"Onoit" <onoit@sno.tso> wrote in message 
news:13q411hqvoo8a16@corp.supernews.com...

  I am wondering if one can make a UFO just by 
continuously moving the center of gravity up? So, 
supposing a UFO had a moving ring, and there are magnets 
on the track that meet the magnets on the moving ring, and 
this simultaneous force kicks the ufo up the vertical 
axis?
  Maybe this doesn't have anything to do with the center 
of gravity, though. It seems more like the center of 
levity.

So what is the force going to push downward to 
counterbalance the upward push?  Is this ring going to stay 
with the craft somehow?

Michael