Ignition process in Diesel engines
A 1936 NASA Technical Reports Server record of a technical study on ignition in Diesel engines, issued as a technical memorandum for engineers and researchers of the period. Its pictures are plain engineering graphs with fine grid lines, labelled curves, and axes in units such as degrees, kg/m², and atm, showing ignition delay, fuel vapour pressure against temperature for gasoil and hydrocarbons, and pressure over time for coal dust; a designer might take the clean chart layout, labelled curve families, and spare grid typography as reference.
