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Cannon ignition question

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Cannon ignition question

Unread postAuthor: vng21092 » Fri Dec 20, 2013 5:16 pm

Would this create a spark gap? http://imgur.com/OaGUpCK,N7QRZq1 The first image is the chamber, that is a stripped solid piece of 12 gauge wire. The second image is a screw cap with a bolt and nut on it that will be connected to a wire from a piezo, will this create a spark?
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Re: Cannon ignition question

Unread postAuthor: PeteS » Fri Dec 20, 2013 7:12 pm

vng21092 wrote:Would this create a spark gap? http://imgur.com/OaGUpCK,N7QRZq1 The first image is the chamber, that is a stripped solid piece of 12 gauge wire. The second image is a screw cap with a bolt and nut on it that will be connected to a wire from a piezo, will this create a spark?


One wire from the piezo to each and it will spark if the gap is small enough. It would seem like a consistent gap is unlikely with that setup.
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Re: Cannon ignition question

Unread postAuthor: jackssmirkingrevenge » Sat Dec 21, 2013 8:42 am

Looks good, make sure you have around 1/4" between bolt and wire.
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