Re: [TCML] lareg toroids for Tesla coils

[Arjan van der Schee <vam@xxxxxxxxx>]

A bit late but here it is.

The size of the toroid is 264*64 cm or 104*25 inches
I used 12 hoops made from 4cm/1.6inch dia aluminium tubing.
center to center spacing is 11.5cm/4.5inch
edge to edge is 7.5cm/3 inches

The streamers break out quite evenly from the 4 largest rings.
I never did any electrostatic plots for this toroid cause i don't have a program for it.
So i did it on gut feeling and some feel i got by playing with terry's program some years ago.

I hope this helps
Arjan.

At 08:46 29-11-2008, you wrote:
>I picked up a large dia tubing bender and plan on doing some 38 x 12, 48 x
>16, and 120 x 30" size toroids next summer.  It will bend both 1" alum and
>copper tube, and also 3/4" alum or copper.
>
>If anyone is building a large coil and needs inexpensive toroids, I will
>extend an invitation to anyone to come up to Wis. Dells and "roll their own"
>large dia toroids using the "ring method" of spaced finite elements.  I can
>do the small inner hoops with our tig wirefeed aluminum welder and you just
>roll the rings to fit.  We also have an excellent local supplier for the 3/4
>and 1 inch size of aluminum pipe.
>
>We are presently using Maxwell 3D to determine the optimum electrostatic
>plots to get the best spacing.  I plan on doing the large 120 x 30" size
>using 1" OD alum tubing with a 2 inch spacing between each element.
>
>Perhaps Arjun or Greg Lehy might advise on the tubing dia and spacing they
>found most efficient for their toroids.  I know Greg used stainless to
>create his large 12 ft dia sphere and Arjun used aluminum tube to create his
>finite element toroid.  I'm most curious on the tubing size and spacing they
>both used.  Comments guys?
>
>Best regards,
>
>Dr. Resonance
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