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Old 07-31-2006, 07:37 PM   #11 (permalink)
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Quote:
Originally Posted by Schmitti
MCB was the last one... this is MCB II
So what was the first one then?
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Old 07-31-2006, 08:04 PM   #12 (permalink)
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He's refering to the old grey/salmon coloured forum that ran on the old code Carter wrote as the old MCB.
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Old 07-31-2006, 10:19 PM   #13 (permalink)
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I think someone could probably make a cocker out of lexan or some other poloycarbonate, but as Schmitti pointed out, I too think the outside dimentions would have to be larger. I have a couple of pieces of polycarbonate 1" diameter rodstock if someone wanted to do a pressure test. They could be drilled out and threaded, then pumped up to pressure. I wouldn't want to hold it though, plastic shrapnel doesn't sound fun.
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Old 07-31-2006, 10:39 PM   #14 (permalink)
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I remember shipping a big hunk of 1 1/8" BR plexi to a guy in AK, from the old MCB, to try and build something along those lines. I don't remember if he every got any further with it then opening the package. I still have a few hunks around if anyone want a whack at it.
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Old 07-31-2006, 11:22 PM   #15 (permalink)
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Clear Cocker?

What about those old clear Air America expansion chambers?
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Old 08-01-2006, 02:06 AM   #16 (permalink)
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Man, if only there was such a thing as a transparent metal....
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Old 08-01-2006, 09:50 AM   #17 (permalink)
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Quote:
Originally Posted by Frontier_Bill
Man, if only there was such a thing as a transparent metal....
Closer than you think.

http://www.af.mil/news/story.asp?id=123012131

http://beverlytang.com/archives/mate..._aluminum.html

http://www.technovelgy.com/ct/Scienc...sp?NewsNum=202

http://www.chemistry.org/portal/a/c/...inum_arch.html

http://en.wikipedia.org/wiki/Transparent_aluminum
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Old 08-01-2006, 10:17 AM   #18 (permalink)
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They make transparent concrete... or was that translucent?

1" poly or lex would be the same width as the current bodies..I'm thinking the wall thickness you would need would make them pretty damn ugly and unmarketable.

The other thing too would be the threads holding things in... think about it, the threads holding the front block screw in have to hold 400+ psi...the screw is about 3/8" in diameter....actually not as bad as I thought...number comes out to 44 pounds pushing on the screw from internally (but that's only for a regulated 400 psi input)..800 psi would give 88 pounds pushing on the screw....

The valve nut would be holding in more force...that's what about 5/8 (conservative).. 122 pounds for 400 psi... 244 pounds for 800 psi.

Anyways, I think the shallow threads that work fine in metal would fatigue quicker in plastic, if not outright fail, and yould have a gun that may hold together laterally but might blow it's guts length wise.
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Old 08-01-2006, 11:44 AM   #19 (permalink)
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Well, now they just need to start making it cheaply, commercially available, and thicker.. such as transparent alumina bar stock.

Thats some super-nifty reading there!
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Old 08-01-2006, 11:59 AM   #20 (permalink)
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Quote:
Originally Posted by Schmitti
They make transparent concrete... or was that translucent?

1" poly or lex would be the same width as the current bodies..I'm thinking the wall thickness you would need would make them pretty damn ugly and unmarketable.

The other thing too would be the threads holding things in... think about it, the threads holding the front block screw in have to hold 400+ psi...the screw is about 3/8" in diameter....actually not as bad as I thought...number comes out to 44 pounds pushing on the screw from internally (but that's only for a regulated 400 psi input)..800 psi would give 88 pounds pushing on the screw....

The valve nut would be holding in more force...that's what about 5/8 (conservative).. 122 pounds for 400 psi... 244 pounds for 800 psi.

Anyways, I think the shallow threads that work fine in metal would fatigue quicker in plastic, if not outright fail, and yould have a gun that may hold together laterally but might blow it's guts length wise.
I think there could be ways around threading the plastic, but it would be a pain. Someone already mentioned the fact the plastic would scratch up and turn cloudy quickly.
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