LEVITATION:
As we know superconductors supercooled will hover above or below powerful magnetic fields. Tracks sometimes are used to illustrate this remarkable effect. For those inclined, these demonstrations on video look remarkeably like the descriptions used for UFO sightings. And it seems reasonable to suggest that this supercooled superconductor technology, if made of larger and more powerful superconducting materials, could use the earth's relatively weak magnetic field. Instead of the usual small powerful neodium magnets used in current lab experiments. Cynics say the earths field isn't powerful enough and at the wrong direction and not uniform enough to levitate supercooled superconductors. As usual these excuses don't stack up. The magnetic tracks in the lab versions are not uniform either. Nor does the field direction effect the observed levitating superconductor. Because as the videos of the experiments show...The superconductor levitating discs can be placed at any angle on the track and still levitate and move around the track at that fixed angle. ( In other words at any Angle to the magnetic field, including horizontally as with the earth's field at any point.) Obviously field direction is not a restriction. The only restriction really is....expense and technology. In other words it's possible that given the right research , money and time, one cannot rule out a large powerful supercooled superconductor levitating using only the earth's magnetic field.
PROPULSION:
But the second hurdle to face if trying to duplicate the many anecdotal descriptions of UFO sightings is...How to move the supercooled superconducting disc as it hovers above ground in the earth's field. Without using any observable or currently known propulsion methods, like rocket propulsion for instance. Answer...The phenomena associated with the Preccession of a spinning bicycle wheel. Note that a spinning wheel on an axis will precess or move in the direction of the bicycle wheel rotation. This is the answer to the problem of propelling the levitating superconductor disc without any obvious observable propulsion system. All that needs to be done is place a spinning wheel on a fixed axle and attach this to the levitating super conductor disc. And when this wheel spins it would move, ie precess, the superconducting levitating disc itself in the direction of the spinning wheel. To change direction of motion of the superconducting levitating disc, all one has to do is rotate the axis of the spinning wheel. To reverse the direction of motion....just reverse the rotational direction of the spinning wheel. Or Rotate the axis of rotation of the spinning wheel 180 degrees.
So there we have it. Known and proven effects of preccession to propel the levitating disc. And the tantalising possibility of tech advances in size and strength of superconductors to allow levitation itself in just the strength of the earth's magnetic field. My guess is...this has already been achieved in some secret lab somewhere already.
