The Stirling engine also needs the temperature gradient to work, but its design means that this can be much lower, so it can run by setting it on a nice cup of tea. That's because it can exploit very ...

Aerospace engineer and content creator Tom Stanton has documented the step‑by‑step construction of a bicycle driven by a Stirling engine, a heat‑powered machine first patented in 1816. The 18-minute ...