Inside Out Library · ExploreA Preliminary Study of Flame Propagation in a Spark-ignition Engine (1937)NASA Technical Reports Server (NTRS) · leaf 12figure l.~ Diagrammatic sketch of combustion apparatus.NASA Technical Reports Server (NTRS)Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.More pictures from A Preliminary Study of Flame Propagation in a Spark-ignition EngineMore like this
