Re: 81" Continuous Arcs!

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Bart,
         Apologies if I am speaking out of turn - please bear with me.

On 11 Jun 01, at 19:01, Tesla list wrote:

> Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>
> 
> Hi John,
> I never consider a twin coil spark length as the length of two branches
> meeting and
> summing their meshed lengths together, but just simply each coils
> individual spark
> length ability.
> 
> Bart

If the coils are sharing primary energy, I do believe that John's 
assertion is correct. It is easy to show that two coils driven from a 
single primary cap containing some nominated energy can do better 
than a single resonator alone on the same amount of energy. They 
certainly can if you consider the potential difference between their 
business ends. I hope I've followed this thread correctly. My 
apologies if not.

Regards,
malcolm
 
> Tesla list wrote:
> 
> > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <FutureT-at-aol-dot-com>
> >
> > In a message dated 6/11/01 10:18:30 AM Eastern Daylight Time,
> > tesla-at-pupman-dot-com writes:
> >
> > >
> > >  > Original poster: "Christopher Boden by way of Terry Fritz
> > >  <twftesla-at-qwest-dot-net>" <chrisboden-at-hotmail-dot-com>
> > >  > What is the longest realistic streamer length for a bipolar twin coil
> > > system
> > >  > at 10kVA 13.8kV?
> > >
> > >  With John Freau's NST formula 14.2 ft. With John's Potential Transformer
> > >  formula 17.5 ft. So I'd say
> > >  somewhere in between, and if your not hitting at least 14 ft., there
will
> > >  be some efficiency work to be done
> > >  (These numbers consider 120 bps and in John's testing, less spark length
> > >  for higher bps.  These are
> > >  considered rather optimum spark length efficiency's. Although spark
length
> > >  can exceed these numbers,
> > >  typically they don't).
> > >
> > >  Bart Anderson
> >
> > Bart, Chris, all,
> >
> > Twin coils give longer sparks than single coils for a given input
> > power.  To calc the spark length for a twin, first take 1/2 the
> > input power.  Use the formula on it, then double the result.
> >
> > Thus, for 10kVA,  1/2 of 10kVA = 5kVA.  The sqrt of 5000 =
> > 70.71 x 1.7 = 120" or 10 feet.  Double this result to give the
> > expected spark length of 20 feet for a twin.
> >
> > The reason that twins give longer sparks is because they must
> > be thought of as two smaller coils each of half the power,
> > each giving a spark length according to the formula.  The
> > result is doubled since the sparks meet at the center.
> >
> > Cheers,
> > John Freau
> 
> 
> 
>