Cooling Tests of a Single-Row Radial Engine with Several NACA Cowlings
This is a 1937 NACA technical report by the National Advisory Committee for Aeronautics, issued through NASA's Technical Reports Server, that records wind-tunnel cooling tests of a single-row radial aircraft engine fitted with several different cowlings. Its audience is aeronautical engineers. The pictures show an engine cylinder assembly with labelled parts, the bare engine and cowled engine on a test stand, and a performance chart; a designer could take from them the clean numbered-callout diagram style and the stark mechanical detail of engineering documentation.
