Vorticism in aeronautics
A 1923 technical report from the NASA Technical Reports Server, issued as a scientific paper on aeronautics and the theory of vortices as applied to flight, aimed at engineers and aerodynamicists. Its pictures are line diagrams of airfoil cross-sections, streamlines around wings, vortex pairs and lift curves, drawn in fine black ink on white, with a designer able to borrow their clean flow lines and circular vortex motifs.
