HNR,
As other posters have suggested, a Google search should turn up some answers. You could start with Sperrys rules of precession.
Also try
here
I wonder if you are thinking of something along the lines of Alex (Sandy) Kidds machine. 3 coupled gyros (I think) and it convinced Prof. Eric Laithwaite that when powered up, it "lost" weight.
Still some way to go before we get to the spindizzy .....
