What a synical bunch you lot are.
I actually built such a device, it's in my garage.
Its an old bicycle wheel housed in a perspex vacuum box that's cooled to 0.001 Kelvin. ( must try harder).
The wheel levitates via a super conductive plasma flux.
It has been rotating un-aided for nearly six year's and the only grattitude i get is a visit from the police who were convince they would find a small chinese boy crouched on a dirty mattress under the stair's behind a jungle of weed.
I recently tried attatching a dynamo ( from the same old bike) to the wheel but it stopped.
My next project............
........ a ladder to the moon :smart: