Re: Toroids from Foam

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

Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>

Im sure it was quite messy!  Thats a rather large dome! And thats a lot more 
carving a dome than a toroid(less curvature and height).  I bought some 
rubber glue stuff that said its good for polystyrene.  My discs are together 
already, and im contemplating spinning it today.  Wish me luck!

Steve Ward.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Toroids from Foam
>Date: Mon, 02 Sep 2002 12:32:52 -0600
>
>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.
> >
> >
> >
> >