Engines and propellers for powered gliders and light airplanes
This 1938 NACA technical report, issued by the National Advisory Committee for Aeronautics, gives engineering data on engines and propellers for powered gliders and light airplanes. Its pictures are dense technical charts of power, weight, speed and propeller efficiency plotted as curves and scattered data points on gridded axes, with a designer able to take from them only a sense of the restrained graph styling of 1930s aeronautical engineering publications.
