Determination of the profile drag of an airplane wing in flight at high Reynolds numbers
This NACA-era aeronautical technical report from 1939, issued by the National Advisory Committee for Aeronautics and preserved through the NASA Technical Reports Server, presents measurements of profile drag on an airplane wing flown at high Reynolds numbers for engineers and researchers. Its pictures show a smooth-finished wing mounted on a test aircraft with a survey apparatus, close views of the surface with rivet rows and panel seams, and a chordwise pressure or contour plot with marked points along the airfoil, which a designer could use for sleek mechanical surface textures and aerodynamic line study.
