Discharge characteristics of a simulated unit injection system
A 1938 NASA technical report on discharge characteristics of a simulated unit fuel injection system, issued from the NACA-era technical report series for engine researchers and engineers. Its pictures are plain engineering graphs of pump degrees against fuel quantity, rate of displacement and plunger velocity, plus a line-drawn injector valve cross-section; a designer might borrow the clean grid-and-curve layouts and the sectioned hardware drawing for technical diagram styling.
