Our son made this in his CNC machining class. It's running on compressed air here.
http://www.youtube.com/watch?v=5SQnJvWDpeE&feature=colike
[cool]
Is he going to make a boiler?
Boiler.... he has mentioned it
Very impressive!
Bruce
[cool]
VERY NICE !
my BIL says that they usually run much smoother and quieter with steam
He has a steam powered tug boat that he built
great project !