Description of the NACA Universal Test Engine and Some Test Results
A 1927 NACA technical report describing a universal test engine and its results, issued by the NASA Technical Reports Server collection for engineers and researchers. The pictures are plain black-and-white engineering photographs and cutaway drawings of an engine's gear train, crankshaft-side hardware and cylinder cross and longitudinal sections, labelled with part names such as head and barrel jacket guide. A designer could draw on their clean technical line work and precise part-labelling as a model for mechanical diagrams.
