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Published on Apr 20, 2011
Water bottle Stirling engine made from aluminium water bottle. Inspired by approtechies Stirling engines. Uses wire wool displacer, bike hub and ball bearings. It's running around 450rpm in the video, I've had it upto 600 on max heat, but that seems to be about the limit. I haven't managed to achieve high RPMs but it's still a good engine. As apportechie found, the aluminium is too conductive so it limits the speed a bit. It feels quite powerful. Yes I know the electric water pump uses electricity, I couldn't et the thermosyphon to work properly .....
Building another using SS bottle (when I find one). Hopefully I will be able to get this running closer to the very impressive speeds approtechie acieves with the SS botle. I will take complete photo's to make a how to. guide