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just wanna build a small simple blaster, need ignition help

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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just wanna build a small simple blaster, need ignition help

Unread postAuthor: F.E.A.R._Sniper » Sat Apr 26, 2008 2:13 pm

ok so ever sinced i found out that paintball pnuematic tubing will fit on the tip of a lighter i have wanted to build a small launcher using lighters as a combination fuel injector/ fuel shut off valve/ and fuel canister. I was thinking about taking some 3/4" schedule 80 pvc pipe and drilling a bunch of holes for about 6-8 inches down the length of the pipe. after that i was gonna place the end of the pipe with all the holes down inside a soda bottle. there would be barbs placed on the bottle and all you would have to do is press the button on the lighter to fill the chamber with gas.

I am having trouble in coming up with an idea to ignite this. do any of you guys have an idea of what i can do for ignition.
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Unread postAuthor: hi » Sat Apr 26, 2008 2:29 pm

use a paper clip and a bbq ignitor. not very complicated. im not going to tell you what to do with the bbq ignitor and the paper clip, thats for you to figure out.
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Unread postAuthor: F.E.A.R._Sniper » Sat Apr 26, 2008 2:33 pm

well my major problem is that the bottle kinda flimsy, i know how to make a spark gap
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Unread postAuthor: jimmy101 » Sun Apr 27, 2008 3:42 pm

Build the spark gap onto the sch80 piece of pipe?

You could just gently heat a couple pins and push them through the soda bottle's wall. Then, a big-ol glob-a epoxy<sup>TM</sup> (liquid nails, hot melt glue, caulk ....) on the outside of the bottle to hold the pins in place.
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Unread postAuthor: JDP12 » Sun Apr 27, 2008 3:44 pm

yea i say waht jimmy101 says... but it would be messy
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Unread postAuthor: TwitchTheAussie » Sun Apr 27, 2008 7:13 pm

Just hurry up stick some nails in glue em up nand light that sucker up real nice. You got what you needed.
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Unread postAuthor: F.E.A.R._Sniper » Sun Apr 27, 2008 8:47 pm

thanks jimmy, i think i will go with building the spark gap onto the pvc pipe
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