Wind-Tunnel Investigation of Air Inlet and Outlet Openings for Aircraft, Special Report
This is a 1938 technical report from the NASA Technical Reports Server on wind-tunnel testing of air inlet and outlet openings for aircraft, issued as a special report for aeronautical engineers. The two photographs show test setups: a boxed model mounted in a wind tunnel with an oval window, and a cylindrical drum-shaped component with a drive unit beside it in a workshop. A designer could take from them the raw industrial look of 1930s laboratory apparatus, with plain wooden panels, exposed piping, and high-contrast grey photography.
