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My Gun on GGDT

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My Gun on GGDT

Unread postAuthor: MrCrowley » Fri Jul 28, 2006 8:35 pm

this is a screen shot of the pneumatic GB gun im building on GGDT,it says the barrel is too long at 56". should i leave it at 56"?or make it shorter any tips?

http://img291.imageshack.us/img291/2213/ggdtnn9.png

sorry i couldnt hotlink the picture it was too small to see when i did for some reason so this link works best
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Unread postAuthor: saladtossser » Fri Jul 28, 2006 8:46 pm

set the inner diameter to 0, and leave it 0 for everything except coaxial guns

edit, it seams like the valve is shut before all the air got out, i tried 10ms opening time and got well over 500 fps

try and get real valve data

edit...

Image
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Unread postAuthor: MrCrowley » Fri Jul 28, 2006 9:18 pm

ok thanks it works now,hjow far do you think it the GB will go?
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Unread postAuthor: SpudStuff » Fri Jul 28, 2006 9:38 pm

that depends on many factors you need to specify thoes before you can know for sure. expect ~600 yards...
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Unread postAuthor: mark.f » Fri Jul 28, 2006 9:54 pm

I wouldn't think 600 yards, SpudStuff.
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Unread postAuthor: saladtossser » Fri Jul 28, 2006 10:14 pm

793 feet or about 264 yards. calculated with ggdt. so expect about 200 yards
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Unread postAuthor: MrCrowley » Sat Jul 29, 2006 2:51 am

is there anything i could do to increase the range?
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Unread postAuthor: boilingleadbath » Sat Jul 29, 2006 10:40 am

A hop-up device would probably help.
(And please don't ask "what is that"... we've discussed it many times before, just use the search function...)
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Unread postAuthor: MrCrowley » Sat Jul 29, 2006 5:10 pm

i wasnt gonna ask :D ,i searched the forums and i cant find a decent explanation of how to build/install one or what ever, there are a few threads that just say.. that o-ring my help as a hop-up, or if that pipe bends correcly it will be a hop up. is there a proper way to do make one?
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Unread postAuthor: CS » Sat Jul 29, 2006 5:21 pm

"is there a proper way to do make one?"

Tap <a href="http://www.piening-propeller.com/de/grafiken/pic1095750792.jpg">THIS</a> ~3/4" into your barrel. I actually use a 12' version, but a smaller one will work.

JK, besides curvture of the barrel, and adding a obstruction, I know none. Also adding a strip of "friction" tape has been done by some.
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Unread postAuthor: MrCrowley » Sat Jul 29, 2006 5:25 pm

ok then whats a good thing to "obstruct" the barrel with?

btw in your sig shouldnt it say "new and improved" not inproved or is inproved some fancy term or some crap?
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Unread postAuthor: boilingleadbath » Sat Jul 29, 2006 8:16 pm

crowley, I think that's an M.
Can't be compleatly sure, though.

Maybe I'll do a wright-up of my hop-up device... but to tell you the truth, I havn't used it enough to say (for sure) that it'll last very long, as I've only put about 15-20 rounds through the barrel.

(in short, I have a patch of rubber that I can lower down into the barrel via a screw.)
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Unread postAuthor: saladtossser » Sat Jul 29, 2006 8:17 pm

pimpmann22 wrote:<a href="http://www.piening-propeller.com/de/grafiken/pic1095750792.jpg">THIS</a>


is that a joke? or am i missing something?

edit, my bad
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Last edited by saladtossser on Sat Jul 29, 2006 9:55 pm, edited 1 time in total.
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Unread postAuthor: MrCrowley » Sat Jul 29, 2006 9:42 pm

both tosser :D jkz

BLB do you mean something like ..you lower a piece of rubber via a screw in the barrel just enough so it skims the projectile(e.g golf ball) and makes it spin backwards when fired? keep me updated on your tests
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