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This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Re: 2018 project

Unread postAuthor: farcticox1 » Sat Dec 16, 2017 5:59 pm

Got a carry handle attached

20171216_175827.jpg


Might attach a sight to the top :idea:

images.jpg
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Slotted the stock rail so it slides in and out quickly

20171216_175924.jpg


I guess I should slow down a bit, this was my 2018 project :shock:
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Re: 2018 project

Unread postAuthor: hectmarr » Sun Dec 17, 2017 11:58 am

It sounds excellent how it shoots, and everything looks very good. The only thing that left me sad is that you filled that pretty girl with holes. :)
If you want you can try this :bounce: :bounce:
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Re: 2018 project

Unread postAuthor: farcticox1 » Fri Jan 19, 2018 9:16 pm

Added a laser pointer and an aiming ring so it sort of looks like a red dot sight :o

009 (5).jpg

009.jpg


A modification to the plunger stop should allow the option of a 2 round burst fire :idea: if it works :? the plunger goes 6mm below the opening so 2 BBs should enter the chamber.

009 (2).jpg
009 (1).jpg
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Re: 2018 project

Unread postAuthor: jackssmirkingrevenge » Wed Jan 24, 2018 7:41 am

Really loving the look, great job as always!
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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Re: 2018 project

Unread postAuthor: farcticox1 » Sat Aug 04, 2018 5:24 pm

Pulled it apart and started again, just couldn't get it how I wanted it. Made it pump action :D making a QEV :idea: got a nice little normally open 3/2 valve for the trigger. Made a stainless chamber.

007 (1).jpg
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Re: 2018 project

Unread postAuthor: hectmarr » Sat Aug 04, 2018 8:09 pm

It looks excellent!
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Re: 2018 project

Unread postAuthor: farcticox1 » Sun Aug 05, 2018 11:19 am

QEV worked when tested at 100psi, fixed a leak then turned it up to 140psi and the rubber seal blew out through the exhaust :shock: Need to use a harder rubber :idea: I fixed it with a small screw in the centre thinking it would be more secure and easy to replace.
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Re: 2018 project

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Re: 2018 project

Unread postAuthor: hectmarr » Sun Aug 05, 2018 2:05 pm

A question. Can not suppress QEV and shoot directly from valve 3/2? I have tried and quickly open the air outlet to shoot :roll:
I use a 5/2 because I do not have a 3/2, but you can shoot with the escape route, or depressurization. Mine only resists up to about 130 psi.
In the diagram, Blue charging air, and Green, air for shooting.
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Re: 2018 project

Unread postAuthor: farcticox1 » Sun Aug 05, 2018 3:12 pm

Of course, the QEV is a bit more compact and I wanted to make one though. :D
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Re: 2018 project

Unread postAuthor: hectmarr » Sun Aug 05, 2018 3:27 pm

farcticox1 wrote:Of course, the QEV is a bit more compact and I wanted to make one though. :D


you mean you hold more pressure? If you are going to build a QEV, I will be careful because I do not have a QEV and I want to copy how you make it. :)
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Re: 2018 project

Unread postAuthor: farcticox1 » Sun Aug 05, 2018 4:39 pm

I think it will hold more pressure, the parts I used are each rated at 800psi, the 4mm plug in connector is only 150psi but that is not part of the QEV.

These are the parts I used https://cdn.automationdirect.com/static ... ttings.pdf
I had to make the threads deeper in the T to get it more compact, and tapped through the 1/2" x 1/4" bush to get the stub threaded from the inside, so also need a 1/4" and 1/2" NPT taps.

QEV 02.jpg
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The stub I shaped in the drill press
qev stub.jpg


How it sits in the T
qev T.jpg
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Re: 2018 project

Unread postAuthor: hectmarr » Sun Aug 05, 2018 5:29 pm

Very clear construction. I will try, in the future, to do something similar. Thanks for the info.
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Re: 2018 project

Unread postAuthor: farcticox1 » Mon Aug 06, 2018 7:18 pm

new harder rubber seal on piston
piston (1).jpg


This is what I used for the piston, block of nylon cut with a hole saw with the centre bit removed
piston (2).jpg
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Re: 2018 project

Unread postAuthor: hectmarr » Tue Aug 07, 2018 8:49 am

I was watching on YouTube several tutorials on auto construction of a QEV. Actually I think I'm going for a 3/2 high pressure valve. This one that I have in mind, is up to 100 bar about 1400 psi, more than enough.
This is: http://www.directindustry.es/prod/jaksa ... 39032.html
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Re: 2018 project

Unread postAuthor: farcticox1 » Thu Aug 09, 2018 7:25 pm

Got the new piston seal in and tried it at 150psi, homemade QEV is the way to go, it is really impressive, will have to do a chrono test when I get it completed.
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