Re: New toroid

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

Original poster: "Gregg Adams by way of Terry Fritz <twftesla-at-qwest-dot-net>" <network-at-nexband-dot-com>

Hey Ed,
   I use to stretch the duct out but don't anymore.  You'll get a smoother
toroid if you buy more to make the complete circle without stretching it and
then covering it with AL tape.  It sounds like the type of AL duct you have
is different from mine.  Mind you, mine will dent but not that easy.

Good luck,
Gregg Adams




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, September 18, 2002 7:22 PM
Subject: New toroid


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Esondrmn-at-aol-dot-com>
>
> Well, I made my first toroid out of semi-rigid aluminum duct pipe 3"
> diameter.  For all of you with real nice looking toroids made out of this
> stuff, I congratulate you.  I used 9" metal pie pans for the center, using
> three pop rivets to hold them together.  I stretched out the ducting and
was
> surprised to find it about as thick as aluminum foil.  Somewhat hard to
work
> with and difficult not to damage.  The material is segmented in groups of
> four segments, then a space, four segments, etc.  I tried to cut the ends
> smooth between two segments so I could join the ends and have even groups
of
> four segments.  Then I realized the material is one continuous spiral and
it
> is impossible to cut flat on the ends.  I ended up cutting it with
scissors,
> not very well, then making short cuts in one end all the way around,
pushed
> this into the other end and put a wrap of aluminum tape around it.  Now I
> placed the pie pan center on the table and tried to re-compress the thing
so
> it would fit tight around the pie pans.  Now it wants to kink up into a
snake
> because of the spiral manufacturing technique.  So I took the tape off,
> compressed it to fit and eventually got it taped to the pie pans without
> looking too terrible.
>
> Is there any better material to use?  Something made with aluminum that is
> maybe two or three times as thick?  Is it all spiral wound?
>
> Thanks, Ed Sonderman
>
>
>