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Is blowgun fast enough to this?

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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Is blowgun fast enough to this?

Unread postAuthor: Gunner » Fri Dec 07, 2007 6:39 pm

I am doing a copper valve piston air cannon and as pilot works a normal blowgun "DG-10" and tee`s ID is 32mm and barrels ID 20mm and OD 22mm and pilot volume is something 10cm3-15cm3+tube`s volume that goes to the blowgun (something 5cm3) and my question is that,does the blowgun exhaust fast enough to launch valve?
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Unread postAuthor: BigGrib » Fri Dec 07, 2007 7:13 pm

the blowgun is fast enough but i would use the largest possible ID for the pilot tube
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Yea, that's definitely going to get you at least a tazer.

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Unread postAuthor: Ragnarok » Fri Dec 07, 2007 7:29 pm

BigGrib wrote:the blowgun is fast enough but i would use the largest possible ID for the pilot tube

No, low ID, a higher ID will create a higher pilot volume. The flow of the lower ID tubing will still beat the blowgun unless it's stupidly narrow, and the low volume will exhaust quicker.

I have to ask... are you a UK resident? It's just when you say 22mm copper, that immediately rings bells.

Anyway, that should work as long as your piston is a good fit. If it's too loose, you might loose some power.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: Gunner » Sat Dec 08, 2007 4:18 am

Ragnarok:I come from Finland antd that`s why I speak bad english :D .
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Unread postAuthor: Novacastrian » Sat Dec 08, 2007 6:09 am

Why not get rid of the hose altogether and use an elbow like this.
Image
Makes a nice ergonomic position for the trigger too.
Edit: Just realised my blowgun is a dg-10 also :D
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Unread postAuthor: Ragnarok » Sat Dec 08, 2007 11:10 am

Gunner wrote:Ragnarok:I come from Finland antd that`s why I speak bad english :D .

It's actually pretty good. I've seen much worse from people who speak it as a native language.
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