Original poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx> Hi Terry,I think he was saying 7.5 feet with 2.4KW and 15 feet with a twin using total of 4.8KW. Course, I could be remembering it incorrectly. The 1.7 Freau factor probably doesnt apply but the SISG does nothing to change anything downstream from the SG. The secondary coil, top load, and streamer formation physics are unaltered from a conventional SG TC. The sqrt(power) relationship should still be the same.
Example:Conventional SG coil with 1000W processed (bang*BPS) with 30% power loss in the SG. This coil would have 700w make it to the secondary and result is a spark lenght of say 50 inches.
Conventional thinking says it will take ~4000W processed to get a 100 inch spark. Such a coil with the same 30% loss at the SG would have 2800 watts make it to the secondary to get the 100 inch spark.
Now a SISG coil that has say zero loss in the SG would still need to process 700watts to get the 50 inch spark and 2800 watts to get the 100 inch spark it seems.
Of course if you use a twin phased correctly, then one should be able to double the spark length with double the power as DC was indicating. However, he was suggesting getting 7.5 feet from one of the twin coils with 2.4KW little more than twice the power of your 900 watt SISG coil that gets 42 inches. If the sqrt(power) relationship applies (and I see no reason why it wouldnt) then his could should develope 68 inch arcs not the 90 inch that he was thinking.
If my thinking is in error, please say where it goes wrong. Gerry R.
Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx> Hi,In the case of the SISG, Freau factors really don't apply. But if I get 42 inch arcs at about 900W then DC should be able to get 90 inch arcs at 4800 Watts... He will also be able to go a somewhat lesser distance at 1/3 that power...http://www.pupman.com/listarchives/2006/Oct/msg00077.html Cheers, Terry At 11:37 PM 10/31/2006, you wrote:Hi DC,I believe that higher efficiency will change the "Freau Factor", but I dont believe it will affect the sqrt(power) relationship. If it does indeed, this will be a much larger break thru than just an efficiency improvement. I will be anxiously awaiting results.Gerry R.