Re: Sparklength inquiry

```Adding to my own post here, I had some thoughts
regarding sparklength equations.

Following a Vs equation; Vs = sqrt(Cp/Cs), Vs =
sqrt(Ls/Lp), Vs = sqrt(2J/Cs), etc..
If the efficiency is computed (Vs * eff.), then the
energy available for the arc channels in watt/seconds
(I'll call it Es?) should be:
Es = .5 * Cs * (Vs * eff.)^2 / 1000.

With BPS added, the equation should be the Energy per
break (I'll call it Ebps?:
Ebps = Es * BPS

If John Cortures emperical equation for sparklength
(Vs/1000/65)^1.43 has Vs replaced for Ebps, the
sparklength in inches is equated as:
Sparklength = (Ebps/1000/65)^1.43

I ran this with several different bps, Vs,etc.. and the
sparklength appears to change as one would expect. Of
course, efficiency is not calculated here. I simply used
80%.

I was just playing with numbers, but strangely enough,
this method matched my coil to my surprise. I would be
curious if this equation matches sparklength for other
coils.

Bart

Tesla List wrote:
>
> Original Poster: "Barton B. Anderson" <mopar-at-uswest-dot-net>
>
> Hi All,
> I'm in search of an equation for sparklength. To be
> clear, I am looking for an equation which accounts for
> bps. All methods I've seen posted leave out the fact
> that higher break rates increase sparklength (or kills
> the tank cap). Although Vs does not change with a change
> in bps, the streamer lengths do. Isn't this important to
> any sparklength equation? I know adding bps will not hit
> dead on, but hopefully a bit closer than 20 or 30kv/inch
> or the emperical calculations (how does emperical data
> take into account bps for my coil or the next guys?). I
> know there may be nothing available, but you never know