The Design of Wind Tunnels and Wind Tunnel Propellers
A 1919 technical report on the design of wind tunnels and their propellers, issued through NASA's Technical Reports Server for aeronautical engineers and researchers. Its pictures are plain graph plots of air speed against distance from the tunnel axis, a dense contour chart, and photographs of tunnel equipment and test rigs, offering a designer stark black-and-white engineering diagrams with fine grid lines and labelled curves.
