Performance tests of a single-cylinder compression-ignition engine with a displacer piston
This is a 1935 NASA technical report of performance tests on a single-cylinder compression-ignition engine fitted with a displacer piston, prepared for engineers and researchers studying diesel-type engine behaviour. The charts plot indicated, brake and mean effective pressures, fuel consumption, air-flow speed and cylinder pressures against passage width and engine speed, drawn as dense black-line technical graphs with open circle and cross markers on white grid-free paper. A designer could draw on their clean, restrained line-and-marker grammar for minimal data graphics, with the paired solid and dashed curves suggesting a useful comparison format.
