Pitching moment coefficient (Cm) is a dimensionless parameter that relates the pitching moment of an aircraft to various factors affecting its stability and control. It is an important aerodynamic coefficient used to understand how the aircraft behaves in pitch (upward or downward rotation) around its lateral axis.
- is the pitching moment acting on the aircraft. It is a moment around the lateral axis and is influenced by various force and moments acting on the aircraft’s control surfaces, wings, and body.
- is the air density.
- is the true airspeed of the aircraft.
- is the reference area, typically the wing area.
- is the mean aerodynamic chord of the wing.