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
naca-tn-2149
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.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1950/naca-tn-2149.pdf