Custom

[Legion]

Blow forward concept

One inch tube, vert feed, pnuematic trigger. cocker threads.

Ok basically here it is, what we have is basically a high pressure reservoir, on/off, a power tube and a bolt. This will draw similarities to an automag where any blow forward would however differ in many ways.

The focus of this design is simplicity, durability, and ease of manufacture. With that in mind let me walk you through how I think this should work. Please feel free to rip holes in this design, as I am hoping the collective can help me built this properly.

Basically you have a 400 psi Dump chamber of regulated air that is open to the plunger of the bolt that sits in the power tube. When, the sear disengages the plunger moves forward from the pressure. At the same time the motion of the sear disengaging closes the on/off sealing off high pressure air from the bolt plunger.

Once the plunger clears the relief hole in the power tube the compressed air escapes and pushes through the hole into the bolt face. The ball is already in motion from the moving bolt which is attached to the plunger. The escaping air pushes the ball out the barrel.

Now that the pressure has decreased the bolt spring (not shown) pushes the bolt backwards into the power tube and the sear reengages from spring pressure, at the same time the spring return (above the on/off ) pushes the on/off back open preparing for another shot.

Questions comments welcome.




Forgive my crude renderings im away from my cad software and had to use limited work resources. I left the bolt return spring out of the drawing and its assumed that you know the on/off and sear spring are compressed during motion.

[L.I Caretaker]

So the ram pops the sear,Air escapes, an spring pushes back bolt ,,,What if you get back pressure up feedneck...could cause balls to break..The Bolt has to be light weight to reduce drag....Remember the Old Icon Bolt design...

[Legion]

Yep semi auto. A very simple semi auto. lOl the kind my brain can understand. where is Hp lovecraft when you need him?

[russc]

Hey look, it's an automag! Except of course, your dump chamber looks way too small to house enough gas, unless it's running a pretty high pressure maybe?

I think you're stumbling in the design of the pressure chambers and paths. You won't be able to get proper velocity from such a small reservoir, plus it seems like it has the opportunity to escape into quite a large body cavity as the bolt moves forward, and even worse, it seems that gas would more readily fill the body cavity than it would flow through the very small port in the bolt.

[Legion]

According to my calculations a 3/4 inch by 1 inch cavity at 400 psi should house more than enough volume to push a ball to 300 fps. I could be wrong. Lots of simlarities to a mag except one, its simplified, two its dependant on an outside regulator source and three it can be built in any home shop.

The bolt plunger is extended out the back instead of riding inside the bolt. much much easier to produce than the standard mag bolt.

The mag has high tolerances (god i love them) this would be a poor mans version mainly just to see if i can build it and make it work.

The design borrows heavily from the badger which borrowed heavily from the automag.

[brycelarson]

isn't this a slightly simplified version of the Ice Epic?

[Legion]

isn't this a slightly simplified version of the Ice Epic?

Could be as i am unfamilar with that marker. Although i have always wanted to get my hands on one.

I came up with this after reading about the austrailan badger. I put the focus on being able to machine them with my limited equipment.

[russc]

simpler.JPG

See, the magish design is almost the same but offers more firing chamber volume, a more direct path to the ball and doesn't offer expansion inside the body between the valve and ball. Your design has essentially turned the mag bolt and powertube inside out and backwards.

[A.C. Basbas]

Originally Posted by brycelarson

isn't this a slightly simplified version of the Ice Epic?

Simplified Ice Epic, simpified 'Mag, all apply... But, in being simplified, it is inherintly different and that would be the point of a new marker. Look at Egos... so popular, shiny and new, but basically just a lightened fancier version of the Timmys that people were shooting yeaaaaaars ago.

Innovation doesn't necesarily mean great leaps.

Anyway, it looks like a SLG to me (trying to think of the newest blowforward like this...) but it's got potential. Legion, do you have an intention of producing something like this?

[Legion]

See, the magish design is almost the same but offers more firing chamber volume, a more direct path to the ball and doesn't offer expansion inside the body between the valve and ball. Your design has essentially turned the mag bolt and powertube inside out and backwards.

true true. The mag bolt however is a nightmare to manufacture.
These bolts would also have a hollow plunger which would increase volume, and are realitivly simple to produce on my equipment. Certainly not arguing about the simlarities.

Yes i do plan to manufacture a version of this. If for no other reason then to say i can. LOL.