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easy way to semi auto

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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easy way to semi auto

Unread postAuthor: wyz2285 » Fri Oct 07, 2011 12:47 pm

Hi every body
I noticed that a lot of new members wants semi auto, and I saw a lot of explanations about slid valves and 3 ways. As I wasn´t able to find these parts, I decided to find a way of make a semi auto from a mechanic way instead of pneumatic way. So I had this idea, as most people here uses qevs that are piloted by a blowgun, by connecting the blowgun trigger with a ball valve for re charging the secondary chamber( when you pull the blowgun trigger, the ball valve closes, when releases the trigger, the ball valve opens with a spring) as the ball valve doesn´t need to be fully open to recharge the secondary chamber quickly
this system should work with blowgun piloted self close qev/piston valve or bb guns what uses a blowgun as firing valve
If I wasn´t clear enough here is a diagram, feel free to ask questions :)
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: FighterAce » Fri Oct 07, 2011 12:51 pm

Thats gonna be one hell of a trigger pull... at least it would be with the stiff ball valves I got around :lol:
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Unread postAuthor: wyz2285 » Fri Oct 07, 2011 12:55 pm

no it won´t be hard to pull the trigger :roll: 1/4 ball valves are really easy to open, so you can use a weak spring...
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Goats spudz » Fri Oct 07, 2011 2:55 pm

wouldn't the main chamber de-pressurize when you pull the trigger because it will all exhaust before the ball valve is shut and where can i get a popoff valve in the UK thats not expensive or how do you make them.
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Unread postAuthor: wyz2285 » Fri Oct 07, 2011 3:29 pm

the ball valve wasn´t fully opened, so a slight movement will shut it down
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: Goats spudz » Fri Oct 07, 2011 3:50 pm

wyz2285 wrote:the ball valve wasn´t fully opened, so a slight movement will shut it down
Ok :D
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Unread postAuthor: Gun Freak » Sat Oct 08, 2011 4:05 pm

I think it's a good idea! With a 1/4" ball valve it should be an easy trigger pull.
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