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TC RMS Conditions - was Voltage/Length etc. (fwd)


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From:  John H. Couture [SMTP:couturejh-at-worldnet.att-dot-net]
Sent:  Monday, February 16, 1998 7:34 PM
To:  Tesla List
Subject:  Re: TC RMS Conditions - was Voltage/Length etc. (fwd)


 To DR. RESONANCE -

  These are inverse equations for one million volts and 49.8 inches:
  
     S = (KVs/65)^1.43 = (1000/65)^1.43 = 49.8 inches spark length

     KVs = 65 x S^.7 = 65 x 49.8^.7 = 1002 KVs sec voltage

  This equation was obtained by mathematical regresion methods using data
from several dozen coils. The equation is subject to change when more data
becomes available. The spark is a controlled spark length. This is a
continuous horizontal spark to ground which is shorter than the random spark
terminating to graund. The controlled spark more truly represents the
continuous watt second input enrgy into the Tesla coil.

  John Couture    

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

At 07:55 PM 2/15/98 -0600, you wrote:
>
>----------
>From:  D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
>Sent:  Sunday, February 15, 1998 12:12 AM
>To:  Tesla List
>Subject:  Re: TC RMS Conditions - was Voltage/Length etc. (fwd)
>
>to: Antonio Carlos
>
>Is the spark equation "everything in the brackets raised to the 1.43
>power"?  It didn't come across clearly on my e-mail.
>
>DR.RESONANCE-at-next-wave-dot-net
>
>
>
>> Date: Sat, 14 Feb 1998 00:12:57 -0800
>> From: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
>> To: Tesla List <tesla-at-pupman-dot-com>
>> Subject: Re: TC RMS Conditions - was Voltage/Length etc. (fwd)
>> 
>> John H. Couture wrote:
>> 
-----------------------------------   Big snip

>> >   The Tesla coil secondary voltage and spark length equation is:
>> >        Spark inches = (KVs/65)^1.43
>> 
>> This equation can be used to determine how much voltage is required for a
>> given spark length, but how to compute the power required to keep the
>> spark channel?
>> The maximum energy available at the secondary, T seconds after each break
>is:
>> E2max=0.5*C2*V2max^2
>> and so the maximum power available to keep sparks, assuming breakout
>> at the peak voltage, is:
>> P2mean=E2max*Fb
>> where Fb is the mean break frequency (the break rate is somewhat random,
>> as you wrote).
>> An useful empirical equation to obtain would be:
>> Mean expected spark length=function of V2 and P2.
>> Both parameters are important, since voltage alone produces thin, cold
>sparks,
>> and power alone without voltage results only in heat.
>> 
>> >   What is your explanation of how the energy and power is utilized in
>the
>> > Tesla coil, input watts to spark length?
>> 
>> See above.
>> 
>> Antonio Carlos M. de Queiroz
>> mailto:acmq-at-compuland-dot-com.br
>> http://www.coe.ufrj.br/~acmq