Application of the theory of free jets
A 1932 NASA technical report, a scientific paper on applying free-jet theory to fluid flow, issued for engineers and aerodynamics researchers. Its three pictures are technical diagrams: a flow-through-screen sketch with streamlines, a dimensionless coefficient chart of curves against a ratio axis, and an experimental setup drawing of a nozzle and bar section with dimensions. A designer could draw on their clean line-diagram style, with flowing streamlines and labelled dimension callouts.
