Re: [TCML] 135ft arc 3ft sphere - Possible?

[Stephen Hiscock <stephenhiscock@xxxxxxxxx>]

Hi there,

It is implied by  DC Cox and Richard Hull it seems that the spark length 
of 135 feet is a myth?
well just a question regarding this spark length...
What has terminal size got to do with how far a spark will go?
I'm not saying Richard Hulls analysis is wrong, but doesn't power 
ultimately determine spark length?
Wouldn't a 3 feet sphere ONLY determine the initial break out voltage?

Heres what I found already posted on this list on 8 june 2003 and AGREED 
upon by many people:
subject: spark length vs. power input
Sun, 08 Jun 2003 21:35:53 -0600
Original poster: "Dr. Resonance by way of Terry Fritz 
<teslalist-at-qwest-dot-net>"
[.....snip
d = k' * sqr p
where d - spark length in inches
k = coil factor - from 0.5 to 2.0 (for most coils)
p = input power in watts

k' is dependent on the dia. of the sec. coil as follows:
k' = 0.85 when sec. dia. is 3-10 inches (small coils)
k ' = 1.0 when sec. dia. is 11-16 inches (medium coils)
k' = 1.3 when sec. dia. is 17-20 inches (large coils)
k' = 1.7 when sec. dia. is 21-36 inches (very large coils)
k' = 2.0 when sec. dia. is 37-48 inches (super coils)
.... end of snip]

so from the above snippet and calculations a spark length of 135 feet 
from Tesls coil is VERY REASONABLE
and certainly within the accepted range of spark length, power input and 
coil k

ie power levels from 500 Kilowatts up to 2 Mega watts for k between 1 & 
2 and if his coil had a k bigger then he only needed a small generator 
perhaps 50 kilowatts.
But we know tesla had a big generator of perhaps this much power - I 
couldn't find a reference but I'm sure it was 2000 horse power -- which 
is easily big enough

Am I missing something?
WHAT IS WRONG WITH 135 feet?

cheers..

DC Cox wrote:
> This is a great book.
>
> Rich did a tremendous amount of analysis work on Tesla's work.  Rich
> provides clear explanations and offers some educated insight into what Tesla
> may have been thinking as he conducted his famous experiments.  Rich also
> negates some myths that were spun in the book, Prodigal Genius, especially
> the 135 ft. long sparks off a 3 ft. dia copper sphere.
>
> Glad to see it for sale again.
>
> D.C. Cox
>
>
>
>
> On Tue, Sep 29, 2009 at 12:44 PM, Richard Hull <hullr@xxxxxxxxxxxx> wrote:
>
>   
> > It has been a long while, but I am signing back on to alert anyone
> > interested in my expanded book,  "The Tesla Coil Builders Guide to the
> > Colorado Springs Note of Nikola Tesla", is back in print and is being sold
> > by Electric Spacecraft Inc. ,by agreement with me.
> >
> > I am told by them that the book is to be priced at $35.00 plus $5.00
> > shipping.
> >
> > I constantly get requests for this book which has been out of print and
> > have had to turn folks away.  It is now back in print.
> >
> > You may contact them directly at  www.electricspacecraft.com<
> > http://www.electricspacecraft.com>
> >
> > Richard Hull
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> >     
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