Recorders which exhibit the performance of a steam, gasoline or other expansible gas engine in terms of multiple parts of the engine or of a part operative in synchronism with the engine, i.e., one function of the engine (e.g., spark) should be plotted against another function of the engine (e.g., shaft rotation).
SEE OR SEARCH THIS CLASS, SUBCLASS:
45+, for other plural function recorders.
SEE OR SEARCH CLASS
73, Measuring and Testing,
115, for apparatus for testing engine performance or efficiency having means to record.
