Hmmm, Rotary syle bolt?

[ScatterPlot]

In paintball guns all the bolts i have seen are just ways to get the ball out of the feed tube and fired. This makes it go forward and backward, overcoming inertia. But what if you made a bolt based on rotary engines? It would be a circle with many pits in it to hold balls. When you pulled the trigger it would start spinning and putting balls in front of an air nozzle. When they passed in front of the nozzle, air would ome out and propel the balls. You ould load the balls by splitting the input into three streams and putting outputs onto the disc at three dfferent spots. Here's some drawings that might help me with my idea.


OK, they're not good at all. Its late, I just want a rough sketch. Well in the animation there should be more balls behind the first, the disc should be fully enclosing the ball, and when it fires you would have a nice seal. So anyway- does anyone think this is a good idea? Bad idea? Problems? Let me know.

[ScatterPlot]

Sorry about no animations/pics, but the gif thingy is kinda messed up right now. If you want them, tell me and ill try a little more in depth.

[toymyster]

Prsuming it would work, you would have the same problem rotary engines have: eficiency!! The design would be a gas hog and a half!!!

[Coaster]

yeah, show us some animations. Sounds like a neat idea.

[ScatterPlot]

Ill work on the animations a little later today, right now I have to go somewhere. Does anyone know of a good free gif animator? Thats whats holding me back. But anyway, where would the gas hoggishness come from? Would it be the fact that it was firing so much or just the design of the gun? If it was the design you could make it just the internals of an Impulse or something that doesnt use much gas. Of course we would need AGD to make a firing mechanism that could keep up, like a RT valve or something. RTs wouldnt work because they are designed to use a bolt, and a bolt would defeat the purpose of this idea. Wow, no one has really flamed my ideas (like usual!) I am amazed. Thanks and keep posting.

[Vegeta]

That is kind of how the SMG-60 and -68 worked, only there wasn't any rotation. Balls were put inside their own little shell like that of a gun, open in fornt and back. They were loaded into a clip, and into a spring fed magazine. The casings and PB's were fed into the open breech, and hte casing would seal the breech. A hammer would strike the valve, and the air would shoot hte paintball out, and hte casing would be ejected.

The hardest part would be sealing the breech and dumping the chamber of air at the same time, and also loading balls into this rotary design.

[diesel4mee]

good idea

my friendand i have been working on a similar diesign. we have the bolt vaule assem complete in cad. right now were are trying to figure out how to turn the bolt and the easy way to achive that.

[Redkey]

can you use a pneumatic ram that is linked to some kind of a saw tooth gear?

[diesel4mee]

we have a idea thanks for urs. and the wanker engine are effecent i dont no were u been 250 hp out of 1.3 l is a hell of a good ratio.

[Wat]

I think the problem of any rotary bolt system or any system that replaces the bolt/ram concept is the paint fit. Since nothing is physically pushing a ball into a breech, the fitting would have to be lose enough for gravity or air pressure to push the ball into place. Which doesn't lead to having good accuracy or efficiency. Plus, you'd probably want to build the bolt in different sizes.

[314159]

a loose rotary style breech will affect the accuracy the same as a loose breach.

i think that this would fit in the same accuracy range as all guns with a large breach.

[diesel4mee]

we already thought of that and there are going to be differnt breach size jsut like a freak but no inserts just new bolts.

[Wat]

You're going to have a loose bolt area that the ball can easily drop into and then a correctly size, snug barrel breach. Then air is going to blast the ball from the loose bolt into the tight barrel. In other guns you have a bolt pushing the ball into the breech, then air firing the ball.

Here it sounds like you'd have to use air to both push the ball into a tighter bore barrel and then propel it further. At best i think it would be bad efficiency, at worst paint breaks.

[Orange Crush]

There was already a gun similar to this once called the phoenix. It used a rotary type bolt. The bolt was a plastic cylinder with a hold drilled through it for the ball. The round side was aligned with the vertical axis of the gun. The hole would be facing up and a ball would drop in, when you pulled the trigger the cylinder would rotate forward, aligning the hole with the barrel and the valve would open and fire the ball, then it would rotate back. The design had a couple of advantages..double feed was impossible, and there was no blowby into the feed tube. Don't know what happened to it though....


Did a quick search and found this page which is interesting...has almost all patents applied for for paintball.

http://airsoldier.com/~haveblue/tech/patents/

Here is the Phoenix's patent, but you have to be a member to look at the diagrams.

http://www.delphion.com/details?pn=US05494024__

[flanders]

it's impracticle to much crap can go wrong

so many verianbles

size of the weel
alot of extra stuff that can brake