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Re: Sparklength inquiry


  JohnF -

  You are absolutely correct. But I did use some small coil data from
experienced coilers. Note also that we are talking about two types of spark
length, controlled and streamers. What surprised me was that the curves
crossed. Obviously somethings wrong. To be corrected with more building and
testing.

  I am still waiting for someone to develop an input watts to spark length
computer program so the JHCTES can be compared with it.

  What are your comments on the Uman Lighting data and the Tesla coil data
I sent to Greg?

  John Couture

---------------------------------


At 08:50 PM 9/27/98 -0600, you wrote:
>Original Poster: FutureT-at-aol-dot-com 
>
>In a message dated 98-09-25 20:33:57 EDT, you write:
>
><< 
> >   Power Input     JohnF    JHCTES
> >   680 W           42"      15"
> >   2100 W          64"      35"
> >   8400 W          128"     97"
> >   10 KW           15'      9.3'
> >   26 KW           25'      18.3'
> >   33.6 KW         21'      23'
> >   67 KW           31'      38'
> >   109 KW          45'      55'
> >   134 KW          42'      64'
> >   538 KW          84'      180'
> > 
> >   Note that both curves cross at about 33.6 KW with a 21 and 23 ft spark
> > length. The streamer sparks are longer below this level and shorter above
> > compared to the controlled sparks. The JHCTES data is from the computer
> > program and the Fig 2 graph in the TC Design Manual. This graph is
based on
> > power levels to only 60 KW and has been extended to higher power levels
> > without actual test confirmation.
>  >>
>
>John C,
>
>My guess is that since you took the results of various coils of
>various sizes and averaged(?) them, you'd be averaging the good,
>the bad, and the ugly.  In many cases, small coil = novice coiler,
>big coil = experience coiler, thus the big coils will be built better,
>work better, be "more efficient".  This will skew the results of the
>small coils *understating* their true capabilities, and make them
>appear *proportionally* wimpy compared to the big brute (properly
>built) coils.  BTW, that's my *old* power curve above, the new one
>shows a little better efficiency.  Long sparks seem to need lots o'
>power.  (crank 'er up 'til she blows!!)
>
>John Freau  
>
>
>