75 percent thermal efficiency engine.

[hassanbakar123]

LiquidPiston unveils 40-bhp X2 rotary engine with 75 percent thermal efficiency (http://www.gizmag.com/liquidpistol-rotary/24623/)

[Matej]

This is quite interesting. Wonder how big it would need to be to power a regular size car, and if it would still be as efficient.

[driftracerx]

wow thats pretty cool

[DenkiMan!]

in scooters and smaller applications like lawnmowers or something, this particullar would be perfect. but cars? obviously itd need to be bigger with higher power output, but wouldnt that also mean it would sacfrice efficiency the bigger it gets? unless there are a couple of them powering the same thing...idk this is really interesting though!