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LiquidPiston introduces latest X-series version of HEHC rotary engine; targeting 58% peak BTE, 2 hp/lb power density

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to the thermodynamics, not to a particular engine. Our engine architecture has evolved substantially over time, since 2007. The company expects to transition to the X2 engine for development work probably around the end of the year. Liquid Piston is married to the High Efficiency Hybrid Cycle—e.g.

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