Research and Design Problems Introduced by Increased Power Output
An NACA technical memorandum from 1937 on aircraft engine research and design problems, issued by the NASA Technical Reports Server collection for aeronautical engineers. The pictures are plain line diagrams of piston and valve timing curves, altitude performance charts, and a photograph of a test stand for an air-cooled engine. A designer might take from them the clean graph layouts and technical diagram conventions of mid-century engineering reports.
