The yawing moment coefficient (Cn) is a dimensionless aerodynamic parameter that describes the rotational force, or moment, experienced by an airfoil or a wing around its vertical axis when subjected to a sideslip angle in an airstream. The yawing moment coefficient provides insight into how an aircraft responds to yawing motion. A positive indicates a stabilizing effect, meaning the aircraft tends to return to its original heading when disturbed. A negative implies a destabilizing effect, potentially leading to uncontrolled yawing motion. The formula to calculate Yawing moment Coefficient as follows :
Where:
- = yawing moment coefficient (dimensionless)
- = yawing moment (N·m)
- = air density (kg/m³)
- = velocity of the airflow (m/s)
- = reference area (m²)
- = wingspan (m)