Christmas '07 Combustion Project

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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STHORNE
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Wed Jan 23, 2008 6:44 pm

wow, very nice job.. very clean and nice, compact set up.

one of my favorite guns for reference now lol.

i'm definitely book-marking this page! one question though....

how did you set up the circuit board for the spark gaps? I've been trying to make the same concept but its unpredictable and only works some of the time.

could you please post blue prints of the piece so i can see how you made it?

thanks -- sthorne
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starman
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Thu Jan 24, 2008 1:18 am

sthorne wrote: how did you set up the circuit board for the spark gaps? I've been trying to make the same concept but its unpredictable and only works some of the time.

could you please post blue prints of the piece so i can see how you made it?
thanks -- sthorne
I got the idea for this from Latke's site ( http://www.burntlatke.com ). I have no blueprint for the board. I just used a general purpose electronic breadboard from Radio Shack... here's the pic...
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I used only the bottom 1/2" or so of the board and used the holes for mounting on the stungun conducting  screws. It easily took the curvature of the pipe.
I used only the bottom 1/2" or so of the board and used the holes for mounting on the stungun conducting screws. It easily took the curvature of the pipe.
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mark.f
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Thu Jan 24, 2008 6:59 am

Looks great! I agree with the original comment earlier... most people don't have the patience to sit down and build a nice cannon like this. Hell, my next project has about three different types of pipe in the general chamber area, painted fittings from a former project which are scratched everywhere from the pipe wrenches, and it's all gonna be thrown on a stand made of 2X6"s hinged together so I can fold it all up. In short, my next project will look like a Charlie Foxtrot.

Most people, like me, have a bit of ADD when it comes to building cannons. :P I get about halfway through what I PLAN to build, and then see a shortcut and take it in a flash.

Once again great job!

LSU!

Just kidding. Even though I'm going there next year for school, I don't really care about their football. People are a bit stupid around here when it comes to that, actually...
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koolaidman
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Sun Jan 27, 2008 9:56 pm

Rit im guessing? im guessing your son is in engineering, just curious. Im entering ME there next fall.
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starman
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Mon Jan 28, 2008 12:59 am

koolaidman wrote:Rit im guessing? im guessing your son is in engineering, just curious. Im entering ME there next fall.
Yup, well Computer Science actually....like father like son ehhh... He's presently got the gun over at his apartment on campus, wowing all the guys over there...leaving me spudgunless for the moment... :( That's OK I'm working on my own...
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