Wind Tunnel of the Bucharest Polytechnic Institute
This is a 1931 NASA Technical Memorandum, No. 651, reproducing engineering drawings and photographs of the Bucharest Polytechnic School wind tunnel, issued for aeronautical engineers and researchers. The sectional elevations, floor plan and exterior photographs document the tunnel's layout, duct geometry and structural framing in plain technical plates. A designer could take from them the stark, orderly logic of large industrial structures, with repeated truss bracing, octagonal intake forms and boxy housings rendered in sepia.
