http://www.greenpowerscience.com/ This is an update on the progress of the Stirling Engine created from a standard air compressor. This hot air engine should finally get some power. The piston rings were removed as the machining of the pistons was very good. There is still good compression. The ring removal decreases friction dramatically and will allow for a good cycle. The Displacer is a Bikini Spray can that I got to fit perfectly.
At the end is the ghost of Robert Stirling. Just kidding, think I have been working too hard.