Notes on the technique of landing airplanes equipped with wing flaps
A 1936 NACA technical note on landing airplanes fitted with wing flaps, issued by NASA's technical reports archive for aeronautical engineers and pilots. The single plate shows side-view diagrams of aircraft on approach paths, with flight trajectories drawn as curved lines above a runway line and small annotated formulas and labels beside each case. A designer could draw on its clean monochrome technical-diagram style, with thin ink lines, dashed flight paths, and simple labelled schematics of aircraft in descent.
