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.
Full repeater.
Close up of nipple in the epoxy. It is removable as you will see in another photo.
Pop off valve.
Attached to fire extinguisher.
Hole where the pipe nipple goes.
I hope you enjoyed looking at the pictures.
Posted: Thu Jul 07, 2011 9:33 pm
by farmerboy32
the results of your tinkering with this design should generate some very nice results! keep up the work, and keep us posted!
Posted: Thu Jul 07, 2011 10:15 pm
by Gun Freak
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:
Posted: Thu Jul 07, 2011 10:27 pm
by jackssmirkingrevenge
So it's basically this?
[youtube][/youtube]
Needs a barrel, magazine...
Posted: Fri Jul 08, 2011 8:31 am
by warhead052
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.
Posted: Sat Jul 09, 2011 2:23 pm
by Brian the brain
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....
@ warhead:
These type of devices tend to...generally not work very well..
Posted: Sat Jul 09, 2011 2:27 pm
by warhead052
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.
The snapvalve was pretty much the same thing though
Posted: Sat Jul 09, 2011 2:32 pm
by warhead052
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.
Posted: Sat Jul 09, 2011 2:41 pm
by Brian the brain
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.
There is no fail like a JSR fail..
Posted: Sat Jul 09, 2011 3:08 pm
by warhead052
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?
Posted: Sat Jul 09, 2011 3:12 pm
by jackssmirkingrevenge
Brian the brain wrote:There is no fail like a JSR fail..
I'll take that as a compliment
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.
Posted: Sat Jul 09, 2011 3:28 pm
by warhead052
I removed key ring and tried the drill bit in the hole and twisted, but its not working. Any other tips?
Posted: Sat Jul 09, 2011 3:33 pm
by jackssmirkingrevenge
Of course, my bad, that's the valve part. Can you grab the lip with pliers, the one just below the keyring.
Posted: Sat Jul 09, 2011 3:38 pm
by warhead052
Just barely. It slips ever time I try and turn it though.
