Though the rotary diesel never really got beyond the prototype stage of development in the past, the concept has merit. It's a lightweight, compact engine with a good power-to-weight ratio.

The traditional Wankel is limited to 12:1, the liquid piston x-engine is not. That’s why they can run diesel, like in their XTS-210 compression ignition engine. Still, it’s not perfect.

LiquidPiston says its new XTS-210 solves the efficiency, lubrication and fuel type issues of Wankel rotary engines. This supercharged, liquid-cooled two-stroke claims 5X the power of an equivalent ...

The manufacturer says that it reduced the size and weight of a modern diesel engine by around 80%, which puts this small 42-pound motor on par with the size of a basketball.

Back in the 1970s, Wankel engines were the future. Lots of companies—Mazda, Mercedes-Benz, and GM among them—invested in rotary research, and even Rolls-Royce got in on the fun. Yes, the world ...

In the case of the Rolls-Royce Wankel Diesel, the fuel-air mixture is first compressed by the lower rotary, and the output of that engine (which would be like the exhaust valve of a conventional ...

So, a Wankel engine needs constant oil top-ups while dealing with the products of that burnt oil. And those apex seals wear down. "[The Wankel] has this long, skinny, moving combustion chamber.

The developer of a line of advanced rotary diesel and multi-fuel internal combustion engines is expanding into the renewable energy game. LiquidPiston's X-Engine, which we've covered previously ...

Hell, even the Wankel is pretty wild compared to your typical cylindrical piston-powered mill. But none can compare to the mechanical majesty of the Napier Deltic diesel.

There’s a new spin on the rotary engine. Liquid Piston, a Connecticut-based engineering firm, has turned the classic Wankel engine design inside out to create a more efficient, and cleaner ...