belt fed cartidges

Lockednloaded · Fri Dec 31, 2010 7:44 pm

I would love to have a cartridge firing semi auto gun, but with my tools, making huge amounts of cartridges takes far too long. I cant risk losing the cartridges when they eject, so I want to make a belt fed gun. I know belt fed pneumatics have been done before, but I haven't seen any design sketch on how the work. I've been thinking a whole lot about this, and I haven't get a thing!

any help is appreciated, this is confusing me to the highest degree

Cannibal Corpse · Fri Dec 31, 2010 8:03 pm

http://science.howstuffworks.com/machine-gun9.htm

metalmeltr · Fri Dec 31, 2010 10:44 pm

The designs shown there would not do what he wants, he wants the cartridges contained in the belt, so they wont be lost. Think nerf vulcan.

irisher · Fri Dec 31, 2010 10:47 pm

I think you will have problems with the belt fed concept. Although it is cool, there are very few working cartridge pneumatics and they are very limited in available power for an operating mechanism. The belt concept is almost guaranteed to increase the recoil force needed and therefore is most likely impractical to use.

metalmeltr · Fri Dec 31, 2010 10:53 pm

irisher wrote:I think you will have problems with the belt fed concept. Although it is cool, there are very few working cartridge pneumatics and they are very limited in available power for an operating mechanism. The belt concept is almost guaranteed to increase the recoil force needed and therefore is most likely impractical to use.

Not necessarily, if your cartridges were miniature coaxials piloted by a schrader you could keep them in the belt and trigger them in a different manner, a rotating spur comes to mind.

irisher · Fri Dec 31, 2010 11:16 pm

oh.. I just realized I skimmed a bit and thought he wanted the carts to be extracted from a belt and separately ejected.

Lockednloaded · Sat Jan 01, 2011 5:18 pm

I don't want self-contained cartridges like JSR, I just want them to hold ammunition seperate from the valve

metalmeltr · Sat Jan 01, 2011 8:26 pm

ok then think about something like the nerf gun, that is exactly what it does

Lockednloaded · Sat Jan 01, 2011 9:40 pm

I think the nerf gun is electronically fed, so I don't really want to go down that road

metalmeltr · Sat Jan 01, 2011 9:46 pm

The belt i belive is electrically advanced

Vincenzo · Sat Jan 01, 2011 10:24 pm

I'm sure you could figure out a way to use a couple cylinders to load a cart into the breech and another to push a seal into one of the carts... sounds like a job for a 3-way to me. Kind of hard to explain what I'm thinking though.

Lockednloaded · Sat Jan 01, 2011 10:35 pm

a belt may be excessive for semi auto, but it seems like it would be simpler than a revolver.

I have a three way and an air cylinder, but I can't think of a way I could cycle the belt

Vincenzo · Sun Jan 02, 2011 6:32 pm

How about something like this? It's really rough but you should get the idea. When the cylinder retracts, a new cart could be loaded in (somehow

).

PVC Arsenal 17 · Sun Jan 02, 2011 9:42 pm

Vincenzo wrote:a new cart could be loaded in (somehow ).

That's the thing... it's surprisingly difficult. I suggest taking inspiration from the Nerf Vulcan and solving the problem with electronics. It's much easier to accomplish indexing that way rather than with pneumatic mechanisms when your access to tools and such is limited.

Lockednloaded · Sun Jan 02, 2011 9:52 pm

http://s31.photobucket.com/albums/c385/Spudtech/

way too complicated

maybe i should look into alternative cartridge systems...