firing more than once before re-pumping

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SpudFiles Forum Index » Pneumatic Cannon Discussion » firing more than once before re-pumping

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firing more than once before re-pumping

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Lentamentalisk

Posted: 09/09/2007 22:40 PM Post subject:

Resident Tinkerer
Colonel

Joined: 07 Aug 2007
Posts: 637
285.49 Spud Bux

Here is how you get multiple shots out of a single pumping:

instead of having the pilot valve vent to the open air, it vents to a second valve, lowering slightly the pilot pressure. this will trigger the QEV, until it reaches the same pressure, and then it will snap back into place, saving much of your air. Next you simply open up the second valve to reset it. close up #2 again and you are ready to fire.

I will try to post pics in a sec.

Lentamentalisk

Posted: 09/09/2007 23:25 PM Post subject:

Resident Tinkerer
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Joined: 07 Aug 2007
Posts: 637
285.49 Spud Bux

here is a picture of how the whole thing works, good luck with this.
http://flickr.com/photos/12275131@N07/1353836980/

note: you will need a manufactured QEV for this to work, homemade ones wont work.

knappengineering

Posted: 09/09/2007 23:57 PM Post subject:

Sergeant First Class

Joined: 24 Jun 2007
Posts: 136
3.38 Spud Bux

thx, i'll probably just end up putting that regulator between a filling chamber and a firing chamber, i'll let you know how it works when i finish it, i probably won't get to it until next weekend though

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