Pick up the nearest book, turn to page . What are the first complete sentences on the page?

Question

Pick up the nearest book, turn to page . What are the first complete sentences on the page?

Answer

The location of the aerodynamic center of an airfoil is not affected by camber, thickness, and angle of attack. In fact, two dimensional incompressible airfoil theory will predict the aerodynamic center of the percent cord point for any airfoil regardless of camber,brthickness, and angle of attack. Actual airfoil, which are subject to real fluid flow, may not have the lift due to angle of attack concentrated at the exact percent chord point. However, the actual location of the aerodynamic center for various sections is rarely forward of the percent or aft of the percent cord point. The moment about the aerodynamic center has its source in the relative pressure distribution and requires application of the coefficient form of expressions for proper evaluation.