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Posted: Sat Aug 19, 2006 10:38 pm
by noname
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.
Posted: Sat Aug 19, 2006 10:55 pm
by MrCrowley
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
Posted: Sat Aug 19, 2006 11:10 pm
by noname
Salad's idea for a piston would be like 10 pounds and a diaphragm is just a lot simpler anyways.
Posted: Fri Oct 13, 2006 1:06 am
by frankrede
Sorry to kick the topic but i deem it neccessary.
Was this cannon ever built?
Posted: Fri Oct 13, 2006 8:12 am
by mark.f
It takes a while to build something like this. Give him some slack.
Posted: Fri Oct 13, 2006 5:44 pm
by frankrede
Its been a couple of months, I just want to know on its progress
Posted: Sat Oct 14, 2006 7:03 pm
by noname
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.
Posted: Sat Oct 14, 2006 11:53 pm
by SquishY
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.
Posted: Sat Oct 14, 2006 11:55 pm
by killagorrila99
Lol More like a 30 day job to get it to 1psi.
Posted: Sun Oct 15, 2006 3:13 am
by SquishY
LoL, I like my baby one, 10 pumps and its at 45psi
Posted: Sun Oct 15, 2006 11:05 am
by noname
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.
Posted: Sun Oct 15, 2006 12:07 pm
by schmanman
my bb rifle goes to 200-210 psi with 15 pumps.
Posted: Sun Oct 15, 2006 5:55 pm
by noname
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.
Posted: Sun Oct 15, 2006 8:23 pm
by pyromanic13
you could use a nerf ball for a piston
Posted: Sun Oct 15, 2006 9:05 pm
by SquishY
I doubt a Nerf ball would be rigid enough to hold any signifigant(sp) ammount of pressure.