tiny mini

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.
cardinals08
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Mon Jan 23, 2006 10:53 pm

I made a mini out of a pen tube for the chamber and a 3.5 inch 1/8 inch ID piece of clear tube. I haven't been able to fire it yet cause it is nearly impossble to get the fuel/air mix right. I think it is because the chamber is too long and narrow. the spark jumps the whole width of the chamber so the spark isnt the problem. I got it to fire a couple times with the cap off but I couldnt see a flame, just heard a small noise, only about as loud as clicking the piezo. I hope to get it firing, I know the range will only be about 20 feet tops. Ill post some pics tomorrow.
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Urban Ninja
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Tue Jan 24, 2006 12:52 am

What fuel are you using? For stuff like that I just modify a normal disposable lighter.
cardinals08
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Posts: 270
Joined: Thu Dec 22, 2005 5:07 pm

Tue Jan 24, 2006 8:59 am

Im using butane, I should probably get it so I can but the fuel in at the bottom or middle rather than up at the top
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