The “resultant force per unit span,” often denoted as , refers to the net aerodynamic force acting on a unit span length of a body, such as an airfoil or wing, in aerodynamics and fluid dynamics. This force takes into account both the lift force and the drag force experienced by the body as it interacts with the surrounding fluid flow.
- Resultant force per unit span (R’) in N/m
- Pressure on the bottom surface (p3) in N/m^2
- Pressure on the top surface (p2) in N/m^2
- Flat plate of length (c) in m