The Altitude Laboratory for the Test of Aircraft Engines
A 1920 technical report from the NASA Technical Reports Server describing the altitude laboratory built for testing aircraft engines under simulated high-altitude conditions, aimed at engineers and aeronautical researchers. The plates include a floor plan of the laboratory and photographs of its test chamber, instrument panels and pressure equipment. A designer could take from them the dense, schematic look of early engineering documentation: labelled plan views, cramped machinery and gauge arrays rendered in fine black-and-white halftone.
