The Effect of Increased Carburetor Pressure on Engine Performance at Several Compression Ratios
A 1933 NASA technical report on how raising carburetor pressure affects engine performance at several compression ratios, issued as an engineering study for aviation engine researchers. Its pictures are plain graph plots of corrected horsepower, mechanical efficiency and brake thermal efficiency against carburetor pressure in inches of mercury, with a grey photograph of a test-stand engine fitted with a supercharger; a designer might take the clean grid-and-curve layout and the labelled test rig as reference for technical charts.
