Re: Medhurst Formula (fwd)

To: tesla-at-pupman-dot-com
Subject: Re: Medhurst Formula (fwd)
From: Tesla List <mod1-at-pupman-dot-com>
Date: Thu, 6 Aug 1998 21:52:34 -0600 (MDT)
Approved: mod1-at-pupman-dot-com



---------- Forwarded message ----------
Date: Wed, 5 Aug 1998 23:27:26 -0600
From: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Medhurst Formula (fwd)

to: Mike

Nice derivation -- that will help builders actually use some of these
equations without going nuts in the process -- the result is better coils,
more fun, and less math to wrestle with all around.  Also allows for even
faster "what-ifs" and will be easy to builder into a basic or V basic
computer program for fast computations.  Nice algorithm.

DR.RESONANCE-at-next-wave-dot-net

----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Medhurst Formula (fwd)
> Date: Wednesday, August 05, 1998 8:48 PM
> 
> 
> 
> ---------- Forwarded message ----------
> Date: Wed, 5 Aug 1998 08:57:48 EDT
> From: Hollmike-at-aol-dot-com
> To: tesla-at-pupman-dot-com
> Subject: Medhurst Formula
> 
> Hi all,
>    I recently derived an equation for the Medhurst self-capacitance.  I
> thought I should present it and get feedback from those on the list.  I
used
> the data from Ed Sonderman's spreadsheet calculator, so it should be
valid for
> H/D > 2.   This equation won't work for H/D < 2, but I got a correlation
> coefficient of 0.9994 above that.  
> 
> Cself = 0.256479H + 0.78646D pF where the dimensions are in inches.
>  
> For our friends abroad it is:
> 
> Cself = 0.100976H + 0.30963D pF  where the dimensions are in centimeters.
> 
> I would greatly appreciate any feedback on this as I wish to use it for
> another mathematical exercise in the near future.  
> Thanks,
> Mike Hollingsworth