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Ignition

A place to ask general spud cannon related questions.
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Unread postAuthor: v3ngence » Thu Apr 14, 2005 7:15 pm

Hey, I've been building air cannons for a couple years and wanted to check out the flip side of spud gunning. My combustion gun is a 2" barrel and a 4" x 12" chamber w/ propane injection. The gun works but it sometimes takes a lot of tries to ignite it. Im pretty sure i need to alter the mixture but I was wondering if the spark might not be *strong?* enough. Im using the sparker from a BBQ lighter and yea I was just wondering if its possible for a weak spark NOT to ignite the mix.
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Unread postAuthor: iamthewalrus » Thu Apr 14, 2005 7:19 pm

thats very possible with a bad mix, there can be to much fule for the spark making it will not ignite. try changing the mix a little, or maybe its the sparker.
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Unread postAuthor: v3ngence » Thu Apr 14, 2005 7:32 pm

when i tested it it sparked 20 outa 20 times so ill jus tinker with the mix, thnx
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Unread postAuthor: Rehab Ralph » Fri Apr 15, 2005 1:31 pm

Even though the sparker is sparking 20 out of 20 times doesnt mean that you have a hot enough spark to ignite the fuel.
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Unread postAuthor: iamthewalrus » Fri Apr 15, 2005 2:19 pm

yeah, if ur mix isnt the problem u should try a stronger spark, like a stun gun or someting, or try adding a chamber fan to mix the fuel better if u dont already have one.
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