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Re: toroid shaped coil capacitance
From: Rick L. Kirby[SMTP:rkirby-at-earthlink-dot-net]
Sent: Saturday, January 03, 1998 1:33 PM
To: Tesla List
Subject: Re: toroid shaped coil capacitance
Tesla List wrote:
>
> From: D.C. Cox[SMTP:DR.RESONANCE-at-next-wave-dot-net]
> Sent: Friday, January 02, 1998 6:37 PM
> To: Tesla List
> Subject: Re: toroid shaped coil capacitance
>
> to: Mark
>
> Do your reference books contain any equations for the "suface area" of both
> a sphere and torus? I'm working on an article for the TCBA and have the
> equations for capacitance but not surface area. Thanks in advance.
>
> DR.RESONANCE-at-next-wave-dot-net
TO: DR. RESONANCE
I use the equations from the " MACHINERY'S HANDBOOK 17TH ED"
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for a sphere area (sq/in)= pi x dia^2
for a 5" sphere
3.1416 x 5"^2
3.1416 x 25
78.54 sq/in surface area
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for a torus I will try to discribe as follows:
if my torus (15" major O.D.) is made out of (5" minor O.D.)
dryer duct I would have a 5" empty space in the middle.
now the AVG.DIA.(a circle formed by a line following the center
of the dryer duct) of this torus would be 10".
so: area (sq/in)= pi^2 x avg.dia x minor dia.
3.1416^2 x 10" x 5"
9.8696 x 50"
493.48 sq/in surface area
---------------------------------------------------------
Hope this helps :>)
Rick L. Kirby