Re: Medhurst Formula (fwd)

• To: tesla-at-pupman-dot-com
• Subject: Re: Medhurst Formula (fwd)
• From: Tesla List <mod1-at-pupman-dot-com>
• Date: Sat, 8 Aug 1998 14:11:41 -0600 (MDT)
• Approved: mod1-at-pupman-dot-com

---------- Forwarded message ----------
Date: Sat, 8 Aug 1998 06:18:31 EDT
From: Hollmike-at-aol-dot-com
To: tesla-at-pupman-dot-com
Subject: Re: Medhurst Formula (fwd)

to: Erik, Dr.R,

     I hope you guys are right about this, since the coil I am working on now
is 8 inch diameter and 25 inches tall.  I guess I will see.  Thanks for the
responses.
Mike 

>Very interesting.  Us and others have also noted these curious results --
>it just seems to keep getting closer to 3.14159.  Hmmmm indeed.

> Hi Mike,
> 	I did a little thinking.
> Since (from you) Cself = 0.256479 * H + 0.78646 * D.  If you 
> set H = 0.78646 and D = 0.256479 you will get the largest coil
> (as in most wire which leads to more inductance) for a given 
> amount of capacitance.  It just so happens that H / D or 
> 0.78646 / 0.256479 = 3.06637.  So this would suggest a  
> reason to use a height to diameter ratio of 3. Hmm
> 
> Just a thought.

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