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need some help

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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need some help

Unread postAuthor: winters921 » Sun Jun 03, 2007 1:08 pm

i would like to make a nerf pocket rocket shooter i have got a 3/4 sprinkler valve i have modded it already. i would like it to be stright but small any ideas. i play semi pro scenario paintball and will use this gun to take out paintball tanks.
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Unread postAuthor: hi » Sun Jun 03, 2007 1:17 pm

all you need is:

a 2'' to 3/4'' bushing.

3/4'' pipe

2'' pipe.

2'' coupler.

3/4'' male adaptor

3/4'' nipple.

2'' end cap

aand about $10 for the parts above. good luck.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: winters921 » Sun Jun 03, 2007 2:28 pm

what should the barrel be from what i hear 2 inch wide is good but i can make it what ever i want right??

and how about the air chamber
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Unread postAuthor: hi » Sun Jun 03, 2007 2:53 pm

i ment for the 2'' to be the chamber and the 3/4'' the barrel. its your gun, you deside.

i was just saying that if i built it thats how would do it.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: spudthug » Sun Jun 03, 2007 3:01 pm

@ hi

he wants it to be able to shoot nerf rockets...dont they fit in 1 1/2? or maybe 2 but iahvent ever shot one..ask someone who shoots them alot
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: noname » Sun Jun 03, 2007 5:04 pm

Building from the back to the front:
2" End Cap
2 feet of 2" PVC
2" Coupler
2" x 3/4" bushing
3/4" PVC (2" long)
3/4" male adapter
3/4" sprinkler valve
3/4" male adapter
3/4" PVC (2" long piece)
2" x 3/4" bushing
2" coupler
3 feet of 2" PVC
Shouldn't cost more than $30, and $30 is Bay Area prices, almost anywhere else will be much cheaper.
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Unread postAuthor: winters921 » Sun Jun 03, 2007 5:39 pm

sounds good turns out a nerf rocket has a two inch dia i will be doing this over the corse off this week i would also like to know how to fit a pressure gauge into that. at my local paintball field i will have to chrono it so i need to know an exact pressure so i can see what the perfect chrono will be. thanks for the help
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Unread postAuthor: noname » Sun Jun 03, 2007 6:54 pm

Pressurize it with a bike pump that has a pressure guage on it.
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Unread postAuthor: hi » Sun Jun 03, 2007 8:42 pm

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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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