Downwash and Wake Behind Plain and Flapped Airfoils
A 1939 NASA technical report on aerodynamics, issued by the NASA Technical Reports Server collection, presenting measured downwash and wake data for plain and flapped airfoils for engineers and researchers. The single plate shows three stacked airfoil profiles, each with dashed curved contour lines fanning out behind and below the wing, labelled with angle values and a vertical axis reading distance from the quarter-chord point. A designer might borrow its clean technical plotting style, with thin dashed isolines radiating from a crisp line profile, for diagrammatic or scientific graphics.
