My Gun Design

[viper_ssc]

Heh, good design BTW. Been looking at it and only 2 "issues" I can think of. 1 in the drawing, 1 in operation. They're all real minor-I think it's a great design.
1-operation- It COULD be kinda hard to get the air chamber to seat well around the actuator rod thingy just to the left of the spring. Putting orings in holes is not fun, especially in really teeny ones.
2-You drew it pretty big; you could really probably condense this down to be shorter. You upped the size of the air chamber, but what you could actually do would be to just widen it after the most left actuator seal. This would allow an overall shorter design.


I'm sure you thought of this, but for the stop on the top of the bolt you could just thread a hole to keep from having to make some weird parts. Also, are you planning on testing this thing out at all? Cause I have a small mill and lathe I'd like to try it on sometime.

1. Yes, it could be hard to get it to seat well. I'm gonna try to build it without the oring and hope it seats right, but if it doesn't I'll put a small oring on the shaft.

2. After drawing it out full size and all the body is going to be 7.5 inches long, so it's not too long. The drawing I have up was just a small one I put together relatively quickly, it's not very close to real sizing of the parts. In that drawing I could shorten it up, but with the newer drawing I have it doesn't look like there's really much room to make it shorter. Unless I make the bolt much shorter, which would make the air chamber smaller and would require higher pressure which I don't want.

" Also, are you planning on testing this thing out at all? Cause I have a small mill and lathe I'd like to try it on sometime."

Yes, I am planning on testing this, I'm just getting some money for all the materials now so it shouldn't be too long til I start building it. But if you want to make one from my design you can if you want.

[viper_ssc]

Here's the new drawing of it, everything is in proportion to the real size.

[ojhspyro89]

There, now that spring wont need to as strong and could be used for an anti chop instead to pust it up.

[viper_ssc]

I'm a little confused, how would that help it use a lighter spring? That would make it much more difficult for me to get the bolt off that ram shaft. I'll have eyes in it too, so it doesn't really need another antichop method.

[grant40k]

how long is the ram stroke?

[viper_ssc]

the ram stroke is 1 inch for bushmaster rams, if you use a different ram then you'll have to measure the stroke and change the design to fit it.

[ColdFuzion]

If you wanted to get mad technical, you could use 2 noids and an LPR to make it operate very smoothly... One noid and the LPR go to the ram-noid directs the regulated air to either ent of the rem, this is where the cycle comes from. The other noid uses the higher pressure air to fire the ball, and it releases air into the bolt right as it is forward. Just an idea.

One thing that I think is fo-sho, though. If you're using eyes, don't worry about opening up cavaties to allow for lower pressure operation. Tom Kaye, as well as many Matrix and ION owners (Including myself) have said that higher pressure is better. Fill in the area that holds air in the bolt and crank the PSI a little bit, it'll be more efficient and it will recharge faster. The only downside would be that you would have to get a wee bit stronger of a spring to compensate for more pressure behind the thing that air passes by to get to the ball... If that made any since...

-Cold

[grant40k]

the ram stroke is 1 inch for bushmaster rams, if you use a different ram then you'll have to measure the stroke and change the design to fit it.

im making a custom ram on www.clippard.com. they cost about 20bucks and are built to your specs

[viper_ssc]

If you wanted to get mad technical, you could use 2 noids and an LPR to make it operate very smoothly... One noid and the LPR go to the ram-noid directs the regulated air to either ent of the rem, this is where the cycle comes from. The other noid uses the higher pressure air to fire the ball, and it releases air into the bolt right as it is forward. Just an idea.

One thing that I think is fo-sho, though. If you're using eyes, don't worry about opening up cavaties to allow for lower pressure operation. Tom Kaye, as well as many Matrix and ION owners (Including myself) have said that higher pressure is better. Fill in the area that holds air in the bolt and crank the PSI a little bit, it'll be more efficient and it will recharge faster. The only downside would be that you would have to get a wee bit stronger of a spring to compensate for more pressure behind the thing that air passes by to get to the ball... If that made any since...

-Cold

The 2 noids and stuff I can't do, that'd be too much for me.

So I should close make the air chamber smaller? Thats a good idea, maybe I'll make two bolts each with different air chambers and see which is more efficient. But a smaller air chamber will make the design much shorter since I can use a shorter bolt.

[MyChemicalRomance]

You should definently draw some various views of it in autocad and then inventer and get a 3d model so it will be easier to mill. Also GET A PATENT if it works well that is, but for real people will steal it like crazy if you dont...

[viper_ssc]

You should definently draw some various views of it in autocad and then inventer and get a 3d model so it will be easier to mill. Also GET A PATENT if it works well that is, but for real people will steal it like crazy if you dont...

I have no access to any autocad, inventor or anything like that, for some of the machining I'll send it to K&P Customs or some local place and they don't have a CNC mill so getting an cad design would be useless. Patents cost way too much money for me at the time, I'm only 15 years old and don't have very much money. If someone else steals it I have a few other designs I've made that I could patent later when I get enough money.

[ScatterPlot]

So again, what did you use to make them gifs? Very nice.

[viper_ssc]

Macromedia Flash MX

Thats what I used to make them.

[ColdFuzion]

No, not really shorten, unless you want to.. I was thinking more of making the air chamber in the bolt smaller by keeping it the same length, but making the inner cavity less wide.. Shortening would work, though.

-Cold

[RazorMonkey]

The problem that I see is that you'll need to either experiment or calculate to find a balance of dump chamber size and pressure... Pressure plays a big part in this, as you can't increase the pressure all that much without changing the spring, unless you use a mad-heavy spring to begin with... But you don't want to have to put so much pressure into the ram to open the dump chamber that you'd be "violently" impacting the ball... But yeah...