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 Semiauto design; piston/hammer valve type « View previous topic :: View next topic » 
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jackssmirkingrevenge
PostPosted: 03/07/2008 12:24 PM    Post subject: Reply with quote

space monkey
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Try this one.
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Jared Haehnel
PostPosted: 03/07/2008 12:26 PM    Post subject: Reply with quote

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Cool Nice!!!! But for 550...I think I'm going to pass....
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Antonio
PostPosted: 03/07/2008 14:48 PM    Post subject: Reply with quote

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yeah these paintball conversions are really cool! They even have bbs with fins at the back with have a lower drag coefficient so fly further. If I had these in a shop nearby I would buy one for sure. I think it has a CO2 tank in the buttstock. The only thing that kinda sucks is that u will have all these plastic cups laying on the field ur playin.
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Sticky_Tape
PostPosted: 03/07/2008 14:59 PM    Post subject: Reply with quote

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jackssmirkingrevenge wrote:
How were you planning on cocking the bolt?

I don't think you have to because the bolt would come back anyway so all you need is a valve behind the hammer valve that would allow air in through the hammer valve and push the bolt forward.
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Sticky_Tape
PostPosted: 03/07/2008 15:03 PM    Post subject: Reply with quote

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jackssmirkingrevenge wrote:
Try this one.


try this one Smile http://www.youtube.com/watch?v=Na_o3IAFXtI&NR=1
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Hawkeye
PostPosted: 03/07/2008 15:09 PM    Post subject: Reply with quote

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Now I can't find it or remember the link. It was all homemade conversion though. I think a Brass Eagle base with a customized barrel addition etc.
Perhaps I should have said stumbled across, although after you see it who knows.... He did use some Epoxy in the conversion.

Edit: "Unconventional Airsoft"
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jackssmirkingrevenge
PostPosted: 03/08/2008 9:38 AM    Post subject: Reply with quote

space monkey
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Ah, you mean this one? I was familair with it, that's a good web page Smile
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Antonio
PostPosted: 03/08/2008 13:42 PM    Post subject: Reply with quote

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pretty cool gun. I was thinking of just buying a airsoft gas magazine and making my own gun around it. It would only cost 25E then. I would convert the co2 tank in the mag to a colabottle below it.
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Antonio
PostPosted: 06/22/2008 13:38 PM    Post subject: Reply with quote

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jackssmirkingrevenge wrote:
How were you planning on cocking the bolt?


I rethought this one over. I think this concept is doable as I got autofire but without bbs fireing. I was thinking of pumping air between the bolt and the poppet valve. So if you drill a small hole between those parts you can easily connect a bikepump to it:) So there wont be need for mechanical levers or something. This will make it smaller and less vonurable. I hope you know what I mean
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Antonio
PostPosted: 06/25/2008 3:24 AM    Post subject: Reply with quote

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At the moment I am working on a prototype of this idea:

I know Jack has tested it as well, but I think this design is promising as there are not that many moving parts. I'll post an updated animation soon:)
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jackssmirkingrevenge
PostPosted: 06/25/2008 8:40 AM    Post subject: Reply with quote

space monkey
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ant wrote:
I know Jack has tested it as well, but I think this design is promising as there are not that many moving parts.


I had illustrated the concept but didn't actually make a prototype so the ball's in your court. The theory seems to be sound, all we need is for someone to make it work, and I'd say you've got the right credentials Wink
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Antonio
PostPosted: 06/25/2008 11:13 AM    Post subject: Reply with quote

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The animation I made some time ago.
The yellow circles are O-rings btw



Untitled4.gif
 Description:
The animation I made some time ago.
 Filesize:  286.75 KB
 Viewed:  42 Time(s)

Untitled4.gif




Last edited by Antonio on 07/04/2008 4:37 AM; edited 1 time in total
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Tom
PostPosted: 07/03/2008 5:16 AM    Post subject: Reply with quote

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I think that it's hard to get a good seal between the hammer and the valve stem, but it's always worth trying Very Happy
G's from the Dutch, Tom
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jackssmirkingrevenge
PostPosted: 07/04/2008 5:09 AM    Post subject: Reply with quote

space monkey
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It certainly looks good in theory, are you going to try it out?
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Antonio
PostPosted: 07/04/2008 15:45 PM    Post subject: Reply with quote

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jackssmirkingrevenge wrote:
It certainly looks good in theory, are you going to try it out?


Yeah for sure! I finally have vacation now... jaaaaaaaaaaaaa! I had my last exam today Laughing
my only problem is making the moving part(breech/bolt) out of 3 different tubes like I did on the slidevalve> the problem is attaching these 3 different sized alu pipes together. Glue wont do it as I dont have enough surface area to work at. I thought about holding ehm togetha with small nails perpendicular through it. But that would limit the flow through the breech hole. I hope u guys get what I mean.. I would be happy with some feedback:) (btw I am not making this part from epoxy as I want to keep the parts cheap and easy to make) Atm I am ganna prototype and epoxy isnt the material I have in mind> I want to go 100% ant style Very Happy

example materials I am planning to use:


edit:
this is the breech/hammer part (I dont know how to join the different alu pipes which are given in different shades of grey)



breech.JPG
 Description:
breech hammer part
 Filesize:  7.08 KB
 Viewed:  163 Time(s)

breech.JPG


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