The light airplane : modern theoretical aerodynamics as applied to light airplane design with a series of charts
A 1925 NACA technical memorandum on light airplane design, issued by the National Advisory Committee for Aeronautics for aircraft engineers, and reproduced from a NASA Technical Reports Server scan. Its pictures are plain engineering charts with labelled grid axes and family curves for a 500 pound light airplane, showing take-off run, angle of climb and time to climb against span loading and horsepower. A designer could take from them the clean, restrained language of technical graphs: thin black curves, gridded plots and sparse labels.
