The force per unit span () on the top surface of a wedge refers to the aerodynamic force exerted on a unit span length of the top surface of the wedge-shaped body when it is exposed to a fluid flow. This force is usually perpendicular to the direction of the incoming flow and can be decomposed into components such as lift and pressure forces.
- Pressure on the top surface of the wedge (p2) in N/m^2
- Length of the face of the wedge (l) in m
- Force per unit span (F2′) in N/m