1 Kutta-Joukowski Theorem It refers to the lift generated by a rotating cylinder. It is an application of the Magnus Effect which relates the pressure di erence created by a rotating and translating motion of a cylinder through air (moving or still air with respect to ground) Their theorem for lift by a rotating cylinder is given as : Lift per unit area (L) L = rho GV (1) Where: rho = air density G = Vortex Strength G = rho omega R^2 (2) 2 Area Rule As the plane approaches Mach 1 the air moves around it at the speed of sound. the amount of air displaced depends on the cross-sectional area of the aircraft. Now at diff erent point of the wing, the air is at diff erent Mach numbers. Once 1 the air at Mach > 1 collides with air at Mach < 1 it create immense drag. The area rule proposed by Whitcomb reduces this drag by tapering the fuselage near the center of the wing-root. This helping to create larger space for air to ow and reducing the drag. Also by crea...
