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Does a longer barrel add distance ?

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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Does a longer barrel add distance ?

Unread postAuthor: worldburrito45 » Wed Feb 08, 2012 7:29 pm

I built a cannon it's got 4 and a half feet of 3 inch reduced to 2 inch then reduced to 1 inch then a 1 inch ball valve then 1 inch increased to two inch increased to 3 to about 6 inches of 3 inch barrel if I were to make it a 2 and a half foot barrel would it make it shoot further? Preciate it. Jack
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Unread postAuthor: mobile chernobyl » Wed Feb 08, 2012 8:39 pm

Yes,

Barrel length increases the distance... That the ammo has to travel before it leaves the barrel.

My reccomendation is to use the spudfiles search for the term GGDT to familiarize yourself with the gas gun design tool. This is a great program for beginners to get used to optimization of their pneumatic spudgun!
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Unread postAuthor: Hawkeye » Wed Feb 08, 2012 9:43 pm

Still a balance between the increased time the ammo is pushed by the air versus overcoming the frictio of the barrel.
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Unread postAuthor: worldburrito45 » Wed Feb 08, 2012 10:41 pm

where can i find the GGDT i tried searching it
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Unread postAuthor: Proxywars » Wed Feb 08, 2012 10:45 pm

It is the first hing to popup on google. Google found it in (0.09 seconds) as did I. Image
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Unread postAuthor: worldburrito45 » Wed Feb 08, 2012 11:50 pm

ya i downloaded it but it says error '339':

component 'MSCHRT20.0CX' or one of its dependencies not correctly registered: a file is missing or invalid

no idea what this means
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Unread postAuthor: worldburrito45 » Wed Feb 08, 2012 11:51 pm

also what are spud bux sorry im a noob
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Unread postAuthor: mobile chernobyl » Thu Feb 09, 2012 12:00 am

Mac? Windows? if Windows... windows vista/7? if so you'll need to right click on the .exe file and click run in compatibility mode.
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Unread postAuthor: worldburrito45 » Thu Feb 09, 2012 12:02 am

there is no .exe file
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Unread postAuthor: mobile chernobyl » Thu Feb 09, 2012 12:16 am

Image

But there is an application file named ggdt4.6 or something of the like - do what I said with that.
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Unread postAuthor: worldburrito45 » Thu Feb 09, 2012 12:29 am

Ok thanks I really appreciate it. I'm not the best with computer things
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Unread postAuthor: Crna Legija » Thu Feb 09, 2012 4:41 am

worldburrito45 wrote:Ok thanks I really appreciate it. I'm not the best with computer things


before you ask their are instructions on how to use it on the GGDT web page.
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Unread postAuthor: mattyzip77 » Sat Feb 11, 2012 2:29 pm

You have to run ggdt as a administrator or it will not work
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