Dual BBQ sparks

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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daberno123
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Thu Dec 27, 2007 3:49 pm

I was looking on the spudtech FAQs and saw the thing about dual sparks but didn't understand the diagram. I searched here but couldn't find anything.

Is it like this?

I think it is the first one
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ignition2.JPG
ignition2.JPG (14.7 KiB) Viewed 1884 times
or this?
or this?
ignition1.JPG (15.3 KiB) Viewed 1884 times
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paaiyan
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Thu Dec 27, 2007 3:52 pm

The first one. The only wires you need are the ones from the clicker. On the bottom side there you can just run the wire inside, no need to go outside with that one.
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So it should look more like this.
So it should look more like this.
afg.JPG (3.62 KiB) Viewed 1878 times
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daberno123
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Thu Dec 27, 2007 3:55 pm

won't the combustion melt the rubber insulation if i put the wire inside?
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MrCrowley
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Thu Dec 27, 2007 3:57 pm

No.
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paaiyan
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Thu Dec 27, 2007 4:00 pm

Even if it did melt it, doesn't matter.
"Who ever said the pen was mightier than the sword, obviously, never encountered automatic weapons."
-General Douglass MacArthur

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daberno123
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Thu Dec 27, 2007 4:00 pm

alright i still don't really underrstand why but ill trust u. I still don't get how chamber fans aren't melted into globs of plastic but whatever
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paaiyan
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Thu Dec 27, 2007 4:02 pm

Because the heat from the combustion last for only a few milliseconds. To melt something doesn't require the surrounding atmosphere to be the temperature required, what has to happen is the substance needs to be heated to that temperature. The combustion lasts only a few milliseconds, which isn't nearly long enough to transfer enough energy to the plastic to melt it. They'll get soot on them, but not much more.
"Who ever said the pen was mightier than the sword, obviously, never encountered automatic weapons."
-General Douglass MacArthur

Read my dog's blog - Life of Kilo
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daberno123
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Thu Dec 27, 2007 4:07 pm

ahh now i understand
thanks
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