Staggered configuration for wankel engine spark plugs

Abstract From the Canadian patent

A rotary internal combustion engine is disclosed having circumferential type cooling circuit for the rotor housing and a plurality of spark plugs extending through the trochoid wall of the rotor housing at a vertically rising zone of said circuit. The plugs are contained by bosses extending through the coolant flow passage; the bosses are arranged to stagger the up-stream sides of said bosses with respect to controlled flow of coolant thereabout thereby, increasing flow control, increasing heat transfer and, preventing a collection of vapor which may act as an insulation film hindering heat transfer between said bosses and coolant flow. The centerline of said bosses are preferably skewed …