Wing design for spin resistance

Use of a discontinuous outboard wing leading edge to improve stall/spin characteristics has been evaluated through wind-tunnel and flight tests. Addition of such a discontinuous outboard wing leading-edge droop design to three light airplanes having NACA 6-series airfoil sections produced significant improvements in stall characteristics and spin resistance. The increased spin resistance of the modified airplanes has been related to the difference in angle of attack between the outer wing panel stall and the maximum attainable angle of attack.