Aeromodelling

When the fixed wing aircraft airborne, control surfaces of the aircraft allows pilot to adjust and control the flight attitude. The aircraft rotational motion is in three-dimensional space. It will rotate about the three imaginary axes. These three imaginary axles are intersected at the center of gravity at right angles to each other.

Longitudinal Axis: The imaginary line that extends lengthwise through the fuselage, from nose to tail, is the longitudinal axis. Motion about the longitudinal axis is roll and is produced by movement of the ailerons located at the trailing edges of the wings.

Lateral Axis: The imaginary line which extends crosswise, wing tip to wing tip, is the lateral axis. Motion about the lateral axis is pitch and is produced by movement of the elevators at the rear of the horizontal tail assembly.

Vertical Axis: The imaginary line which passes vertically through the center of gravity is the vertical axis. Motion about the vertical axis is yaw and is produced by movement of the rudder located at the rear of the vertical tail assembly.