A Cnet report:
Fill'er up: http://www.news.com/2300-11389_3-6225395-4.html?tag=ne.gall.pg
This one says:"Here's where you fill 'er up with compressed air. The air drives the pistons in the engine, and the engine returns the favor by recompressing air for later use."
A perpetual motion machine! These reporters are such idiots. - Jed
