Re: Toroids from Foam

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Roger Drosd by way of Terry Fritz <twftesla-at-qwest-dot-net>" <roger-at-gcisnow-dot-com>

I used this method to make a 24" dome for a Van de Graaff generator.  It
worked quite well, though it's a bit messy.  Your shop will become a winter
wonderland while carving the foam block.  I rough-cut the disks on a band
saw before gluing them together.  Use a water-based glue, as contact cement
will dissolve the foam.  While the block is turning, you can achieve a
pretty smooth surface by using a disk sander to shape it.  This will reduce
tear-out.

Roger Drosd
roger-at-gcisnow-dot-com

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, September 02, 2002 7:09 AM
Subject: Toroids from Foam


> Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<srward16-at-hotmail-dot-com>
>
> Hey,
>
> Today i went out and bought a sheet of pink polystyrene foam board.  I
> wanted to stack 3 discs of it to make a wheel thats 16" diameterX4.5"
tall.
> Then i want to spin it on a drill(poor man lathe), and shave it away with
a
> rasp, or grater.  Ill shave it to the shape of the toroid, then paint it
> with epoxy, then cover with foil tape.  Has anyone done this?  Does anyone
> have some good websites that discuss this.  I need some help as i am
already
> having problems.  Thanks a bunch!
>
> Steve Ward.
>
>
>
>
>