I think he got as far as the goals, there are 2 videos and he shows it running on propane, but like many projects they may of lost interest or moved on. I can understand that to break new ground you have to have tons of time and be willing to destroy the device you put hours into to make progress.
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Looky what I found ->>> http://diystirlingengine.com/sv-2-stirling-engine-generator/
I googled a few terms looks like there is more data here.
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