Any oddball engine is clickbait crack for mechanical nerds, and the most compelling ones purport to introduce an entirely new combustion concept. "Not a four-stroke, not a two-stroke, a revolutionary ...

With a slogan like “The Future is Ecclectic,” we’d expect some interesting things from INNengine, a startup based in Spain. The company is showcasing a “one-stroke” engine that works as an opposed ...

When INNengine's designs first made headlines in February 2023, I tried to talk to the Spanish company. I never heard back from them, something I saw as a sign not to insist on learning more about ...

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