I'm as ignorant as can be about stirling engines, but a thought struck me when watching this. The really new commercial stirling engines are able to use parabolic mirrors to focus sunlight onto the compression cylinder. I wonder if this old Philips engine could be made to run that way, or if the ...
@SethVandenberg - I think what you heard was the phrase "six-inch liner," referring to a 6in tall liner inside the bag, for keeping it relatively rigid. Dave also mentioned that there's a nine-inch liner, too.
That's awesome. Congratulations! Welcome to the world of aural experiences.
Also, I like your sleeve.