1) Alnico will not discharge or decay except by strong heating [to the Curie
point] or a very strong magnetic field, neither of which exist in the Mylow
setup. It takes a very strong magnetic field to magnetize the alloy, as with
ferrite or neodymium. These typically relax some after the magentizing field
is removed, but thereafter are very difficult to demagnetize.
2) Mylow reports the stator magnet getting cold during operation. This has
been reported before.
3) The disc accelerates during the demonstration. The protruding rotor
magnets will provide an aerodynamic drag. This is not a pedulum. Jones
reports that certain gongs can grow louder before dying away; ths is a
mattor of complex modes of vibration and human hearing, not rotation of a
disc.
4) One could hypothesize a large, strong rotating magnet or magnetic field
under the floor which could accelerate the disc as an induction motor. One
would like to see the demonstration moved an *arbitrary* point on pavement
or a earthen field.
Mike Carrell
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