Roll is controlled by which axis?

Roll is controlled by which axis?

• A. Horizontal axis
• B. Diagonal axis
• C. Vertical axis
• D. Longitudinal axis

Answer: (D)

Roll is rotation about the aircraft’s longitudinal axis—the line from nose to tail. When you roll, one wing rises while the other lowers, banking the aircraft without turning the nose side to side. This motion is produced by the ailerons, which move in opposite directions to create differing lift on each wing and twist the airplane around that nose-to-tail axis. In contrast, yaw is rotation about the vertical axis (rudder controls this) and pitch is rotation about the lateral axis (elevator controls this). So the axis that controls roll is the longitudinal axis.

Roll is rotation about the aircraft’s longitudinal axis—the line from nose to tail. When you roll, one wing rises while the other lowers, banking the aircraft without turning the nose side to side. This motion is produced by the ailerons, which move in opposite directions to create differing lift on each wing and twist the airplane around that nose-to-tail axis. In contrast, yaw is rotation about the vertical axis (rudder controls this) and pitch is rotation about the lateral axis (elevator controls this). So the axis that controls roll is the longitudinal axis.