Hey i have built an alpha type stirling engine using two honda 70cc cylinders and their pistons. Using the same crankshaft (modified it to have two connecting rods). The problem is that it does not run not matter how much heat i provide it does not spin more than 2-3 rpm by rotating the flywheel by hand while heating and friction b/w pistons is not that much, less than the normal engine because i have done some finishing and leakage is the same as in any motorcycle engine cylinder due to same rings and arrangement. I got the design from a video on youtube (https://www.youtube.com/watch?v=u_b8tB54Zj8) and tried to build it according to the design and availability of resources. I am using iron chips from lathe machine in regenerator. Here are some of its pictures
Please suggest some improvements and what could go wrong with the engine.
Discussion on Stirling or "hot air" engines (all types)
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