Coaxial Questin

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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magnum9987
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Mon Jul 28, 2008 8:49 pm

I have settled on building a coaxial, for its compactness for combat use (Yay). I have settled on a 1.5 in barrel and 54in long. I only want the barrel to extend just outside the chamber, at most 4 in. I need to know will the gun still operate if 50in of the barrel is inside a combustion chamber 54 in long, for a total of 58 in in length?
http://www.spudfiles.com/forums/viewtop ... Revolution in the absolute is not initiated by swords, guns, and bullets, but by words-
The New RobesPierre
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TwitchTheAussie
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Mon Jul 28, 2008 9:00 pm

It will but it will perform poorly. According to whatever studies were done on coax combustions, they seem to lack more power than a conventional combustion.
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magnum9987
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Mon Jul 28, 2008 9:02 pm

Damn! I will have to raise the diameter of the chamber
http://www.spudfiles.com/forums/viewtop ... Revolution in the absolute is not initiated by swords, guns, and bullets, but by words-
The New RobesPierre
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frankrede
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Mon Jul 28, 2008 9:05 pm

Or just build a pneumatic.....
in which coaxials are more common and effective.
Current project: Afghanistan deployment
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magnum9987
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Mon Jul 28, 2008 9:14 pm

not an option, i have a pathetic air compressor, and pneumatics arnt as good for a battlefield, which is my hope for the spuddy im building.
http://www.spudfiles.com/forums/viewtop ... Revolution in the absolute is not initiated by swords, guns, and bullets, but by words-
The New RobesPierre
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frankrede
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Mon Jul 28, 2008 9:19 pm

magnum9987 wrote:not an option, i have a pathetic air compressor, and pneumatics arnt as good for a battlefield, which is my hope for the spuddy im building.
O RLY?
http://www.spudfiles.com/forums/erg-sb- ... 15171.html
Current project: Afghanistan deployment
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MrCrowley
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Mon Jul 28, 2008 10:47 pm

magnum9987 wrote:pneumatics arnt as good for a battlefield
So that explains why most paintball guns are pneumatic in operation :roll:


Pneumatics are far better then combustions on the 'battlefield' until someone builds a working full auto or semi-auto combustion.
TurboSuper
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Tue Jul 29, 2008 5:45 am

How crappy can your compressor be? You can charge a pneumatic with a bicycle pump.
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