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pump up marble shoota

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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pump up marble shoota

Unread postAuthor: dopeassmonkey » Sat Dec 22, 2007 10:13 am

i was wanting to make a small gun that has a bike pump on board for shooten marbles has any1 else on here made something like that that i could get some ideas from? had a bit of a look around but didnt find much
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Unread postAuthor: mopherman » Sat Dec 22, 2007 11:34 am

Well theres this or theres the LOKI with on board compressor .The thing about on board pumps is that they are often too cumbersome to use effectively. I would advise against it.
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Unread postAuthor: dopeassmonkey » Sat Dec 22, 2007 12:06 pm

was kinda more interested in somethen not terribly powerful (not having to pump it too much) maybe even just enough to put a hole in cardboard from a distance more for target practice without having to have a compressor or separate pump
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Unread postAuthor: VH_man » Sat Dec 22, 2007 12:10 pm

try something with a small chamber, like 5 inches of 1.5 inch pipe.

i know with 6 inches of 2 inch pipe i get up to 120 PSI in 12 pumps from my bike pump. literally takes 15 seconds to fill.

if you really wanna go overboard, get a CO2 setup, a slide valve, a QEV, and make some sort of bolt-action reolading system and make the air-flow semi-auto and just load a new marble in for each shot.........

hell, it takes 20 PSI to get a marble through cardboard....... lol.
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Unread postAuthor: ALIHISGREAT » Sat Dec 22, 2007 12:20 pm

if you want something accurate with not too much power i would go for an airsoft bb shooting gun which you should get good range and accuracy with.
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Unread postAuthor: jean » Sat Dec 22, 2007 5:17 pm

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Unread postAuthor: carter » Sat Dec 22, 2007 5:33 pm

i have thought about doing this but the main problem was th pressure i would get from it. i have used a hand held pump to pump up a 3'' by 9'''camber and took forever and got to roughly 40psi. but using a smaller chamber would help.
firstly you could use a basic rifle design. mount the pump under the barrel and fit the chamber in the stock. or using a under over design have the pump mounted next to the chamber. its up to you.
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