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A pistol - Questions about blowgun valve and piston valve

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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A pistol - Questions about blowgun valve and piston valve

Unread postAuthor: Marco321 » Tue May 22, 2007 5:04 am

Hey
Iv done some searching and i didn't get a proper answer to my question.

I was wondering if a blowgun has enough airflow and stuff to power a projectile from a 6mm tube with a decent velocity. Im looking to make a pistol which shoots out 6mm projectiles. Im gonna wrap a nail in some duct tape.

I also had a look at making a piston valve coaxial pistol. But for that i also need a few pointers and searching hasn't helped much. I was wondering what is the best way to make a piston to be used with a 6mm barrel and a 40mm pvc pressure pipe as a chamber.
Thanks
Marco
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Unread postAuthor: integral » Tue May 22, 2007 5:15 am

If you havent seen it already: http://www.spudfiles.com/forums/piston-valves-explained-visually-t8157.html

The blowgun might have enough flow for the pelet to get propelled, but personally I would think that the results will be less than desirable.
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Oderint dum metuant
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Unread postAuthor: shud_b_rite » Tue May 22, 2007 5:16 am

Blowguns haven't got good flow. You could build a small pistol like this but it probably wont shoot further or faster than you can throw it.
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Airbeds... so many different uses
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Unread postAuthor: Marco321 » Tue May 22, 2007 5:19 am

Yeah i saw that piston thing and i understand how they work, i was just wondering what the best way to make the seal with the barrel and piston is. Oh ok ill go for the piston
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Unread postAuthor: jackssmirkingrevenge » Tue May 22, 2007 5:39 am

have a look here and scroll down - with a long enough barrel, a blowgun will give you decent performance, but for a pistol sized package you need a better valve - have a look at my mini-coaxial designs
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Unread postAuthor: Marco321 » Tue May 22, 2007 5:45 am

Thanks Jackssmirkingrevenge, ill make something like that.
And thanks for the blowgun advice
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