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7mm Airgun- Concept Only, Design Needed!

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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Unread postAuthor: warhead052 » Thu Jan 12, 2012 11:28 am

Jack, all my 1/4" fittings are almost exactly 8mm ID. Give or take a few .1mm's and it would be exact.

Doctor, just to clear things up a bit, since the thread is kind of hard for me to understand, do you want a quick exhaust valve rifle, or a hammer valve rifle?
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Unread postAuthor: evanmcorleytv » Thu Jan 12, 2012 7:48 pm

jackssmirkingrevenge wrote:
MisterDoctor wrote:It's only 1/4". Is that even going to work? I would think it's going to bottleneck.


Most fittings have bigger internal diameters than the nominal one, all the 1/4" fittings I have are at least 8mm ID.

On the other hand, going to a 1/2" valve will give better performance, the barrel will choke the flow but air will be fed at a faster rate than the 1/4" valve.

if you want it to have a better, and faster rate of power, then use a 3-way valve for the pilot


A slide valve is a 3 way valve...


Yes, but you'd have to machine a trigger for that slide valve, I was suggesting a 3-way valve with a trigger BUILT IN
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Unread postAuthor: Gun Freak » Thu Jan 12, 2012 7:52 pm

Just epoxy or clamp something to it... No machining necessary...
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Unread postAuthor: warhead052 » Thu Jan 12, 2012 8:18 pm

evanmcorleytv wrote:Yes, but you'd have to machine a trigger for that slide valve, I was suggesting a 3-way valve with a trigger BUILT IN


Evan, all you have to do is buy a hose clamp, and put it around the slide valve. May not be very comfortable at first, but after some jb weld or bondo, it will feel pretty good.
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Unread postAuthor: evanmcorleytv » Thu Jan 12, 2012 9:39 pm

warhead052 wrote:
evanmcorleytv wrote:Yes, but you'd have to machine a trigger for that slide valve, I was suggesting a 3-way valve with a trigger BUILT IN


Evan, all you have to do is buy a hose clamp, and put it around the slide valve. May not be very comfortable at first, but after some jb weld or bondo, it will feel pretty good.


It's still NOT a trigger. And no, you would get an L bracket, and then hose clamp THAT to the slide valve.
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Unread postAuthor: Lockednloaded » Thu Jan 12, 2012 9:45 pm

evanmcorleytv wrote:Yes, but you'd have to machine a trigger for that slide valve, I was suggesting a 3-way valve with a trigger BUILT IN


Its really not that hard...
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Unread postAuthor: velocity3x » Thu Jan 12, 2012 9:56 pm

evanmcorleytv wrote:It's still NOT a trigger. And no, you would get an L bracket, and then hose clamp THAT to the slide valve.

An "L" bracket hose clamped to a slide valve? "L" brackets are for book shelves. :lol: I think warhead has the better idea. The JB Weld could be shaped.
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Unread postAuthor: MisterDoctor » Fri Jan 13, 2012 9:14 am

Doctor, just to clear things up a bit, since the thread is kind of hard for me to understand, do you want a quick exhaust valve rifle, or a hammer valve rifle?


A QEV, preferably. Thank you for asking.

As for the rest, what did you guys land on? Did you agree on anything that would be a best option?
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Unread postAuthor: warhead052 » Fri Jan 13, 2012 12:09 pm

evanmcorleytv wrote:It's still NOT a trigger. And no, you would get an L bracket, and then hose clamp THAT to the slide valve.


Evan, please just stop arguing. You aren't always right. Some times yes, but not always.
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Unread postAuthor: mark.f » Fri Jan 13, 2012 1:46 pm

If you're using a QEV, a three way valve for the pilot is all you need to cycle the valve repeatedly. If you've seen jack's thread you'd see how easy that part is.

However, nobody's really stopped to talk to you about loading. Are you going to build a blow-forward bolt for semi-automatic operation, or do something like poland_spud's Mk. III with a single acting pneumatic cylinder?
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Unread postAuthor: MisterDoctor » Fri Jan 13, 2012 2:17 pm

Are you going to build a blow-forward bolt for semi-automatic operation, or do something like poland_spud's Mk. III with a single acting pneumatic cylinder?


I want a bolt action rifle, capable of shooting more than one shot preferably. Just to make things a bit easier considering this is only my second build. :lol:
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Unread postAuthor: evanmcorleytv » Fri Jan 13, 2012 6:12 pm

Lockednloaded wrote:
evanmcorleytv wrote:Yes, but you'd have to machine a trigger for that slide valve, I was suggesting a 3-way valve with a trigger BUILT IN


Its really not that hard...


warhead052 wrote:
evanmcorleytv wrote:It's still NOT a trigger. And no, you would get an L bracket, and then hose clamp THAT to the slide valve.


Evan, please just stop arguing. You aren't always right. Some times yes, but not always.


Warhead, I' wasn't arguing, I was telling you another way to make a trigger, and I was telling you my personal opinion on the "trigger issue."

AND this is what I meant. It seems MUCH easier.

Image

AND just as JSR stated earlier, HE CAN'T EVEN USE THE SLIDE VALVE BECAUSE OF TH BSP THREADS.
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Unread postAuthor: Gun Freak » Fri Jan 13, 2012 6:24 pm

You'll find that in practice that L bracket will slip out quite easily. Some adhesive would be necessary.
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Unread postAuthor: evanmcorleytv » Fri Jan 13, 2012 6:34 pm

Gun Freak wrote:You'll find that in practice that L bracket will slip out quite easily. Some adhesive would be necessary.


of course, i never said that you wouldn't need it!! haha
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Unread postAuthor: warhead052 » Fri Jan 13, 2012 8:24 pm

Meh, an L bracket just isn't comfortable. I wouldn't like it very much at all. I would prefer a bondo or jb weld trigger over that.
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