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Thanks Ian,
Yes i was thinking to install some kind of cooling.But first i will test it with out them to see if there is a change to the output.

Finally the previous engine fail after many attempts.So i let that project. But i found a broken one on ebay and iam trying to rebuild it. The cylinder was missing so i made a new one.(aluminium) Now i am on the cleaning process. What i was wondering and wanted to ask: is the usual displacer piston ...

Thanks Ian.

I completed the first part and now need to go for the next, the air piston. :(

Whats your thoughts on size/volume? I guess must be the same as the chamber/stroke in cylinder.That is 5.5 the stroke by 5.4 the diameter of cylinder?
Sorry for the newbie questions
Michael

Finnaly after your thoughts i decide to cut the cylinder pipe at 17cm, found new displacer 5cm diameter and 11.5cm height. The stroke would be 5.5cm. I didnt decide yet what kind of Stirling engine i would build Was thinking/dreaming if is possible a free piston engine with two cylinders like the pi...

Hello. Iam trying to build a small engine and i need help on size details. i found these two pipes and i want to use them. The cylinder is 28cm(11inch)height and 5.4cm (2.1inch)diameter The displacer is 19.50cm(7.7inch)height and 5.2cm (2.0 inch)diameter. My question is these mesurments ok or i need...