The Effect of Clearance Distribution on the Performance of a Compression-ignition Engine with a Precombustion Chamber
A 1932 NACA technical note on compression-ignition engine research, issued by the National Advisory Committee for Aeronautics for engineers and aviation designers, examining how clearance volume is split between a precombustion chamber and the cylinder. The pictures are plain engineering line drawings of a combustion chamber cross-section with labelled fuel valve and piston crown, a set of pressure-versus-speed curves on gridded charts, and a black-and-white photograph of a laboratory engine test rig with gauges and piping, offering a designer clean technical diagram conventions and measured data plotting.
