(December 17, 2016 at 6:53 am)zebo-the-fat Wrote: How about a low temperature Stirling engine http://www.stirlingengine.co.uk/LowTempe...ngEngines/
or a drinking bird https://www.amazon.co.uk/d/Toys-Games/Co...B004USLXD6
I used to spend a LOT of effort on drinking birds...
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax