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Air Restriction?

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Air Restriction?

Unread postAuthor: Darkside 6ix » Sat May 24, 2008 2:43 pm

Ok people, I have a problem. Most of you know that I am building a pneumatic sniper rilfe. Well when I put the specs into GGDT, I get a warning/error message at the bottom

WRN : barrel choking air flow

If you guys want to play around with the GGDT, here is my exact specs

Barrel - 48" x 1/2"
Valve - Modded Sprinkler with blowgun and 3/4 nipple
Chamber - 32.5" x 1 1/2"

Marble weight = 8g

PSI = 80
I just wanted to post this because since some members might still consider me a "noob" even though this is my 5th pneumatic. I dont want anything blowing up in my face.
My last cannon had a 1/2" barrel and a Modded Sprinkler valve with a
1 1/2" chamber. It is very similar to the new cannon that I am building and I didnt have any problems with it. The reason I am building a new one is for some Mistakes that were "irreversible" on my old one.
All I want is the best preformance and the safest way to get it. Any help would be appreciated
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Unread postAuthor: POLAND_SPUD » Sat May 24, 2008 3:29 pm

what is the exact size of marbles you want to shoot ? last time I checked 16 mm marbles were 5 g each

I don't know what you expect from us?
if you get that message you can still read all the results...

now if you ask why you get that message... AFAIK that means that the valve has higher flow than the barrel can take....
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Unread postAuthor: MrCrowley » Sat May 24, 2008 4:04 pm


Come on, use your head.

If you're still confused after clicking the link, you want to go to the 'errors' section. :roll:
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