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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: blind909 » Sat Jan 03, 2009 11:29 pm

Ok, here she is, she has a 7/8 inch steel chamber, custom fittings(plugs, cant find fittings for the pipe). Nerf magstrike valve(shoots bbs GREAT). I have built a bb gun using this same valve before, but lasted a couple days, becausi i didnt like that one much. but it has been rebuilt. A video will be up sometime(when i hook up the gravity fed magazine). Any questions, feel free to ask.

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Last edited by blind909 on Sun Jan 04, 2009 10:26 pm, edited 5 times in total.
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Unread postAuthor: roboman » Sat Jan 03, 2009 11:47 pm

Ummm... internals?

I'm assuming it's some sort of a blow-forward breech...correct me if I'm wrong.
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Unread postAuthor: blind909 » Sun Jan 04, 2009 12:03 am

roboman wrote:Ummm... internals?

I'm assuming it's some sort of a blow-forward breech...correct me if I'm wrong.


When u open the BV, air goes into the chamber, then into th eautomatic valve. the valve moves forward, alows air into the barrel and comes back again, then repeats the process. What do you mean internals? Its not like i can break apart the valve and show it off, it is all one piece, and no, it is not a blow forward breech, i will just have a gravity fed mag on top. the barrel moves with the valve. You will understand more when i get a video up.
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Unread postAuthor: roboman » Sun Jan 04, 2009 12:09 am

Microsoft paint, Appleworks...

Essentially, you made a blow forward breech, like this: http://www.spudfiles.com/forums/6mm-semi-added-trigger-and-mag-t10075.html

JSR found that he couldn't achieve full auto...only semi. :?
How did you make it work?
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Unread postAuthor: blind909 » Sun Jan 04, 2009 12:14 am

I took the valve out of a nerf gun(the Magstrike, a full auto nerf gun). I did not make it.
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Unread postAuthor: dudeman508 » Sun Jan 04, 2009 12:15 am

can we please have a diagram
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Unread postAuthor: blind909 » Sun Jan 04, 2009 12:19 am

DUDE, I DONT KNOW HOW THE VALVE WORKS, I DID NOT MAKE IT, ALL I KNOW IS THAT IT IS A FULL AUTO VALVE. HERE IS A LINK TO THE GUN I AM TALKING ABOUT-[youtube]http://www.youtube.com/watch?v=3G8il4lNusY[/youtube]
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Unread postAuthor: roboman » Sun Jan 04, 2009 12:37 am

blind909 wrote:
roboman wrote:Ummm... internals?

I'm assuming it's some sort of a blow-forward breech...correct me if I'm wrong.
Its not like i can break apart the valve and show it off, it is all one piece, and no, it is not a blow forward breech, i will just have a gravity fed mag on top. the barrel moves with the valve. You will understand more when i get a video up.


Actually, yes it is. From what you described, it is a blow-forward breech. If it is actuated pneumatically, and oscillates back and forth, then it's very similar to what JSR built (except that he could only achieve semi-auto). Hence the name blow-forward. Makes sense! :)

BTW: that video explains next to nothing about how the magstrike works. It just shows Forsaken_Angel_24 (a prominent user on Nerfhaven) firing a modded magstrike.
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Unread postAuthor: blind909 » Sun Jan 04, 2009 12:47 am

Yeah, i know who forsaken angel was, i used to be a member there for years, but my account was suspended permenantly. And i know it doesnt explain anything, i was just pointing out what gun/valve i used.
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Unread postAuthor: roboman » Sun Jan 04, 2009 12:50 am

Just wondering... why were you suspended? Did VACC get you? :D
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Unread postAuthor: blind909 » Sun Jan 04, 2009 12:59 am

Read my last topic there-http://nerfhaven.com/forums/index.php?showtopic=11767. BTW, lets stay on topic now
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 04, 2009 5:49 am

Love the myspace style photo :roll: :D but it would be nice to see a video backing up the full auto! claims ;)
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Unread postAuthor: blind909 » Sun Jan 04, 2009 1:00 pm

OK JSR, a video will be up later today, but i wont be shooting anything, because i havent made the mag yet.
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Unread postAuthor: blind909 » Sun Jan 04, 2009 10:43 pm

Sorry no vid yet, i had to reglue the valve to the rest of a gun.
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Unread postAuthor: Braddubya » Tue Jan 06, 2009 12:47 am

I dont get how a "full auto valve" (aka an open valve im guessing) will allow you to have automatic loading of a projectile...
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