Lift and Drag Characteristics of a Low-drag Airfoil with Slotted Flap Submitted by Curtiss-Wright Corporation

Ira H. Abbott

gen 1941 · National Advisory Committee for Aeronautics

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A 24-inch chord wooden model equipped with a slotted flap (submitted by the Curtiss-Wright Corporation) was tested in the Langley two-dimensional tunnel. The model represented a wing section of the P-60A airplane and was of, or approximately of, the NACA 66,2-18 section. The model was equipped with a 0.25c slotted flap with the lip on the upper airfoil surface at approximately 90 percent of the airfoil chord. This flap deflected in such a manner as to keep the slot closed until a deflection was normally 30 degrees with an actual limit of 32.5 degrees set by the model construction. The model was equipped with pressure distribution orifices.