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Pneumatic repeater prototype.

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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Pneumatic repeater prototype.

Unread postAuthor: warhead052 » Thu Jul 07, 2011 4:57 pm

Title says all. I used a regular pop off valve set at 125psi, epoxy, 1/8" nipple, and 8" of 3/4" pvc pipe with an end cap. This was also my first time at casting epoxy on the inside of pvc, so its not that bad for me.

Pictures.

Image

Full repeater.

Image

Close up of nipple in the epoxy. It is removable as you will see in another photo.

Image

Pop off valve.

Image

Attached to fire extinguisher.

Image

Hole where the pipe nipple goes.

I hope you enjoyed looking at the pictures.
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Unread postAuthor: farmerboy32 » Thu Jul 07, 2011 9:33 pm

the results of your tinkering with this design should generate some very nice results! keep up the work, and keep us posted! :D
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Unread postAuthor: Gun Freak » Thu Jul 07, 2011 10:15 pm

So it's a piece of pipe with a pop off valve and a pipe nipple unnecessarily epoxied in it. Not a repeater yet :tongue3:
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Unread postAuthor: jackssmirkingrevenge » Thu Jul 07, 2011 10:27 pm

So it's basically this?

[youtube]http://www.youtube.com/watch?v=13BHdjUD69Y&feature=related[/youtube]

Needs a barrel, magazine...
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Unread postAuthor: warhead052 » Fri Jul 08, 2011 8:31 am

Yeah jacks, thats pretty much what it is just without the horrible noise. I have an idea for a blow back barrel that really isn't blow back so much as pull back. Just put a sliding cover with orings over the barrel, and have it travel over or under the magazine, and epoxy it to the piston of the pop off. It makes it cycle opening and closing the breech.
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Unread postAuthor: Brian the brain » Sat Jul 09, 2011 2:23 pm

Please direct him to the two years worth of research you have done on this basic idea JSR...(well you did most of the work)

It might prevent warhead from having to go through a nervous breakdown.... :D


@ warhead:

These type of devices tend to...generally not work very well..
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: warhead052 » Sat Jul 09, 2011 2:27 pm

Yeah, I kinda figured. I have an idea on what I want to do, the hardest part will probably be putting the magazine together, but once I solve that problem it will be easy. Pretty much its going to be a 1/4" tube, with a 3/8" tube over it. And the 3/8" tube is epoxied to the hole where the ring goes on the pop off. Then a bit of grease and it should slide back and forth. No need to make it overly complicated.
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 09, 2011 2:29 pm

Here you go, not counting the failed prototypes

custom pop-off v1.0

custom pop-off v2.0

custom pop-off v3.0

(well you did most of the work)


The snapvalve was pretty much the same thing though ;)
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Unread postAuthor: warhead052 » Sat Jul 09, 2011 2:32 pm

Jsr, when ever I see you post a link, I know I am going to end up with at least 50 tabs open.... I have seen those by the way.
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Unread postAuthor: Brian the brain » Sat Jul 09, 2011 2:41 pm

The snapvalve was pretty much the same thing though


I made two.First one as a stand alone unit, wich failed but was a VERY powerfull single shot/repeater valve.Just needed to close the blowgun in between shots.
But as a full auto valve it was a fail.

The second one I made specifically to be used in combination with a ( modified) QEV.
The result was shown in the " Pnushnikov" prototype.
(I got the bug back but my health is keeping me from picking up the hacksaw...jus waiting for a good day I guess)

So...JSR, with 3 working and numerous fails....you did most of the work.
:D

There is no fail like a JSR fail..
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: warhead052 » Sat Jul 09, 2011 3:08 pm

Well, I have a new idea. I saw saladtosser's "m16ish looking piston valve" rifle, and I think I will try something like that. I just have to figure out how to get the top of my pop-off off so I can put a much weaker spring inside instead of my 125 psi spring... Got any tips on how to remove the top?
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 09, 2011 3:12 pm

Brian the brain wrote:There is no fail like a JSR fail..


I'll take that as a compliment :D

Got any tips on how to remove the top?


Remove the keyring, stick in a drill bit that fits in the hole and turn anti-clockwise.
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Unread postAuthor: warhead052 » Sat Jul 09, 2011 3:28 pm

I removed key ring and tried the drill bit in the hole and twisted, but its not working. Any other tips?
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 09, 2011 3:33 pm

Of course, my bad, that's the valve part. Can you grab the lip with pliers, the one just below the keyring.
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Unread postAuthor: warhead052 » Sat Jul 09, 2011 3:38 pm

Just barely. It slips ever time I try and turn it though.
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