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Vortex block material

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Unread postAuthor: pneumaticcannons » Wed Oct 19, 2011 9:40 pm

just take a bb or two with you to the shop so you know it will fit.


ya thats exactly what i do. I used an aluminum tube i got from hobby town USA when I visited the states last winter. It worked OK but from then I tried a tight bore and the difference is pretty big as Gun freak said.
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Unread postAuthor: stuffbuilder » Sat Oct 22, 2011 12:44 am

I'm not really concerned with accuracy, since the thing is going to be more of a flamethrower than a gun. Also what kind of pressure is the bb chamber usually subjected to?
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Unread postAuthor: Gun Freak » Sat Oct 22, 2011 10:45 am

Not much since the air goes right out the barrel. Depends on your chamber size and valve, but less than 50% most of the time.
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Unread postAuthor: pneumaticcannons » Sat Oct 22, 2011 11:20 am

If you're using a blowgun and a moderate sized chamber, then the pressure is very low. This is why people use long barrels and detents in bbmg's
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Unread postAuthor: stuffbuilder » Mon Oct 24, 2011 5:40 pm

I'm using a pistol grip blowgun as a trigger; the chamber is a 2 inch tee with a 2 inch coupling attached to one port. I'm thinking about using a 509mm airsoft barrel I found online for a good price
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Unread postAuthor: Gun Freak » Mon Oct 24, 2011 6:08 pm

Hm... I would reccomend a smaller chamber, that one sounds like its a bit on the large side.
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Unread postAuthor: stuffbuilder » Tue Oct 25, 2011 12:19 am

The only reason I'm using such a large chamber is because its part of an old piston valve that didn't work but I didn't want to waste. I am considering making some sort of conical insert that makes it easier for the bbs to fall down to the vortex block, so I'm thinking that will take up at least some of the space. Is a big chamber a bad thing other than the fact that it takes a lot of bbs to fill?
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Unread postAuthor: Crna Legija » Tue Oct 25, 2011 1:24 am

bigger chamber + same input pressure=lower chamber pressure.
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Unread postAuthor: stuffbuilder » Wed Oct 26, 2011 8:18 pm

Does chamber pressure matter? I would imagine that most of the power would come from the bbs spinning in the vortex block on the stream of air and the air escaping out the barrel instead of from chamber pressure. I mean the air doesn't have anywhere else to go but the barrel right?
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Unread postAuthor: Gun Freak » Wed Oct 26, 2011 8:24 pm

The vortex helps with feeding, the air pressure does the pushing. More pressure = MOAR power.
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Unread postAuthor: stuffbuilder » Mon Nov 14, 2011 4:40 pm

What size should the outlet hole in the vortex block be? Should it be just big enough for the bbs to fit through, or should it be larger so its easier for them to line up and then taper down to the size of the barrel?
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Unread postAuthor: Gun Freak » Mon Nov 14, 2011 4:57 pm

Drill the hole equal to the OD of the barrel.
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