RE: TC vs Lightning

• To: tesla-at-pupman-dot-com
• Subject: RE: TC vs Lightning
• From: "Payne, Will E" <will.e.payne-at-lmco-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Mon, 28 Sep 1998 17:06:06 -0600
• Approved: terryf-at-verinet-dot-com

See terrestrial lightning and 'upward lightning' parameters online at
http://www.altair-dot-org/atmoelec.htm
Much of the terrestrial data is from Uman.

Will
<snips>

>   I have attempted to compare the Lightning parameters in Uman's book with
> a typical Tesla coil using the JHCTES program. The coil is 60 KW with a 10
> meter (32.8 ft) spark length. This coil is similar to your 55 KW coil
> described in the TCBA News Vol 10, #2, page 14. 
> 
>                     Uman                Typical
>                     Lightning           Tesla Coil
> 
>   Kvolts/m          1000                316
>   Surge Z/m         100                 2434
>   Amps              10^4                130
>   watts/m           10^10               4.1 x 10^7 
>   time usec         10                  10 
>   joules/m          10^5                410
> 
>   KVs = 65 x (32.8 X 12)^.65 = 3160/10 = 316 KV/m
>   Surge Z ohms = sqrt(ls/Cs) = sqrt(.0646/109X10^-12)
>                = 24344/10 = 2434.4/m
>   Amps = V/Z = 316 000/2434.4 = 130
>   Watts = V x A = 316000 x 130 = 4.1 x 10^7/m
>   Joules = W x t = 4.1 x 10^7 x 10^-5 = 4.1 x !0^3/10 = 410/m
> 
> 
> >See Page 215, 'Lightning', by Uman.  
> >The typical energy in a strike is approximately 100kJ/m.
> >Therefore a 2 mile strike would therefore dissipate about 
> >_322 MILLION_ Joules.
> >
> 

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