New marker design.. 2x tube bclosed bolt, lots of detail.

[Vegeta]

The pic explains all.. bolt goes back, pushed powertube on top back, ball drops in as bolt hita valve, air goes up, pushes ball outs nad pwr tube closed, and the linkage rod pushes bolt back behind sear.

I knwo the sear is whaky... it will take me time to design a good one.

ANy comments? possible problems?

[wes]

SWEET!!!!!

[Vegeta]

Well i see a problem. When that powertube goes back air will go out the back of the gun... Need to have non-moving assembly w/oring there to stop air fron shooting out hte back.. ok? just mentally add that in.

[kilaueakid]

won't the air be coming out of the bolt before it is closed? maybe i missed something. I will look again. cool design though.

[kilaueakid]

ohhh i gotch ya now....top bolt is like a mag bolt...duhhh...it must be late. That is cool.

[ciaran.mooney]

Is it going to have an internal reg? So it can run Co2 and HPA?

[Vegeta]

I suppose there could be a reg put in the valve that is adjusted in the back of the gun but you would have to unscrew the reg to get the back block off. I am still pondering how to seal off that top bolt in the back.. I guess just make the end flat with o-rigns but that could slow down bolt travel if not lubed good.And I cant have an end cap becuase then hte bolt would still have to go through the end caps holes. I'll find a way.

[ciaran.mooney]

What would the benefits of this system be exactly? And how does the bottom bolt return to its original position?

[Vegeta]

the powertube is blown foreward by the air like a mag... btu this is laos pullign hte back bock with it, and therefore hte linkage/timing rod pushes hte bolt back over hte sear and latches.

[dorksquad]

i know you said that you need to work on it but with that sear design i dont think that it will hold the bottom bolt/striker in the cocked position, you need to reverse the hook in the sear and on the bolt/striker, (just a thought unless you come up with something better)

[Vegeta]

Yea i rushed that on there, it should be like this:

[rhetor22]

If I am reading this correctly, the ball would have to drop into the chamber VERY fast.

If I could, with your permission, put this into an animation so that its easier to understand, that would be great.

[pbjosh]

I am sorry but I think I will burst your bubble a bit. I am designing a gun and have built a pre-production prototype electro-pneumatic closed bolt spool valve gun. With out some sort of feed system or ACE, I have to let my bolt be open for 50 ms or better to maintain a good flow of paint. If I shorten that time, I can run into bad flow problems. Here is my current timing settings:

Solenoid 1 (valve)- open 3-4 ms at the least, 10 ms standard
Solenoid 1 off
10 ms break
Solenoid 2 on for 50ms, then off.

You are looking to feed a paintball in 3-4 millisec. Won't work. If you get a ball to feed that fast, the ball will hit the breech so fast it will break. Also, the bolt looks like it is one piece. If that is the case, the air will feed out of the bolt venturies faster than the bolt will close, and the air will go up into the breech and feed tubes, breaking paint into the loader. I have had my design do the same with bad timing.

As for layout, I like it. The design needs to go more like the cocker though, and you need to try looking at a sterling pump. It is the same basic idea, but with a nelson type hammer up front. Have the trigger release the hammer, and then have the hammer poppet valve, and hit a 4-way for the bolt, like the AT-85. Then have the bolt cycle back, and then recock the hammer on the way forward.

Or you could have the hammer be blowback, and the bolt be a 2-piece blow forward design. If you are interested in what I have done on a similiar design of mine just ask. I may have some solutions.

Josh

[Vegeta]

Well thats what hte timing / linkage rod is for.. its adjustable. the idea is that the powertube should be back and open a little bit before the bolt hits. My drawign isnt to accurate, for I belive hte botl should be further back to give the powertube more time to get open. Basiclaly, the timign can be adjusted to maek ti shoot perfect, but if you go to far the gun will shoot late, and not go enough it will chop like hell.

Sure, you can animate it, I just don't want anyone to take this to another forum.. I had thoguths to release it at all.

[Vegeta]

here ... thsi shows how much time you'll have.. i didnt have time ot do the CAD work or physics to figure out exact timing.