In flight mechanics and aerodynamics, the moment coefficient associated with control surfaces refers to the change in the aircraft’s pitching moment (rotation around its lateral axis) caused by the deflection or movement of a specific control surface, such as an aileron, elevator, or rudder. Control surfaces are movable parts on an aircraft’s wings and tail that pilots use to control its attitude, stability, and direction.
- C‟mcgt: This likely represents a moment coefficient related to the control surfaces of the aircraft. The notation suggests that it might be a derivative of the moment coefficient with respect to some parameter.
- VH: This could represent the horizontal tail volume or a similar parameter related to the tail surfaces of the aircraft.
- η: This could be an efficiency factor or a control effectiveness factor associated with the control surfaces.
- CLt: Coefficient of lift for the tail surfaces.