new cannon

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.
spanerman
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Fri Sep 22, 2006 12:08 pm

hi im building a cannon (my first full scale). it will be a 40cmX4'' chamber and a 150cmx1.5'' barrel and am wondering what we could youse as an igniting the fuel it must be available in the uk as we cant get lantern igniters and stun guns heelp. also i think that long nose lighters may not be powerfull enough
(not sure) what can i use????
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Torch
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Fri Sep 22, 2006 12:21 pm

Bbq Sparkers? I think that would be your best bet, and as for fuel propane wouldnt be a bad idea.
spanerman
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Fri Sep 22, 2006 1:08 pm

ok il try that

whats the best way to deliver the propane into tht chamber
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LucyInTheSky
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Fri Sep 22, 2006 3:00 pm

Use deoderent, have a look here for UK supplies ideas www.uksgc.co.uk
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034936
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Sun Oct 22, 2006 9:03 pm

whats the best way to deliver the propane into tht chamber
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judgment_arms
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Sun Oct 22, 2006 9:17 pm

Here friend try this link it’s to the combustion section.
http://www.spudfiles.com/forums/viewforum.php?f=27&
I’ve never made a combustion otherwise I’d help ya more.
squeaks
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Sun Oct 22, 2006 11:49 pm

You could make a propane meter, or just make guesses on the amount you put in and just use a propane torch.
escape
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Wed Oct 25, 2006 1:59 am

Best way to get the optimum amount of propane into the chamber is using and propane meter. Instructions to make one can be found here http://www.burntlatke.com/lp.html

Can be difficult to understand/construct, but well worth it. You can order one from http://www.spudtech.com/detail.asp?id=42 also, but I find that one a bit expensive.

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SpudBlaster15
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SpudStuff
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Thu Oct 26, 2006 11:34 pm

That is 18 inches total and would take ~4,572,000 volts (at the standard of 10000 volts per CM) in an air environment, some how I don't believe that statment.
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frankrede
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Fri Oct 27, 2006 12:13 am

Ya There is no way he is getting that.
You cant even get one jump 6" apart.Or even 1" in that case.
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SquishY
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Fri Oct 27, 2006 1:06 am

Maybe he has three sparks 6" apart.
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EatSpud!!!
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Tue Oct 31, 2006 2:49 am

SpudBlaster15 wrote: I am using a $2 long nosed lighter wired to 3 (yes three) gaps, each 6" apart, and it fires every time. I think they are plenty powerful.

no offence but that sounds like a load of b.s

i tried using the long nose lighter to spark 50mm gap in a minigun (medium sized about 50mmx200mm) and it never happened.
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SpudBlaster15
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Last edited by SpudBlaster15 on Wed Jul 14, 2021 11:36 am, edited 1 time in total.
squeaks
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Thu Nov 02, 2006 7:38 pm

Spudblaster, when you say three gaps 6" apart people don't think, "oh, that must mean that there are 3 little gaps 6 inches apart." Besides, what good does the 6" give us? We just want to know how far your spark will jump.
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