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X-26 for ignition

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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Unread postAuthor: jimmy101 » Mon Aug 20, 2007 9:36 am

Surlyman wrote:Good info to keep the spark gap the same as the stu gun. I'll be going to stun gun ignition after my bbq button dies


Actually, that is not what I meant. To keep the wires from sparking between themselves (thru the insulation), the wires need to never get any closer together than the spark gap. If you have a 1/8" spark gap in the spudgun the wires should never get any closer than that to each other. Generic wire insulation is usually only rated to 300V or so, at 100KV the insulation is not very effective. If you hold onto the insulated wires and fire the stungun you will get a shock, though not nearly as bad as if you touched the stunguns gap.

The actual gap in the spudgun should be a lot less than the gap on stungun. My "100KV" stungun has a 3/4" gap. It won't actually spark that gap, which means it isn't putting out anywhere near 100KV, probably closer to 20KV. (I suspect the spark is jumping between things inside the gun.)

The gap in the gun should be smaller than the main gap and secondary gap (backup gap, safety gap?) of the stun gun. You want the spark jumping your spudgun gap, not the gaps on the stungun, or somewhere inside the stungun.

Another reason to keep the spark gap small, compared to the stungun's gap, is that it'll keep sparking even as the stungun's battery goes dead.
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Unread postAuthor: sjog » Tue Aug 21, 2007 8:34 pm

Surlyman
Hey do us a favor and keep an eye out for CannonCreator, he needs some special attention. His avatar says it all.
Oh, and welcome have a blast!
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Unread postAuthor: MisterSteve124 » Tue Aug 21, 2007 8:53 pm

The wires are probably insulated enough to prevent that from happening since it is meant to have a lot of voltage.
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Unread postAuthor: jimmy101 » Wed Aug 22, 2007 10:41 am

MisterSteve124 wrote:The wires are probably insulated enough to prevent that from happening since it is meant to have a lot of voltage.


WTF?

What wires?

The taser's wire are probably very poorly insulated, heck they might not be insulated at all.

It takes pretty specialized insulation to withstand tens of thousands of volts. Even the thick insulation on a sparkplug wire is will not keep it from leaking if the cables get close enough to anything that is grounded.
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