Investigation of boundary-layer control to improve the lift and drag characteristics of the NACA 65-2 415 airfoil section with double slotted and plain flaps

Elmer A. Horton, Stanley Frank Racisz, Nicholas J. Paradiso
Aug 1950

A two-dimensional wind-tunnel investigation has been made of the relative effectiveness of two methods of boundary-layer control in increasing the maximum lift coefficient of an NACA 65-2 415 airfoil section. Boundary-layer suction was applied at the 45-percent-chord station of the airfoil equipped with a double slotted flap and in the vicinity of the binge line of the airfoil with a deflected plain flap.

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