Aerodynamic computation of gliders
A 1922 technical paper by Martin Schrenk on the aerodynamic calculation of gliders, issued in translation as a NACA report for aeronautical engineers and glider designers. Line plates pair hand-lettered graph grids of lift and drag coefficients with thin airfoil section profiles and vector diagrams of lift, drag and velocity components, offering stark black-on-white curves, arrows and axis labels.
