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cold BBQ igniter?

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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cold BBQ igniter?

Unread postAuthor: Can-O-Man » Wed Nov 22, 2006 4:41 pm

i live in michingan it is about 40 -50 degrees outside, will it effect the BBQ igniter? because i dont get a spark eveytime i push the button (only about 1 out of 5) also is it cold enough for the hairspry not to work? if it doesn't effect it. is there any other reasons why it wont work?
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Unread postAuthor: MisterSteve124 » Wed Nov 22, 2006 5:08 pm

No it wouldn't affect the spark but pvc isn't safe to use in cold weather anyways. Maybe the gap is too far, it's sorta hard to tell by the picture.
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Unread postAuthor: jrrdw » Wed Nov 22, 2006 7:34 pm

Iv'e seen bar-b-que ignighters be weak to faulty before. Try useing another one.
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Unread postAuthor: Flying_Salt » Wed Nov 22, 2006 7:42 pm

PVC can become brittle in cold weather, and you may need to clean off the sparkers if you're using hairspray, it leaves a sticky residue.
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Unread postAuthor: SpudBlaster15 » Wed Nov 22, 2006 9:11 pm

Cooler air is denser, and thus your maximum spark gap is reduced. Try bringing the electrodes in closer.
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Unread postAuthor: Can-O-Man » Wed Nov 22, 2006 11:53 pm

thanks MisterSteve124 it was the gap (or so i think) i put in two longer electrodes and it i dry tested it (with a mirror) and it sparked every time. i couldn't launch somthing because it was 11:30 and i have neighbors :( but i'm confident that it is going to work.
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Old Electrodes

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New electrodes

sorry if there are any misspellings
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Unread postAuthor: Can-O-Man » Sun Nov 26, 2006 11:50 am

no it didn't work. any more sugestions?
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Unread postAuthor: Bluetooth » Sun Nov 26, 2006 1:46 pm

I'm not really sure what i'm talking about but couldn't the spark be to weak? Different materials have different flash points (aka the temp at which they ignite).
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Unread postAuthor: SpudBlaster15 » Sun Nov 26, 2006 1:51 pm

If you are getting a consistant spark when "dry" testing the igniter, it is unlikely that it is the culprit. Your problem probably lies within the fuel mixture. I would start by using a better fuel. Hairspray is the worst fuel you can use.
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Unread postAuthor: Can-O-Man » Sun Nov 26, 2006 2:28 pm

the what are the good fuels?
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Unread postAuthor: SpudBlaster15 » Sun Nov 26, 2006 2:36 pm

I reccomend starting fluid.
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Unread postAuthor: MikeNice » Wed Dec 06, 2006 11:51 pm

When you're talking about fuels it isn't the liquid that burns, it is the vapor. Hairspray doesn't evaporate quickly OR completely and has a lot of other garbage in it so it just doesn't make an even halfway decent fuel. You need to have a fuel that evaporates (alcohols, ether) or is already a gas (propane, MAPP). Good, cheap, simple fuels include starting fluid, Tag body spray, (my personal favorite), or 91% or higher isopropyl alcohol sprayed in a fine mist. Propane and butane are very popular and excellent fuels but I haven't used either of them very much so most of my knowledge about them is second hand or basic science. Do me one favor though. Don't take your plastic gun outside in Michigan if it's cold out. PVC, like any other plastic will become britle.
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