Effect of the Reservoir Volume on the Discharge Pressures in the Injection System of the N.A.C.A. Spray Photography Equipment
This is a 1932 NACA technical report on fuel spray injection equipment, issued by the National Advisory Committee for Aeronautics for engineers studying engine fuel systems. The first two pictures are stem-lift graphs of pressure against time, with a rising and falling curve that a designer could use as a rough model for pulse-shaped data plots. The third is a labelled line diagram of an injection system with valves, a hand pump, a cam and a discharge orifice, showing how fuel lines and fittings were drawn in plain technical schematics.
