Point drag and total drag of navy struts no. 1 modified
A 1923 aeronautical technical report from the NASA Technical Reports Server, presenting wind-tunnel measurements of drag on Navy struts and related shapes for aircraft engineers. The pictures are dense engineering charts: log-scale resistance curves plotted against air speed, pressure distributions along a strut's surface from nose to tail, and theoretical versus observed pressure comparisons. A designer might take from them the restrained grid-and-line vocabulary of technical graphics, with thin black curves, labelled families of lines and tabulated values.
