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Pilot lights tend to get blown out by the rush of air up the tube. I'm thinking along the lines of electric arc type starters. But they need to be both compact enough to fit in the tube without blocking too much air flow, and quiet in operation. It's for the myriad details like this, and the safety issues as mentioned by Old Picker, that I need professional help.
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Hi tcowdroy,
Cant help with anything technical at all I'm afraid, wouldn't even know where to look but all the best with the project as it seems to be a true thing of beauty if you can get it up and running (without killing yourself)
good luck!