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Nooby Pneumatic Gun...

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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Nooby Pneumatic Gun...

Unread postAuthor: StClingin » Sat Sep 16, 2006 5:29 pm

Hey there...

I have had my own ideas... and I finally made one.

I got a basic pneumatic blow gun, just a normal, stock, workshop blow gun... shoved a sealed PVC pipe on the end, and smashed a cork onto the end of it...

Started the compressor, and gave it 110 psi, the cork flew about 20 metres...

Do you have any tips? The only thing I can think of is having a longer barrel, or a larger blow gun, as the hole where the air escapes is only about 2 1/2mm (1/4 inch)...

Oh... and normal spuds don't go well, as they are too slippery and not enough air can build up behind them...

So yeah, should I go on with the idea of a laregr blow gun? Or try make a real one (sprikler valves and all)...

I have thought of using a normal garden tap also, as the valve seeing their pretty think, but I have no idea how much psi those can withstand, and opening the valve would be slow...

Thanks
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Unread postAuthor: jrrdw » Sat Sep 16, 2006 6:25 pm

You need to build some pressure before the ammo starts moveing. Then a fast release out through the barrel, but you should know this allready. You should mod the barrel to add a burst disk, a piece of alumium foil inbetween the blow gun and ammo.
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Unread postAuthor: StClingin » Sat Sep 16, 2006 6:30 pm

Can you please explain more about this burst disk?
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Unread postAuthor: noname » Sat Sep 16, 2006 6:40 pm

The burst disk will keep air behind it until enough pressure builds up behind it, causing a rush of air when the disk bursts.
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Unread postAuthor: CS » Sat Sep 16, 2006 6:49 pm

<a href="http://www.spudfiles.com/spud_wiki/index.php?title=Burst_disk">Burst Disk</a>
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