A while back I posted some info about a liquid-piston Stirling cycle
engine (fluidyne) and some readers asked for more info.
I've posted a link to a short WMV video (436 KB) about halfway down
the web page below for anyone interested in seeing it run.
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Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/StirlingProject.html