Aerodynamic characteristics of aerofoils I
A 1921 technical report from the NASA Technical Reports Server, cataloged under its title Aerodynamic Characteristics of Aerofoils I, with no named author beyond the archive itself. Its pages are dense engineering graphs of lift and drag measurements for individual wing sections, meant for aircraft designers and aerodynamics researchers. The three pictures show grids of plotted curves with labelled aerofoil profiles, offering a designer a sense of how early twentieth-century engineers charted performance data.
