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Semi Automatic Blowback Paintball Launcher

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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Unread postAuthor: jackssmirkingrevenge » Fri Jul 02, 2010 1:55 am

If the detent works correctly and you have a tight magazine, you won't need a paddle because the air pressure will push the paintballs in the mag up. You'll also be wanting a spring at the top of the mag, to stop the paintballs crushing eachother.
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Unread postAuthor: Lockednloaded » Fri Jul 02, 2010 11:17 am

here's a blow forward barrel design that i think would be easier to build, but i hope the barrel will not be too heavy for the loading action to work effectively. It will probably have a sliding barrel support to reduce the stress on the blow forward action

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Unread postAuthor: Gun Freak » Fri Jul 02, 2010 1:45 pm

Mark.f used that concept on his full auto marble launcher, so yeah it will work.
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Unread postAuthor: jhalek90 » Fri Jul 02, 2010 5:52 pm

Lockednloaded wrote:Image


I just want to warn you.. there should be no need for the paddle... just put a second detent behind the mag where you paddle is now...

And, if you ever use solid... hard projectiles... prepare to replace that front detent every few 100 shots.
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jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?

POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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Unread postAuthor: Lockednloaded » Fri Jul 02, 2010 9:37 pm

I'll build two loading prototypes, one of each.wish me luck
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Unread postAuthor: jhalek90 » Sat Jul 03, 2010 6:32 am

luck wished 8)
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jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?

POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
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Unread postAuthor: Gun Freak » Sat Jul 03, 2010 12:49 pm

Use an o-ring detent and it won't wear out for a long time.
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Unread postAuthor: Lockednloaded » Sat Feb 12, 2011 12:02 am

sorry to kick this up, but I'm thinking of using the blow forward barrel for this long put off project. I can now use pressures up to 700psi, so I think it may be a viable options, but do you think the barrel will be too massive even with sliding supports?
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