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How do i make this 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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How do i make this semi auto?

Unread postAuthor: Goats spudz » Tue Aug 30, 2011 2:20 am

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Unread postAuthor: jackssmirkingrevenge » Tue Aug 30, 2011 2:27 am

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Unread postAuthor: Goats spudz » Tue Aug 30, 2011 2:29 am

jackssmirkingrevenge wrote:http://www.ebay.com/itm/Slide-shut-off-Valve-1-4-bsp-Female-Air-Compressor-/120676803726?pt=LH_DefaultDomain_3&hash=item1c18e5e48e
i mean like a shot every time you press the trigger, couldn't i use a blowgun
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Unread postAuthor: jackssmirkingrevenge » Tue Aug 30, 2011 2:44 am

You need to mod the QEV for chamber feeding if you're using a blowgun, basically unscrew it, poke a small hole through the diaphragm (NOT the part that covers the seat, between the seat and the valve wall) and put a small spring between the diaphragm and the rear of the valve.
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Unread postAuthor: Goats spudz » Tue Aug 30, 2011 3:29 am

<3 for jsr but when it fires, the shot isnt like a bang its a hiss
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Unread postAuthor: wyz2285 » Tue Aug 30, 2011 3:31 am

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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: jackssmirkingrevenge » Tue Aug 30, 2011 3:31 am

Hmmm... I said poke a small hole, you didn't go an poke a big one did you?
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Unread postAuthor: wyz2285 » Tue Aug 30, 2011 3:34 am

no, I still want the qev to be sensitive
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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 » Tue Aug 30, 2011 3:37 am

i think it may have been a little big shall i tape over it and poke a smaller one through the tape (insulation tape)
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Unread postAuthor: jackssmirkingrevenge » Tue Aug 30, 2011 4:05 am

Goats spudz wrote:i think it may have been a little big shall i tape over it and poke a smaller one through the tape (insulation tape)


I don't think tape will cut it, epoxy ;) remember it doesn't need to be more than 1mm diameter.
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Unread postAuthor: Goats spudz » Tue Aug 30, 2011 4:17 am

I covered the hole and changed to a 1.5mm drill bit (the smallest that will fit in the chuck) and put the hole in the right place this time (i put the big one that's covered where the thin rubber is :L) and it works but with my bike hand-pump i can get 2 shots from it, if i get a fridge compressor and take it to about 55 bar will i get lots of high power shots?
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Unread postAuthor: jackssmirkingrevenge » Tue Aug 30, 2011 4:25 am

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Unread postAuthor: Crna Legija » Tue Aug 30, 2011 4:58 am

Goats spudz wrote:I covered the hole and changed to a 1.5mm drill bit (the smallest that will fit in the chuck) and put the hole in the right place this time (i put the big one that's covered where the thin rubber is :L) and it works but with my bike hand-pump i can get 2 shots from it, if i get a fridge compressor and take it to about 55 bar will i get lots of high power shots?


can you post it before you take it to 55bar, that kind of pressure is nothing to be playing with.
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Unread postAuthor: Goats spudz » Tue Aug 30, 2011 6:53 am

Crna Legija wrote:
Goats spudz wrote:I covered the hole and changed to a 1.5mm drill bit (the smallest that will fit in the chuck) and put the hole in the right place this time (i put the big one that's covered where the thin rubber is :L) and it works but with my bike hand-pump i can get 2 shots from it, if i get a fridge compressor and take it to about 55 bar will i get lots of high power shots?


can you post it before you take it to 55bar, that kind of pressure is nothing to be playing with.
most of it is high pressure hydraulic fttings and the tank is rated to 3000 psi
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Unread postAuthor: jackssmirkingrevenge » Tue Aug 30, 2011 6:56 am

Goats spudz wrote:most


... but like a chain, it's only as strong as the weakest component ;)
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