Published 06th March, 2015
A tiny W-32 engine works perfectly.
Built by José Manuel Hermo Barreiro, known as Patelo to aficionados, the engine runs so smoothly and precisely that four coins can be balanced on top of it even while it's running.
The engine took 2,520 hours to build, has 850 pieces, 632 screws/bolts and uses a compressed air source to let the engine rev just like its full-sized version.