High velocity wind tunnels : their application to ballistics, aerodynamics, and aeronautics
A 1925 technical report on high-velocity wind tunnels, issued by a national aeronautics research body (NASA Technical Reports Server record, originally a 1925 aeronautical memorandum) for engineers studying ballistics and aerodynamics. Its pictures are plain, measured photographs and line diagrams: shock-wave photographs of shells and rods, sound-wave schlieren images, bullet profile sketches, and experiment layouts with dimensions. A designer could take the stark black-on-grey photographic contrast and the clean dimensioned technical drawings as models for functional, instrument-like graphics.
