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My valves and fittings, what to build

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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My valves and fittings, what to build

Unread postAuthor: matti » Mon Oct 11, 2010 11:58 am

Hi.. i have collected a lot of valves, and they are not the cheapest ones.
i would like to show them to you, and if you get any ideas what to build of them please tell me :D
I can use cnc-mill and other machining tools at work.

here is the valves and stuff.
http://s972.photobucket.com/albums/ae208/rdx_/spudguns/


-my english is not very good, so i wont write too much.
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Last edited by matti on Mon Oct 11, 2010 2:42 pm, edited 1 time in total.
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Unread postAuthor: Technician1002 » Mon Oct 11, 2010 1:24 pm

Hmm, another QDV. You can use much shorter ports. Do the math for the total area of the ports compared to the cross sectional area of the barrel. With short ports, a short lighter piston with less travel can be used. I use 3 ports in mine. They are twice as wide as they are tall and the port area is still almost twice the area of the barrel.

You will like the performance. Use floating o rings for a low friction valve.
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Last edited by Technician1002 on Mon Oct 11, 2010 1:32 pm, edited 1 time in total.
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Unread postAuthor: POLAND_SPUD » Mon Oct 11, 2010 1:27 pm

lol if you were a girl I'd marry you :D

My suggestion - build a semiautomatic pneumatic gun (QEV + DCV + aircylinder combo)

here is one cannon that is have been designing with solidworks

What kind of gun is it? A hybrid or a pneumatic ?? Reminds me of the design I might use for a semiauto hybrid

[youtube]http://www.youtube.com/watch?v=Wh2mjng8848[/youtube]

Well it seems you've got more than enough valves to build a nice hybrid (or even a semiauto hybrid).
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Children are the future

unless we stop them now
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Unread postAuthor: matti » Mon Oct 11, 2010 2:47 pm

Technician1002 wrote:Hmm, another QDV. You can use much shorter ports. Do the math for the total area of the ports compared to the cross sectional area of the barrel. With short ports, a short lighter piston with less travel can be used. I use 3 ports in mine. They are twice as wide as they are tall and the port area is still almost twice the area of the barrel.

You will like the performance. Use floating o rings for a low friction valve.


Hi Tech, if you remember we have been talking about that cannon with PM and chat :D I know the ports are not good in the pic, but i will draw new ones in the future.. i deleted the link from the post, because it confuses people from the post subject. But thaks :)
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Unread postAuthor: Technician1002 » Mon Oct 11, 2010 5:48 pm

It looked familiar. :o You haven't posted much recently. Have you built one yet?
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Unread postAuthor: matti » Tue Oct 12, 2010 4:27 am

Technician1002 wrote:It looked familiar. :o You haven't posted much recently. Have you built one yet?


I was in the army and got out of there now... I have some parts and pipes for that qdv cannon, but I have not started yet.
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