Longitudinal axis is an imaginary line running through the center of gravity (CG), and is horizontal, when the aero plane is in the attitude of normal horizontal flight. Any rotary motion about this axis is called rolling.
02. NORMAL AXIS AND YAWING
Normal axis is straight line through the CG and it is vertical when the aero plane is in the attitude of normal horizontal fight any rotary motion about this axis is called yawing.
03. LATERAL AXIS AND PITCHIN
Lateral axis is a straight line passing through the CG, and right angles to the other axis. It is horizontal when the aero plane is in the attitude of normal horizontal flight and is parallel to the straight line joining the wing tips. Any rotary motion about axis is called pitching.
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