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Antonio
PostPosted: 03/26/2008 9:45 AM    Post subject: Reply with quote

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Where the air input is blocked off. I assume you used an oring or something to seal the whole system when the pipe is still in the backwards postition. You were talking about some leaking, but not too much> that sounds pretty nice.
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jackssmirkingrevenge
PostPosted: 03/26/2008 9:50 AM    Post subject: Reply with quote

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No seals at all, it's just a tight fit Wink
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Antonio
PostPosted: 03/26/2008 9:54 AM    Post subject: Reply with quote

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From my experience it is hard to get a tight fit when using metals. But yeah k, I guess you are ganna fix the leak though right? What are you thinking of?>
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jackssmirkingrevenge
PostPosted: 03/26/2008 10:04 AM    Post subject: Reply with quote

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ant wrote:
From my experience it is hard to get a tight fit when using metals.


Metals only, yes, but when you're casting the epoxy around the metal component, the fit is very tight. Not leakproof, of course, but leaks are negligible.
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Lockednloaded
PostPosted: 05/04/2010 19:08 PM    Post subject: Reply with quote

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I hope this idea didn't die with this thread... I have an idea!
The bolt will not blow back on it's own because there is no force acting on, well not enough. So why not add a detent so the ammo stays in the barrel longer, air pressure builds, and the rod blows back!
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POLAND_SPUD
PostPosted: 05/04/2010 20:31 PM    Post subject: Reply with quote

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this might work at higher pressures


remember BtB's pnushnikov and all that crxx about having delayed blowback ?

well guess why it was delayed?
(becasue it might work on its own... you just need to use larger bore and higher pressures than JSR)
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jackssmirkingrevenge
PostPosted: 05/04/2010 22:37 PM    Post subject: Reply with quote

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Lockednloaded wrote:
why not add a detent so the ammo stays in the barrel longer, air pressure builds, and the rod blows back!


I had tried this (rather obvious ;P) solution with flared out 0.22 pellets, effectively acting like a detent, and no success. At 100 psi there was simply too much friction. Granted, now I have 8 times that to play with, but that now means that a simple BBMG is good enough Very Happy

Quote:
because it might work on its own... you just need to use larger bore and higher pressures than JSR


What I don't like about the design is that it is fundamentally flawed, in that the valve starts to close and breech starts to open at the moment of firing, it will be quite a balancing act to get it together and working well.
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POLAND_SPUD
PostPosted: 05/05/2010 6:07 AM    Post subject: Reply with quote

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well I didn't say that your design is flawless... but that the blowback can work

anyway I think you just have to modify your original design... if you have a look at it it isn't that bad...

...add a DCV or an aircylinder here and there and it might work Very Happy
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jackssmirkingrevenge
PostPosted: 05/05/2010 22:39 PM    Post subject: Reply with quote

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POLAND_SPUD wrote:
...add a DCV or an aircylinder here and there and it might work Very Happy


You know that excuse works for us, but someday, in the future, when your wife asks why you cannot have children, some suggestions will no longer be valid Very Happy
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POLAND_SPUD
PostPosted: 05/06/2010 5:40 AM    Post subject: Reply with quote

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if I understand you correctly that's your way of saying that 'yeah you are probably right, but I am having a terrible hangover'
Very Happy
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jackssmirkingrevenge
PostPosted: 07/16/2010 3:21 AM    Post subject: Reply with quote

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You know, if this turns out to be practical, with some modifications you might have a point about this design working at higher pressures...


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POLAND_SPUD
PostPosted: 07/16/2010 5:40 AM    Post subject: Reply with quote

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I see that you realized that it would be good to have a mechanism that closes off air supply when the gun fires Very Happy
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jackssmirkingrevenge
PostPosted: 07/17/2010 5:58 AM    Post subject: Reply with quote

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It's more the idea that one of the inconveniences of the valveless/popoff concept is a pressurised magazine. Not that I've given up on that though, ordered a tube bending set Wink

btw, pending the day with a couple of your countrywomen tomorrow Wink
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POLAND_SPUD
PostPosted: 07/17/2010 8:11 AM    Post subject: Reply with quote

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lol what a coincidence I almost bought one yesterday...
Quote:
pressurised magazine

I'd use my fullauto circuit to achieve the same effect.... remember this video ??


Link


Quote:
your countrywomen tomorrow
lol dude it's not my fault that other European girls are not as hot...
anyway.... better get ready for a terrible hangover...
there is no chance you can keep up with them
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Ragnarok
PostPosted: 07/17/2010 8:54 AM    Post subject: Reply with quote

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POLAND_SPUD wrote:
dude it's not my fault that other European girls are not as hot...

Are you sure? I've heard some rumours...
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