RE: Toroid Building

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dave Halliday" <dh@xxxxxxxxxxxxxx>

Mass makes __zero__ difference.

What makes the difference is the diameter and size - surface area.

Think about this for a minute -- even if you are new to the list; there
are archives and if you go back over them, you can see that people have
been making styrofoam toroids and running them successfully.  My toroid
is made from spun aluminum -- a light metal and a hollow structure with
very little mass.

My guess is that mass not considered, your manhole ring will probably
perform poorly.  Although its major diameter is fairly large (the
overall diameter), I would guess that the minor diameter (the diameter
of the ring part itself) is fairly small -- you want this to be large
(6" minimum).

You can make a great toroid from a plywood disk and some aluminum
clothes dryer duct.  Go back through the archives, there are lots of
emails on how people did this and issues they ran into and how they
solved them.



> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Saturday, August 20, 2005 4:22 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: Toroid Building
>
>
> Original poster: "Binny" <binny@xxxxxxxxxxxx>
>
> Hello and thanks for the reply ,
>                                                   The manhole ring
> that I have is not much like the one you googled it would be best
> describen in a mechanicial drawing as front view a "T" shape with
> radiasied inside corners it is really massive and has a nearly
> torriodalshape altho the upper part of it has square corners ideal I
> would imagine for breakout.But the question remains is how does the
> mass of a topload affect peformance.Mabe I will just have to try it
> for myself and let you know how I make out.
>
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Saturday, August 20, 2005 2:49 PM
> Subject: Re: Toroid Building
>
>
> >Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>
> >
> >A manhole ring, such as this one I Googled, won't have
> >the shape you need:
> >
> >http://www.wsdot.wa.gov/eesc/design/designstandards/english/p
> df/b25_eng.pdf
> >
> >You need a true toroidal shaped topload. If you want
> >to use municipal products, try welded steel pipe.
> >
> >Adam
> >
> >--- Tesla list <tesla@xxxxxxxxxx> wrote:
> >
> > > Original poster: "Binny" <binny@xxxxxxxxxxxx>
> > >
> > > Hello list, and thanks once again for all the
> > > information you have
> > > shared so generiosly.,
> > >                 On the subject of torriod
> > > construction I would like
> > > to suggest using a balsa filler like I used when I
> > > was into R/C
> > > modeling,also known as spakle or sanding compound.It
> > > is lightweight
> > > somewhat flexible and sands very easily.Looks like
> > > marshmellow fluff
> > > and is sold in tubs. Also I would like to have the
> > > list members
> > > thoughts on a torriod that I would like to try on my
> > > 6" coil project.
> > > I have a manhole ring of the kind that is usually
> > > found in municipial
> > > wast water drainage systems.It weighs around 300 lbs
> > > and I am not
> > > shure how I will go about supporting it but I think
> > > it would make an
> > > indestructible torriod. So to the chase I present my
> > > querry. Does the
> > > torriod's mass affect it's capaicatince? How does a
> > > really massive
> > > pice of iron affect the peformance of a coil?
> > > ----- Original Message ----- From: "Tesla list"
> > > <tesla@xxxxxxxxxx>
> > > To: <tesla@xxxxxxxxxx>
> > > Sent: Friday, August 19, 2005 7:00 PM
> > > Subject: Re: Toroid Building
> > >
> > >
> > > >Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>
> > > >
> > > >Sounds kinda brittle (and heavy). I used drywall
> > > >compound for a smaller one and it worked out fine,
> > > but
> > > >I'm not so sure how it will work on a large scale.
> > > Why
> > > >not just try it with the corregations first? How
> > > about
> > > >Bondo? Works well, sands smooth, and is very
> > > durable.
> > > >
> > > >Adam
> > > >
> > > >--- Tesla list <tesla@xxxxxxxxxx> wrote:
> > > >
> > > > > Original poster: "Gerry  Reynolds"
> > > > > <gerryreynolds@xxxxxxxxxxxxx>
> > > > >
> > > > > Hi All,
> > > > >
> > > > > I'm in the process of making a 8x32 inch toroid
> > > > > using the heavy
> > > > > ducting from McMaster-Carr
> > > > >
> > > > > I have the toroid formed (ends attached) and I
> > > plan
> > > > > to mount an AL
> > > > > disc in the center with a little RTV.  I want to
> > > > > fill the
> > > > > corrigations with something that can be easily
> > > > > sanded to make
> > > > > smooth.  I am planning on using PLASTER_of_PARIS
> > > for
> > > > > this purpose
> > > > > (done after the center disc is mounted for
> > > > > rigidity).  After sanding
> > > > > smooth, I plan on sealing the plaster with a
> > > varnish
> > > > > and then adding
> > > > > AL tape starting and terminating on the AL disc.
> > > > >
> > > > > Does anyone see a problem with using the
> > > plaster??
> > > > > Grout is maybe
> > > > > another choice for a filler. Ideas welcomed.
> > > > >
> > > > > Gerry R.
> > > > >
> > > > >
> > > > >
> > > >
> >
> >
>
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