While waiting for component Nexus6 crankshafts and final plates a small demo of the simplicity of a no-bearing hot air engine. 3hrs start to running errrr melting the lexan got to hot as I made it go faster it began bubbling on the aluminum base plate. I never expected it to work so have a stainless cup base for this one next. shot of the gear added in, pins and brass cams it's all in the sealing. I made this stirling from a large lexan pepper shaker and graphite piston and aluminum base. I did no calculating but wanted to prove to myself my pressurized project will benefit from some real engineering.