pneumatic chamber / barrel ratio
i just thought about this but has anyone ever checked if the chamber/barrel ratio ever mattered? i looked at some old mini's and i thought about that because if the volume of the barrel is bigger than the chamber then the projectile wont have a high enough velocity/mass ratio to do significant damage. i'm thinking of building a pengun or a coaxal just for some portable fun
when life gives you lemons... make root beer and leave the world wondering how you did that 
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Technician1002
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Yes it matters. Google Gas Gun Design Tool (GGDT) and play with hypothetical cannons to fine tune your design before building it.
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jrrdw
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Goooooooood plan!Technician1002 wrote:Yes it matters. Google Gas Gun Design Tool (GGDT) and play with hypothetical cannons to fine tune your design before building it.
How do you get into the ggdt, and i am gonna build a coaxial to you all stop with your complaint that i havent built anythin.
when life gives you lemons... make root beer and leave the world wondering how you did that
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jrrdw
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Here, maybe this will help you finaly build something: http://www.spudfiles.com/spud-cannon-re ... 13096.html