Duke Engine - looks promising

[niky]

Not meant for automotive applications.

As a standalone power generator, a small piston-powered engine is one of the worst ways to do it. For economical power generation, you're looking at doing large scale diesel installations first, since those produce lots of electricity at low revs.

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Right on the Duke website, they claim automotive applications, aviation, marine and range-extender applications.

They also claim friction levels are comparable to regular piston engines.

Sounds great... and since the engine's operation is more akin to two-stroke than four-stroke, power levels should be higher... but I'll believe it when I see it. The design should naturally lend itself to higher hydrocarbon production and oil usage over time... so it remains to be seen if traditionally conservative aircraft and automobile manufacturers will be willing to take a gamble on something so odd.