SpudFiles

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????

Bbq Sparkers? I think that would be your best bet, and as for fuel propane wouldnt be a bad idea.

ok il try that

whats the best way to deliver the propane into tht chamber

Use deoderent, have a look here for UK supplies ideas www.uksgc.co.uk

whats the best way to deliver the propane into tht chamber

helppp

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.

You could make a propane meter, or just make guesses on the amount you put in and just use a propane torch.

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.

KIR

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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.

Ya There is no way he is getting that.
You cant even get one jump 6" apart.Or even 1" in that case.

Maybe he has three sparks 6" apart.

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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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.