Normal force by Lilienthal Calculator

In aerodynamics, the normal force (often denoted as N) is a fundamental force that acts perpendicular to the surface of an object in a fluid flow, such as air. It is one of the four aerodynamic forces, along with lift, weight (gravitational force), and drag, that play a crucial role in the behavior and motion of an aircraft or any other object moving through a fluid. 

• N is the normal force 
• 0.13 is the Smeaton’s coefficient 
• η is the normal force coefficient 
• F is the Planform Area 
• V is the freestream velocity