It's been a while, and LiquidPiston even tried a 2-stroke Diesel prototype, still based on its inverted Wankel design. Sure trying to sell such engines for military applications, not only gensets but also UAVs and eventually outboard motors too, might generate a spontaneous marketing just like the Jeep after WWII, but LiquidPiston is wasting time not making some 2-rotor and 3-rotor engines which could cater to the Mazda fanbase as a crate engine, and for general aviation to compete with those flat-4 and flat-6 gassers too.
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