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Useless’s workshop notes: engines, explained by half an eraser

Lenoir’s engine turned only about 4 percent of its fuel into work. I turn about 4 percent of myself into crumbs every lesson, so I know how it feels.

— U. (tap me for another)

Thanks for visiting. The facts are checked; the jokes are Useless.

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engines.motoring.im is part of the ReallyByte network, run by REALLYBYTE, based in the Isle of Man. Facts are checked against Encyclopaedia Britannica, the US Department of Energy (fueleconomy.gov and the Alternative Fuels Data Center) and NASA Glenn Research Center, listed on the sources page (checked 3 Nov 2026). The charts, drawings and games are our own; photos and portraits are public domain or CC0, credited. Not affiliated with or endorsed by any of those organisations. As an Amazon Associate I earn from qualifying purchases. No cookies; privacy-friendly visit counts via GoatCounter. Privacy | Contact

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