Since it looks like Mazda may very well revive the Wankel rotary ... of a flathead engine. This new video shows off the rotary engine by adding a clear side to a tiny model-airplane engine ...

Jeep Grand Cherokee Trackhawk-beating RX-7 build was already crazy, to begin with, Rob Dahm has just received something even crazier. We're talking about a 12-rotor Wankel engine, given to Dahm by ...