The pitching moment coefficient is a dimensionless parameter that represents the aircraft’s tendency to rotate around its lateral (pitch) axis due to changes in angle of attack. It’s defined as the ratio of the pitching moment to the dynamic pressure, reference area, and reference length.
Cmcg = (Mcg / (0.5 * ρ * v^2 * S * c))
where:
- Mcg is the pitching moment acting on the aircraft.
- ρ is the air density.
- v is the airspeed.
- S is the reference area, often the wing area.
- c is the reference length, often the mean aerodynamic chord.