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I've decided what to do with the 8"

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: noname » Sat Aug 19, 2006 10:38 pm

Jeez you're lucky. 10' of 1 1/2" pressure rated is like 8 bucks or something. 2" is $2.25 a foot or 10 feet 10 bucks. I'm not even sure if I can get pressure rated 4". One store has only 10 foot lengths that are pressure rated and only go up to 2", and the other store I go to has 20 foot lengths of up to 4" and 10 foot lengths up to 2" but the 10 foot lengths aren't pressure rated and I'm not sure if the 20 foot lengths are.
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Unread postAuthor: MrCrowley » Sat Aug 19, 2006 10:55 pm

noname wrote:To everyone posting on this topic, I'm using a DIAPHRAGM!

i knew that but we were trying to find things that could be used for a piston because you said you couldnt find anything thats the reason why your going diaphragm
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Unread postAuthor: noname » Sat Aug 19, 2006 11:10 pm

Salad's idea for a piston would be like 10 pounds and a diaphragm is just a lot simpler anyways.
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Unread postAuthor: frankrede » Fri Oct 13, 2006 1:06 am

Sorry to kick the topic but i deem it neccessary.
Was this cannon ever built?
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Unread postAuthor: mark.f » Fri Oct 13, 2006 8:12 am

It takes a while to build something like this. Give him some slack.
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Unread postAuthor: frankrede » Fri Oct 13, 2006 5:44 pm

Its been a couple of months, I just want to know on its progress
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Unread postAuthor: noname » Sat Oct 14, 2006 7:03 pm

Nothing at all has happened. I might just leave the pipe sit there another couple months, who knows? I just really don't have enough money to use on that right now and I don't have an air compressor, so pumping it up with a bike pump would be kind of tedious.
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Unread postAuthor: SquishY » Sat Oct 14, 2006 11:53 pm

Kind of tedious, more like a day job. A shop here sells outside diameter caps to match pipes, being that a 4" cap will fit perfectly into a 4" pipe. this could be a piston. Sorry for the suggestion of something other than a diaphram but this would be quite the perfect idea.
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Unread postAuthor: killagorrila99 » Sat Oct 14, 2006 11:55 pm

Lol More like a 30 day job to get it to 1psi.
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Unread postAuthor: SquishY » Sun Oct 15, 2006 3:13 am

LoL, I like my baby one, 10 pumps and its at 45psi :P
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Unread postAuthor: noname » Sun Oct 15, 2006 11:05 am

All my other guns take like 15 pumps to get to 80, but a 20 foot long piece of 8" pipe? That would take just too long. Or I could buy a Co2 regulator, but it would probably use a whole 20 oz tank to get it to 40 psi.
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Unread postAuthor: schmanman » Sun Oct 15, 2006 12:07 pm

my bb rifle goes to 200-210 psi with 15 pumps.
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Unread postAuthor: noname » Sun Oct 15, 2006 5:55 pm

That's because it shoots BBs. If your trying to shoot some 4" fruit with your fatty cannon it takes a few more than 15-20. :lol:
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Unread postAuthor: pyromanic13 » Sun Oct 15, 2006 8:23 pm

you could use a nerf ball for a piston
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Unread postAuthor: SquishY » Sun Oct 15, 2006 9:05 pm

I doubt a Nerf ball would be rigid enough to hold any signifigant(sp) ammount of pressure.
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