Looking to build an airsoft mortar

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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timebmb757
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Similar to this one:


Now, by the looks of it, this one uses a QEV valve with some sort of trigger that I cant really identify due to the quality of the video.

What Im trying to figure out is how does he make it fire more than once without having to refill the really small looking pressure chamber, and how does that trigger work?

Any ideas?
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Lockednloaded
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I have looked at this quite abit as well.. he uses a slide valve to trigger it, but it is hooked up to an air source, probably a paintball tank. Take a look at my semi auto discussion in the pneumatic cannon discussion thread, it should help you.
EDIT:: Link found posted below
http://www.spudfiles.com/forums/semi-auto-t20061.html
hope this helps :)
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timebmb757
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Thanks a ton dude. That helped alot.

Another question, is it ok to use CO2 with QEVs? Specifically the one listed in your thread Lockedandloaded.


Also, anyone have any good ideas for a bipod?
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deathbyDWV
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How he gets multiple shots is... He has a co2 source connected to the other side of the slide valve. The hose is hidden behind his arm...
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timebmb757
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deathbyDWV wrote:How he gets multiple shots is... He has a co2 source connected to the other side of the slide valve. The hose is hidden behind his arm...
Impossible, where would the QEV be venting to in that case?
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MrCrowley
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timebmb757 wrote:
deathbyDWV wrote:How he gets multiple shots is... He has a co2 source connected to the other side of the slide valve. The hose is hidden behind his arm...
Impossible, where would the QEV be venting to in that case?
Out of the slide valve...when you trigger a slide valve, it closes the air input and vents the pilot. When it goes back in to position it closes the pilot vent and fills the cannon. You can see a leaf move by his hand everytime he triggers it.
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timebmb757
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MrCrowley wrote:
timebmb757 wrote:
deathbyDWV wrote:How he gets multiple shots is... He has a co2 source connected to the other side of the slide valve. The hose is hidden behind his arm...
Impossible, where would the QEV be venting to in that case?
Out of the slide valve...when you trigger a slide valve, it closes the air input and vents the pilot. When it goes back in to position it closes the pilot vent and fills the cannon. You can see a leaf move by his hand everytime he triggers it.
I stand quite corrected.
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