Since the rod is buried in the PVC, not cemented on top of the strip, I see no reason to think that the odds are much better the flame will equally choose to propagate through the bottom side as well as the top side.jimmy101 wrote:Flames don't like to propagate through gaps. Too much surface area for the volume, resulting in too much heat loss. As I said, even the very small upper electrode of a spark plug gives a noticable shadow in the flame front. A gap is going to be much worse.
I'm actually giving the whole spark strip concept more thought and may present something here in a few days.




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