Re: [CAD_CAM_EDM_DRO] Re: floating aluminium

The field must alternate or pulse through a curve for a current to be
induced in the bit of metal in the way, like in a transformer. There is a
guy with a web page Sam Barow or something on the net who really loves this
kind of thing (He calls his site the Sam something Power Labs if you want to
find it). He makes coil guns etc for a hobby and has a video just like the
one you just described where he fires a metal disc into the roof of his
shed. You could mill that metal disc if you wanted to. :-)

John H.

> I remember from my school physics classes a similar demonstration, but

with

> an alternating field. The apparatus was a U-shaped iron armature, with a
> coil on one arm & an aluminium ring dropped over the other arm. When the
> coil was energized with mains AC, the aluminium ring shot upwards off its
> arm of the the armature, hitting the ceiling. Great fun!
>
> Regards,
> Tony
>
>
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