The Resistance of Spheres in Wind Tunnels and In Air
A 1924 technical report by the National Advisory Committee for Aeronautics, issued through NASA's Technical Reports Server, presenting measurements of drag on spheres tested in wind tunnels and in open air for aeronautical engineers. The pictures are black-and-white photographs of testing apparatus, a balance room with a mounted sphere and a precision balance, and a line drawing of a wind tunnel's cross-section, offering a designer plain industrial documentary imagery of 1920s laboratory equipment.
