DTIC ADA280302: Aerodynamic Characteristics of Airfoils. Volume 4.
A 1927 National Advisory Committee for Aeronautics report, issued in Washington for aeronautical engineers and designers testing wing sections. Each page tiles four identical panels of fine graph ruling carrying lift, drag and center-of-pressure curves, a small black airfoil silhouette, and a dense numeric data table, offering ready-made technical grid textures, plotted curve shapes and wing profile outlines.
