Lift slope for elliptic wing where downwash is constant Calculator

The lift slope (a) of the elliptical wing is related to the lift slope (a0) of the individual airfoil section from which the wing is constructed and the aspect ratio (AR) of the wing. The lift slope (a) for the entire wing is derived from the lift slope (a0) of the airfoil section but takes into account the effects of the wing’s planform (aspect ratio). The lift slope for an idealized elliptical wing with constant downwash. 

• a is the lift slope for finite wing
• a0 is the lift slope of the airfoil section (also known as the 2D lift curve slope), 
• AR is the aspect ratio of the wing.