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.

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.

Most people haven’t heard of the engine created by Felix Wankel in 1960, but its derivatives may end up powering the military’s future unmanned aerial vehicles, or UAVs.

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 ...

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 ...

The X-Mini engine is a bit similar to a Wankel engine, ... LiquidPiston's first 'X' engine prototype was larger, at 1.2L (up to 220HP), and operated on Diesel in true Compression Ignition mode.