Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
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noobyspud
- Private 2
- Posts: 23
- Joined: Fri Jul 18, 2008 11:21 am
Tue Aug 26, 2008 7:57 am
hey guys,
Just got my first air cannon up and running with a 1" by 5ft barrel with a 3" by 3.2ft air chamber with a ball valve. Very happy with it and fires very well. but unfortunately for some reason the cap of the chamber began to leak air and cannot be fixed
. so i've decided to buy a new cap but cut down the chamber a bit ! but the question is how big sh0ould the chamber be ? i assume the chamber's volume should be the same sized volume as the barrels volume other wise it would be a waste of air ?
thanks guys
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ALIHISGREAT
- Staff Sergeant 3
- Posts: 1778
- Joined: Sat Aug 25, 2007 6:47 pm
- Location: UK
Tue Aug 26, 2008 8:29 am
i would just cut it down as little as possible... bigger is generally better... but you can't really go wrong with a 1/1 C/B ratio
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jimmy101
- Sergeant Major 2
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- Location: Greenwood, Indiana
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Tue Aug 26, 2008 9:43 am
1" by 5ft barrel with a 3" by 3.2ft air chamber
Your current CB ratio is about (3<sup>2</sup>)(38 )/(1<sup>2</sup>)(60) = 5.7:1
So the volume of you chamber is about 5.7 times greater than the volume of your barrel.
You can chop off a fair amount of the chamber without really affecting the performance. If you chopped off 1 foot of chamber the CB would still be 3.9.
