DETROIT, MI -- The buzz at the SAE 2008 World Congress here was over a water-lubricated external combustion engine that uses steam to power automobiles, lawn mowers and stationary generators. Known as ...

The Wankel engine powered the Mazda RX-7 to fame, but other pistonless rotary designs reveal why the category is broader than ...

In theory, Wankel-style rotary internal combustion engines have many advantages: they ditch the cumbersome crankcase and piston design, replacing it with a simple, single-chamber design and a thick, ...

When the Chevrolet Monza debuted for the 1975 model year, it was originally intended to showcase one of the most ...

We're not going to get into the whole "who made the first car" argument today. But there's not much doubt that the overall history of self-propelled vehicles goes back well beyond the Mercedes Patent ...

Astron aerospace has shown a partial prototype of a new rotary combustion engine it claims runs at an extraordinary 60% thermal efficiency, burning totally clean with zero NOx emissions and nothing ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

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The rotary engine is unique in its success and failure and its ability to make an impact with a completely different way of thinking. As it is, every production car for the last 130 years, aside from ...