The Freau number...

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi All,

With all this modeling stuff going on, we seem to need to solidify a 
constant...

John Freau has this equation:

        spark length (inches) = 1.7*sqrt input power (wallplug watts)

That "1.7" seems to be a pretty important number given all this DRSSTC and 
streamer energy rise time stuff...  But that number changes depending on 
coil type and apparently Streamer Energy Rise Time (SERT) ;-)

I would suggest the constant "F" as this:

        Spark length (meters) = F x SQRT(bang energy x BPS)

"F" would stand for "Freau" so John will be eternally famous!!  I would 
suggest going to meters just to keep things "scientific".  BPS would be 
assumed to be the optimal optimal number, but it should be in there since 
many have 50Hz power and the DRSSTC can have any BPS it wants...

The units of "F" would be "meters / SQRT (bang power(watts))"

John used "wallplug" watts but that is not quite fair for those that are 
running lights and fans ;-))  Bang energy is the energy on the primary cap 
at firing for a conventional coil or the input energy for a 
DRSSTC.  ScanTesla makes that easy to find now...

Obviously, we would want to make our coils with as high of "Freau number" 
as possible...  "Freau" is fairly unique so it would not get confused with 
anything else...

Comments, observations, thoughts, suggestions....??

Cheers,

        Terry