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barrel sealing piston gun. Gen. 2, sniper variant

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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Unread postAuthor: to_live » Tue Mar 20, 2007 4:03 am

that is an insane looking gun!!! i really do like it alot! but i dont understand how the "backwars barrel sealer" works could someone please explain to me how it works! with a diagram maybe? im kind of new to spudgun's
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 20, 2007 4:24 am

Hawkeye wrote:You mean like one where the projectile is actually resting against the piston valve? :)


Amen to that brother, barrel sealing coaxials forever!

Image

:D

edit: what pressure are you using? that setup looks like it could easily take 300 psi+, I recommend you invest in a shock pump to fullfill your design´s performance potential.
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Unread postAuthor: Hawkeye » Tue Mar 20, 2007 7:44 am

I have pumped my small copper gun up to 300 plus with my homemade high pressure pump but I admit that I am just slightly nervous about the blowgun at that pressure. Particularly since the gun forms the handle of the pump and the regular handle forms the footrest.
I can actually vent it with a schrader so I think I'll hook up a trigger to depress the valve stem instead. They are rated far higher.
edit: It doesn't actually fill through the schrader as well. I'm not going to take apart a trigger system every time I want to fill it. :)
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 20, 2007 7:49 am

IIRC schrader valves are good for 900 psi. So far I've only ever used schrader valves to actuate my exhaust valve designs, up to the 1 inch piston in my 3/4" cal launcher.
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Unread postAuthor: Extrusion » Wed Mar 21, 2007 7:56 pm

Very nice gun indeed!

Where did you get the CO2 thing at? i need to find me one. :lol:
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"No living person is a virgin because life screws us all." - Extrusion
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Unread postAuthor: A-98 » Wed Mar 21, 2007 8:00 pm

~Jack, what do you draw your images in? they look kinda rough at the edges, like pencil, but that aint scanned. you have a original style. me likes
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 21, 2007 8:03 pm

A-98 wrote:~Jack, what do you draw your images in? they look kinda rough at the edges, like pencil, but that aint scanned. you have a original style. me likes


I draw my diagrams with a black pen on paper, scan them as lineart and then tart them up with paintbrush.
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Unread postAuthor: A-98 » Wed Mar 21, 2007 8:14 pm

heh. neato!(needed something longer)
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Unread postAuthor: spudthug » Thu Mar 22, 2007 4:55 pm

this gun is like tottally amazing to me...idk why but it inspired me ... if u looked in my recent posts i have plans for a new gun i am going to build...just wanted to let u know that this inspired me
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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: Wash Burn » Thu Apr 05, 2007 8:38 pm

lol lol !!!!!!! What a nice gun!!!!!!! where did you get that chamber???
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Unread postAuthor: iPaintball » Sat Apr 14, 2007 9:42 am

That cannon is pretty sweet. I think the main reason I like it is because it looks almost exactly like a paintball marker. :P Keep up the good work!
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Unread postAuthor: spud yeti » Wed May 09, 2007 8:06 am

I also have a couple of soda stream C02 but do you need a retarder or something to make it less strong?? Or can i just hook it up with some Orings and screw on? (Sounds a bit dodgy!)
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Unread postAuthor: spanerman » Wed May 09, 2007 8:45 am

Hawkeye wrote:I have pumped my small copper gun up to 300 plus with my homemade high pressure pump but I admit that I am just slightly nervous about the blowgun at that pressure.


my blowgun held 320psi for an hour with no pressure drop
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Unread postAuthor: chaos » Wed May 09, 2007 8:45 am

spud yeti wrote:I also have a couple of soda stream C02 but do you need a retarder or something to make it less strong?? Or can i just hook it up with some Orings and screw on? (Sounds a bit dodgy!)


i got one aswell man, if its got co2 in it dont f*ck with it. if its empty get some fittings and thread sealant and bolt it on, thos things are rated pretty high :wink:

welcome to spudfiles btw.

EDIT: for the above post; those blowguns have been used at excess of 400psi.
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Unread postAuthor: cb4289 » Thu May 10, 2007 7:24 pm

cool gun what type of tank is that and will hpa work on it
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