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easy first gun for sister

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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easy first gun for sister

Unread postAuthor: mopherman » Sun Feb 25, 2007 12:42 pm

My 11year old sis wants to make a pneumatic. She wants it to hold up under 50 psi and shoot marbles at a good speed. what design would you reccomend for a first timer?
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Unread postAuthor: PVC Arsenal 17 » Sun Feb 25, 2007 12:53 pm

You can make a basic ball valve gun. 2 inch chamber, 1/2 inch barrel. Tire valve, guage...
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Unread postAuthor: SPUDDY6 » Sun Feb 25, 2007 1:19 pm

ain't she a little young
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Unread postAuthor: mopherman » Sun Feb 25, 2007 1:31 pm

im gonna help her glue and stuff. she saw my gun and she wanted one to
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Unread postAuthor: squeaks » Sun Feb 25, 2007 1:37 pm

and make sure to use pressure rated parts.
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Unread postAuthor: mopherman » Sun Feb 25, 2007 1:44 pm

I know what Im doing, and ill be supervising her when she puts everything together.
but thanks for the tip, squeaks good to be safe!
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Unread postAuthor: SpudBlaster15 » Sun Feb 25, 2007 2:59 pm

I would suggest using a modded 1" sprinkler valve, a 15" long, 1.5" Sch 40 PVC chamber, and a 4' long, 1/2" Sch 40 PVC barrel. This launcher will yield great performance, and will require minimal time to pressurize.
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Unread postAuthor: ballad of NJ » Sun Feb 25, 2007 3:38 pm

His sisters 8 really
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Unread postAuthor: judgment_arms » Sun Feb 25, 2007 4:15 pm

You’re never too young to learn how to shoot! 11 or 8, it doesn’t matter, as long as you can hold the gun you should be taught how to safely use it. If you shoot it, then you know it’s not a toy, you treat it with the respect it deserves. If you’re never taught about guns, you’ll end up playing with one, that’s when someone gets hurt.
Don’t forget, a spud gun is still a gun.
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Unread postAuthor: mopherman » Sun Feb 25, 2007 4:28 pm

shes 9, but shes smart. I thought 11 was a little more respectable
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Unread postAuthor: judgment_arms » Sun Feb 25, 2007 5:07 pm

Well, age has little to do with it, I wouldn’t trust my neighbor (he's 13 or 14) with a rubber band, let alone a spud gun. If you think she’s smart enough than give her her own gun.
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Unread postAuthor: frankrede » Sun Feb 25, 2007 5:18 pm

Give her a basic ball valve cannon that she can shoot confetti and glitter out of!
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Unread postAuthor: mopherman » Sun Feb 25, 2007 5:19 pm

shes into destroying cardboard and cans( not glitter )
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Unread postAuthor: badkarma » Sun Feb 25, 2007 8:43 pm

Probably off topic, but discussing about 2" pressure chamber, what is the length recommended when using a 2" pressure chamber to launch a nerf rocket under 230fps? Keeping it under 30-60 psi.

I'm using a rain bird CP-100 sprinkler valve. I have one working with my other launcher, but that one has a 3" pressure chamber and its a over under design. The mod on the CP-100 valve was simple to do so I'm using it for my next launcher. This time I want to build the launcher in one length. Barrel in front, valve center, and at the back is the pressure chamber. All in 2" pvc. I also want to install a gauge, pressure relief valve, and schrader valve on the pressure chamber. My design will have the barrel shorter so I can bring the sprinkler valve forward arm length, so I can attach a air blowgun trigger to the sprinkler valve. Basically a bazooka design.
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Unread postAuthor: judgment_arms » Sun Feb 25, 2007 11:05 pm

Google GGDT...
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