Influence of several factors on ignition lag in a compression-ignition engine
This is a 1932 NASA technical report on ignition lag in a compression-ignition engine, issued by the NASA Technical Reports Server collection for engineers and researchers. Its pictures are plain engineering graphs and cross-section line drawings: one plots ignition lag in degrees against injection advance with fine grid lines and a legend of fuel quantities, the other shows combustion chamber sections with hatched cast metal, spacer rings and a pressure element location. A designer could borrow the restrained monochrome technical-diagram style, with its clean hatching and labelled callouts.
