfaces:
1. Ailerons: Located on the outboard trailing edge of the wings. They move in opposite directions to roll the aircraft about its longitudinal axis.
2. Elevators: Usually located on the trailing edge of the horizontal stabilizer. They move up or down to control the pitch of the aircraft about its lateral axis.
3. Rudder: Located on the trailing edge of the vertical stabilizer (the "fin"). It moves left or right to control the yaw of the aircraft about its vertical axis.
The rudder is operated by the pilot's feet via pedals and is essential for coordinated turns and managing crosswinds.
Step 3: Final Answer:
The Rudder is the surface used to control yaw motion.