Pneumatic: minipump Marines paintjob gift

Just build a cannon and want to show it off? Post it in here.

Postby 1313 » Sat Jun 25, 2005 1:18 pm

That thing looks very cool, and sorry to act noobish but can someone explain how this gun actually works? THanks.
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Postby draculon » Sat Jun 25, 2005 3:39 pm

http://localhost/forums/viewtopic.php?t=9135
A couple of posts down, there's a flash animation on how it works.
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Postby clide » Sun Jun 26, 2005 4:15 pm

The version 4 minipumps work different from this kind. I've started on a flash animation for this kind. I'll try to finish it up and post it later today.
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Postby draculon » Sun Jun 26, 2005 4:57 pm

Ooops, i thought that was the right one, oh well. i can't wait for this new animation to see the difference.
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Postby clide » Sun Jun 26, 2005 9:53 pm

<embed src="http://gbcannon.com/flash/minipumpv3.swf" quality="high" bgcolor="#ffffff" width="550" height="150" name="minipump v3" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash">

I didn't really feel like drawing the pressure on it...maybe later. But its basically just a coaxial in a tee valve with a hose running from the pilot to the end of the pump. Once the pump passes where the hose is connected, the pilot is exhausted on the other side of the pump.

If you need a better explaination of how the valve itself works then check out the piston valves explained visually sticky in the pneumatic section.
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Postby tatorassassinator » Sun Jun 26, 2005 10:15 pm

I always wondered why the tube was there but now i get it. After it is extended you pull back the pump which makes pressure. When the block that blocks off the air goes past the tube, the air in the tube is let out and the piston goes back. Right? I think i understood what you were saying

Couldnt you put the hose back a little bit and hook a blowgun in the middle of the hose? Then you could hold pressure for a while and get a better aim. When you pull the last bit of the pump you wiggle and lose your aim so a blowgun would be better...i think.
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Postby clide » Mon Jun 27, 2005 2:00 pm

You could, but it would be more expensive and I don't know that it would help out your aim very much at all, plus I like not having to have a separate exhaust valve.
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