The Interference Effects on an Airfoil of a Flat Plate at Mid-span Position
This is a 1931 NACA technical note, published by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers, reporting wind-tunnel tests of an airfoil with a flat plate mounted at mid-span. The first plate shows a photographed airfoil mounted on a sting in the tunnel, with the plate and fillets visible as dark metal and shadowed surfaces. The second is a plotted chart of drag coefficient against lift coefficient, with curves in fine black lines on squared paper, offering a clean reference for technical graph styling.
