Wankel rotaries should be compared to 2 stroke engines and turbines, not just 4 strokes. Mazda was one Japanese outfit that built them for their purposes, others made jetskis and snowmobile engines, small aircraft engines. Norton in England has their motorcycle running around- often with police officers on them and NSU had their cars. Curtis-Wright bought early license for rotaries in US "Transportation" market while GMhad purchased license later for Brazillian market. The GM publicity about selling rotary engined cars in US in original Vega bodies got a letter from the Curtis -Wright lawyers saying OK, but it will cost you a good chunk of cash for every one you sell since we bought a license earlier for this market area and several laws and case laws regarding license and patents means we"ll win if we have to take you to court- this letter will also cost you the legal notice fee, pleas pay in 10 days or court service will start in 12 days with seizure of all product in dispute. GM paid for lettter and squeezed V6 in Buick body shell-had to buy tooling previously sold to Kaiser back from AMC, Pontiac got old Iron Duke in their shell and vega got a hood bulge for their short life cylinder engine. Ford has done some research in partnership with old Curtiss licensee and Mazda, some compresor research has gotten some return. Rotax and Norton motorcycle engines were originally classed with 2 stroke engines and used a 2 stroke fuel/oil mix for extended tip seal life, Kaw jet skis also used outboard mix until EPA got real picky. Fuel economy down for EPA as quickest way to meet standards was afterburner before cat in cars. Original Wankel idea was afterburner feeding extra turbine blade for airplane engine similar to early Coanda hibred engine or the current marine combination diesel engines with coupled low pressure turbine. Works- but the cost of compressor and turbine goes up higher than market competion for most applications. Mazda had a good run, won a few races and got some R&D knowledge, got some good advertising to help sell some other models. RN
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Today's Featured Article - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe.
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