Re: spark size

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

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Paul,

John Freau's formula seems to work very well:

Spark length in inches = 1.7 x SQRT (power input)

So a 9/30 NST is 9000 x .030 = 270 watts and the spark length is 28 inches 
if everything is perfect.

Cheers,

         Terry



At 05:16 PM 1/3/2003 +0000, you wrote:
>Hello all, hope you have had a good festive season.
>
>I have had a look around at all the formulae and keen to start the 
>construction of my first coil, one thing I have been unable to determine 
>(other than it depends on ambient conditions) is the size of ark. Is there 
>any formula for determining the size of ark you are likely to produce ?
>
>
>Paul