Youtuber Aliaksei Zholner built a very small one cylinder machine out of paper. And then he opens it to show us his news, even more tiny paper-machine. And it is even working!
In operation, the sound of this papercraft wonder is a bit of a shocker. You are forgiven if your first thought is: That sounds like a REAL engine. It is a real engine!
“The model is completely made of paperLxWxH: 18 x 13 x 22 mmShaft diameter: 0.5 mmPiston stroke: 3 mmCylinder diameter: 3 mm“Swept volume”: ~ 21 mm3″
The crankshaft itself is made of a paper axis and cardboard knees, all folded by hand, and bounded together with superglue.