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pnuematic sniper

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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pnuematic sniper

Unread postAuthor: ballad of NJ » Sat Feb 17, 2007 2:29 pm

Just finished this today. I havent been able to get any damage pics yet. First modded sprinkler though so thats a plus. My friend and I are haveing a build of that is why I made this gun. He's going down :twisted: :twisted: :twisted:

I used half inch pipre and 3 inch chamber. I used epoxy because my mom doesnt trust me with primer.
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Attachments
pnuematics 001.jpg
theres a nickle in the T for no decreased flow
pnuematics 002.jpg
different angle
pnuematics 003.jpg
two chambers
pnuematics 005.jpg
modded lawn genie
Last edited by ballad of NJ on Sat Feb 17, 2007 2:49 pm, edited 1 time in total.
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Unread postAuthor: MrCrowley » Sat Feb 17, 2007 2:38 pm

Ha, Funny looking design you have there. For the other part of the chamber(not the big tanks) it would look better if you used some bigger dia pipe and it might be more stable. Other then that nice cannon but you used Bell reducers which are DWV 99% of the time.

Oh and any specs on the gun?

Barrel length
Barrel Diameter
Chamber Volume
Chamber Diameter
Ammo
PSI

Edit: Nickel in the tee? Is that the tee thats holding the bi-pod? If so you should of bored(sp?) out the tee so the barrel can fit straight through without cutting the barrel and then re-joining it which will slow down the projectile.

Also did you use primer? I can only see glue stains.

3rd Edit: Your barrel can be HEAPS longer.
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Last edited by MrCrowley on Sat Feb 17, 2007 2:44 pm, edited 2 times in total.
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Unread postAuthor: ballad of NJ » Sat Feb 17, 2007 2:40 pm

They were restoking home depots pvc when i got the reducers so i was rushed. Ammo is marbles AA batteries marshmellows anything that fits 1/2 inch. Why do you want me to do math?

Its my second gun. My mom doesnt trust me with primer yet.

I also didnt like the longer barrel made it to flimsy.

Yes the nickles is in the T conecting with the bipod
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Unread postAuthor: MrCrowley » Sat Feb 17, 2007 2:47 pm

Chamber volume is the only one the requires math work and thats why we have calculators. Also making your posts neat and tidy with all the information will help alot of newbies out and stop them digging up old topics or asking basic questions etc. Also I had no idea that was 1/2" pipe till you just told me then.

Your mum doesnt trust you with primer? Why? It probably is poisonous but you have to be really stupid to drink the stuff and if your worried about inhaling it just wear a mask.
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Unread postAuthor: ballad of NJ » Sat Feb 17, 2007 2:50 pm

Ive told her i would wear a mask. Shes always saying. "our basement isnt well enough insulated enough to use primer". i hate it
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Unread postAuthor: judgment_arms » Sat Feb 17, 2007 2:52 pm

ballad of NJ wrote:...My mom doesnt trust me with primer yet...


Why? I must be missing something here…
Anywho, nice gun, very original, I like the 4-way flash hider.

Edit: never mind, type to slow.
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Last edited by judgment_arms on Sat Feb 17, 2007 2:55 pm, edited 1 time in total.
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Unread postAuthor: MrCrowley » Sat Feb 17, 2007 2:54 pm

Can't you do it outside? Or in a garage? Too cold?
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Unread postAuthor: judgment_arms » Sat Feb 17, 2007 3:00 pm

Yeah, your not suppose to use primer OR glue with out proper ventilation, does your basement have windows? If so open two, one on each side of the room, and you all set. Tell your mom that by not using primer your actually making it less safe.
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Unread postAuthor: iknowmy3tables » Sat Feb 17, 2007 3:10 pm

insulated!! INSULATED what does she mean but insulated, you mean ventalated, I think it's more unsafe to not prime your joints than it is to be priming them all day long, your its about as unsafe as your moms makeup remover, cause the main ingredient in both is acetone, I don't think she knows anything about PVC or household chemical

nice gun by the way, not that cost efficent but it still looks cool
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Unread postAuthor: SpudBlaster15 » Sat Feb 17, 2007 3:12 pm

I really hope you cleaned and sanded the surfaces of the pipe and fittings before applying the epoxy, otherwise, the gun will blow apart sooner or later. PVC cement actually fuses the pipe and fittings together by means of dissolution and re-hardeneing, wheras an epoxy bond is soley reliant on surface adhesion of two materials.

Nice job using DWV reducers, I wouldnt take it over 40psi.
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Unread postAuthor: ballad of NJ » Sat Feb 17, 2007 3:16 pm

Iknow sorry i ment ventallated i was brain dead ok? Also your right about my mom not knowing anything about PVC.
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Unread postAuthor: mopherman » Sat Feb 17, 2007 3:42 pm

i realy hope you dont blow the crap out of yourself without using primer. I just put together my gun and its gonna beat you so bad.
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Unread postAuthor: noname » Sat Feb 17, 2007 5:32 pm

Can't believe no one noticed this, but why is your barrel bent at an angle, or do the pictures just make it look that way?
SpudBlaster15, DWV isn't actually that bad, it just has shorter socket depth. But with no primer I'd say it wasn't too smart. DWV NEEDS to have correct solvent welds, or there's too much chance of the chambers being blown off.
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Unread postAuthor: Killjoy » Mon Feb 19, 2007 1:48 am

nothin like gettin high off of pvc primer and cement fumes....
Ive forgotton to use primer before and ive never had any problems with the gun comeing apart (and in each intsnace of memory lapse, I either super glued, pvc cemented, or epxoyed the peices together.) But keeping the operating pressure low is probabably for the best, cause unlike me, you probably value your life.
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Unread postAuthor: supa_midget » Tue Feb 20, 2007 4:01 am

Lol dude, your mum doesnt trust with primer but shes letting you make a gun. Sorta ironic.
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