In flight mechanics and aircraft dynamics, the change in the aircraft’s pitching moment coefficient (Cmc) due to a shift in the center of gravity (CG) refers to how the aircraft’s longitudinal stability is affected when the position of its center of gravity is moved forward or backward along the longitudinal axis.
- Cmacw: This is the pitching moment coefficient at the aerodynamic center (AC) of the wing. It is a measure of the wing’s contribution to the aircraft’s pitching moment.
- Clw: This represents the lift coefficient of the wing. It is a measure of the wing’s lift-producing characteristics.
- Xcg: The position of the aircraft’s center of gravity along the longitudinal axis, typically measured from the leading edge of the wing.
- Xac: The position of the aerodynamic center (AC) of the wing along the longitudinal axis, also typically measured from the leading edge of the wing.
- c: The mean aerodynamic chord of the wing. It is the average chord length of the wing and is used as a reference for various aerodynamic calculations