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two displacers and one double acting work piston

Posted: Fri May 04, 2018 2:40 pm
by omblauman
I am looking for examples of Stirling engines which power one double acting piston with two oppositely phased displacers.
One known case is Jim Dandy's #6
Another one seems to be the river paddle boat Heiland Lad
Is anybody aware of more realizations of what seems to me the most natural form of a pressurized Sterling engine whose great advantage is the one of keeping the work piston leaks confined to the two closed cycles?
thanks Oskar