The calculated performance of airplanes equipped with supercharging engines
This is a 1921 NASA technical report, issued through the NASA Technical Reports Server, presenting calculated performance figures for aircraft fitted with supercharged engines, aimed at aeronautical engineers. The pictures are engineering charts: line graphs of reduced thrust horsepower against reduced speed of advance, a horsepower-ratio chart plotted against exhaust back pressure, and a family of curved plots of a coefficient against a Reynolds-style parameter. A designer could take from them the restrained look of plain black plot lines, gridded axes, and small serif labels on white paper.
