They've apparently created a https://en.wikipedia.org/wiki/Wankel_engine
It is a rotary engine but it is distinct from the Wankel rotary engine.
How so? Looks the same to me.
LiquidPiston: Efficient rotary engine
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Re: LiquidPiston: Efficient rotary engine
#22I'm very confused why the name of the company is LiquidPiston, when their primary product appears to be a rotary engine, not an actual liquid piston engine. Was there a pivot or a previous product? Does anyone know?
For examples of actual liquid piston engines, see:
https://en.wikipedia.org/wiki/Fluidyne_engine
https://en.wikipedia.org/wiki/Humphrey_pump