Bike Pump Gun

Building or modifying BB, Airsoft, and Pellet type of guns. Show off your custom designs, find tips and other discussion. Target practice only!
Kenny_McCormic
Specialist 2
Specialist 2
Posts: 283
Joined: Wed Jan 03, 2007 8:59 pm

Sat Feb 24, 2007 10:39 am

brakline could probably hold it as its make for hydraulics which go to very high pressures i dont know how high a brake system goes. yellow brass is rated to 1500 psi iirc i have no idea on copper depend on what kind of copper at least 300psi
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noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

Sat Feb 24, 2007 10:12 pm

I doubt it. I wouldn't trust copper to pressure that high, and definately not brakeline, considering it's wall thickness is .016."
Oops, second page. Hotwired probably knows more than I do about copper, I find it too expensive to be of any use to me.
SniperMan
Private 2
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Posts: 22
Joined: Wed Jul 12, 2006 7:39 pm

Tue Mar 13, 2007 6:17 pm

My bb runs @ 80psi with 5mm bb's. The Barrel is about 60cm long and with about 800cc tank i get 100m/s. Mine is a little different than a normal single shot as it has multiple valves etc and can only be used on compressed air.

That sort of volume is what i would call 'pumpable' however. If you want to run lower pressure for the same velocity you need a longer barrel and more air to give it time to accellerate the bb.
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