Re: Calculating Capacitance of solid disk

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

Original poster: "Barton B. Anderson by way of Terry Fritz <teslalist-at-qwest-dot-net>" <classictesla-at-netzero-dot-com>

Yes, I reposted tonight the correct value. I had input meters instead of 
inches.

Thanks,
Bart

Tesla list wrote:

>Original poster: "John H. Couture by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
>
>
>Bart -
>
>The 140.08 pf can't possibly be the correct capacitance for a 4 inch disk.
>My estimate is about
>   3.98456 pf capacitance.
>
>John Couture
>
>-----------------------------
>
>
>-----Original Message-----
>From: Tesla list [mailto:tesla-at-pupman-dot-com]
>Sent: Sunday, March 09, 2003 1:32 PM
>To: tesla-at-pupman-dot-com
>Subject: Re: Calculating Capacitance of solid disk
>
>
>Original poster: "Barton B. Anderson by way of Terry Fritz
><teslalist-at-qwest-dot-net>" <classictesla-at-netzero-dot-com>
>
>Hi Dan,
>
>This is a nice function of Fantc. It can perform analysis of object
>capacitance for toroids, spheres, spheroids, discs, and cylinders (up to 10
>each of wanted). In this case, I simply computed the 4" disk capacitance.
>Here's the output at a detail 3 setting.
>
>Computing ..... please wait
>System or Object Capacitance: 140.08 pF
>Run CompleteTime elapsed: 2.1 secs
>
>To run an objects capacitance, input the dimensions. For your inquiry, my
>inputs were:
>disc inside diam. = 0
>disc outside diam. = 4
>disc height = 0
>
>Then, check the "Disc" checkbox as the system component (only one needed),
>and press the "Run Capacitance Analysis" button.
>http://www.classictesla-dot-com/fantc/fantc.html
>
>Take care,
>Bart
>
>Tesla list wrote:
>
> >Original poster: "Mccauley, Daniel H by way of Terry Fritz
> ><teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
> >
> >
> >Instead of a toroid, I'm going to use an aluminum disk top plate which I'll
> >lathe to have nice radius outside edge.
> >
> >Anyone know how to calculate the capacitance of a disk like this?  I would
> >think it would be approximately close to
> >the standard toroid capacitance formula.
> >
> >I know I could measure it directly using another coil, but I'll be
>designing
> >and winding my secondary before I machine this
> >disk so I want to get a good approximation of the disk.  The dimensions
>will
> >roughly be about 4" diameter and 0.5" in height.
> >
> >Thanks
> >
> >The Captain
> >
> >
> >
> >
>
>
>
>