A new method for the prediction of airplane performance
A 1929 NACA technical note on predicting airplane performance, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers. Its pictures are engineering graphs with fine grid lines: curves of speed against altitude, rate of climb against indicated airspeed, and brake horsepower against a straight rising line. A designer might take from them the clean, restrained vocabulary of technical charts, with labelled curve families and plain axes suited to infographic or data-visualisation styling.
