thats what I was thinking. The trick of getting more power out of something than you put into it is going to hold this stuff back. I have seen a few videos on the web where people show a car running on this type of design but then you have to deal with not everything you see on line is true.

I guess you could make one for cooking with if you had a way to generate power from wind/solar and stored in 12 volt bats.

I might play around with one just to see if I understand it all.
They look like something that might be fun to make and understand.