The air propeller, its strength and correct shape
A 1923 technical report on air propeller design, issued through NASA's Technical Reports Server and compiled for engineers studying blade strength and shape. Its pictures are line-drawn engineering diagrams: blade cross-sections with station measurements, curves of thrust and resistance plotted along the blade length, and a tapering propeller blade elevation labelled with dimensions. A designer might take from them the precise, schematic vocabulary of technical plates, with dense labels, dimension ticks and overlapping curves usable as graphic texture.
