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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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Unread postAuthor: rp181 » Sat Dec 15, 2007 9:18 pm

im trying to keep as low as possible, and i just found an weldeing kit :)

i wont be able to shoot fast, right now im getting the H/o2 mic directly from electrolysis.
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Unread postAuthor: Eddbot » Sat Dec 15, 2007 9:28 pm

keep what as low as possible? cost? be safe and pay a little more money for alot more reassurance, i would much rather pay an extra ten bucks than have something blow up in my face

Eddbot, I'm pretty sure a soda can can't handle 250 PSI.


i never said it couldn't
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Unread postAuthor: rp181 » Sat Dec 15, 2007 9:32 pm

low cost as possiable, i think ile go with an entirerly new combustion chamber, possiblly all metal, most of it being copper.
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Unread postAuthor: TurboSuper » Sat Dec 15, 2007 9:57 pm

rp181 wrote:low cost as possiable, i think ile go with an entirerly new combustion chamber, possiblly all metal, most of it being copper.


Sounds like an oxymoron to me :lol:
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Unread postAuthor: DYI » Sat Dec 15, 2007 10:04 pm

Copper isn't that expensive. Brass or titanium would be much worse.
As for using a copper combustion chamber, it sounds like a fine idea. Steel would be cheaper and last longer, and is just as strong (or moreso) than the equivalent in copper. And you don't weld copper, you solder it, or use compression/flared fittings. Either that, or you could use Just For Copper adhesive, which is relatively strong (rated for 500 psi), and possibly quicker than soldering (with no tools required).
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Unread postAuthor: rp181 » Sun Dec 16, 2007 10:39 am

yep, i just gotta ask my home deopt if they will cut the tubes to specified lengths, i have no metal shop or anything.

for a BBQ lighter, what is a good length for the spark, right now im thinking of medium, to get a bright blue spark
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Unread postAuthor: DYI » Sun Dec 16, 2007 10:58 am

yep, i just gotta ask my home deopt if they will cut the tubes to specified lengths, i have no metal shop or anything.


If you don't even have a hacksaw, then I strongly suggest that you get one. They are cheap, widely available, and absolutely necessary if you are working with metal tubing.
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Unread postAuthor: rp181 » Sun Dec 16, 2007 11:17 am

i have a hack saw, but i might as well have them cut in 30 sec then me cutting :). they usually cut other stuff for free
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