Friction of Compression-ignition Engines
This NACA technical note, issued in 1936 by the National Advisory Committee for Aeronautics, reports on friction in compression-ignition engines and is aimed at engine researchers and aeronautical engineers. Its three pictures are a combustion chamber cross-section drawing with labelled piston-crown positions, a photograph of a single-cylinder test engine set among gauges and piping, and a line graph of friction mean effective pressure against displacer height at three speeds. A designer might take from them the clean, hand-drafted line-and-hatch diagram style and the plain grey-and-white technical plate layout.
