Jean-Louis Naudin's stirling engine running on a glow discharge,
tungsten welding rods in potassium Carbonate_** _** , looks good. It's
2003 work but the web site is relativily new. Except for the web page
glitchs Steven noted is there any problem with naudin's work. The
demonstration is itself quite powerful. I hope to use it and other
material in presentations to my friends in the Mars Society.
See:
http://jlnlabs.imars.com/cfr/html/cfrstir.htm
.