I am currently working on my third engine, after my 1st and 2nd attempts failed miserably… I thought my third engine would run. I thought wrong. It was airtight, it turned smoothly but it seemed that the piston didn’t had strength enough to turn the cranks. Maybe I made the piston too big for the small tuna can? So there is little air to lift the balloon?
If somebody knows the answer, let me know. For know I am going to try and find a smaller cylinder for my piston.
…maybe I have some reading to do about piston sizes…
…and maybe it wasn’t so airtight after all. It got condensation in the cylinder of the displacer, so that’s not good. Back to the drawing board! Maybe someday I’ll have one running like this solar one or this solar powered lamina flow engine.
Buy a paper stirling engine
If you want to learn the basics of a stirling engine but unfortunately you have -like me- three left hands, you can always buy a cheap low-temperature engine. Take a look for example at some cheap low temperature engines on Amazon or eBay.