Re: [CAD_CAM_EDM_DRO] Re: floating aluminium

Tony:

In an MRI you don't need to pulse the field. The field is a static coil
with a superconductor wire carry'ing 750AMPS at zero ohm's and zero volts.
The field lines are so dense that just the aluminum starting to fall is
cutting enough lines to generate the current.

Art

----- Original Message -----
From: <info.host@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, June 07, 2001 9:33 AM
Subject: 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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