Duke Engines

[marshall_mosty]

Pretty neat idea...
http://pixelbark.com/13045/how-the-duke-engines-increases-the-efficiency-of-the-internal-combustion-engine

[Rsmith350]

Very cool

[HoustonNW]

LOL, it seems to be a combination of a wankel, radial, and two-stroke engine all in one. Wait, aren't all of those in common use now?

[AllZWay]

That is a pretty crazy looking engine for sure.