Rifled barrel theory

[buzzboy]

In the past I have owned two rifled barrels. A straight rifled trufilght and a spiral rifled armson. I was seeing some pretty low velocity yesterday so I looked at how a ball fit in the barrel. A few different sizes of paint were tried but none of them fit right. There were large gaps around the balls to allow blow by. I would then think that if you use a smooth bore barrel you will acheive greater efficency. Of couse because the reg won't have to be turned up so high.

With my old barrel there were less problems becase it was not ported but there still was a great deal of room for blowby.

Thoughts...ideas...true....i like doing this....goodbye

[RRfireblade]

A properly fitted ball in a rifled barrel typically seals better than in a smooth bore barrel as in a smooth bore barrel the ball typically only contacts the barrel in 2 places (seam) and in a rifled barrel it typically contacts the barrel in 4 or more places since the rifle allows for greater inconsistancy in ball diameter.

In either case however , it is an extremely minor difference and should barely show any noticable difference. My guess is that you simply had a much greater difference in ball fit in one than the other regardless of rifling or not.

[MoeMag]

Has anyone tried making a hybrid barrel?
Have a smooth back control bore that slowly goes into a rifled front? Should be fairly easy to do with all the two-piece barrels on the market... just send a front in to be rifled.

Any thoughts???

Oh yeah just in case... My IDEA!
MoeMag 3-19-2006

[JRingold]

Since we are talking "theory". What would be the effect of such a barrel?

What is the theoretical advantage?

[agd_tac1]

Fluid dynamics would prevent the ball from spinning very long after it left the barrel, so I tend to think rifling has little or no effect on accuracy. However, I'm not sure how the hybrid would affect trajectory, since the rifling would simply allow for more contact between the ball and barrel. One thing is certain, it would slow it down quite a bit more than a smooth bore.

~A.J.

[RoamingStorm]

I stiil love poison arrow barrels, they claim that the ball never touches the barrel on its way out and its the most accurate barrel I have every used

[magman007]

so its like using a .695 barrel and it is incredibly inefficient if the ball never touches the barrel? why not just shoot with no barrel?

[ThePixelGuru]

Fluid dynamics would prevent the ball from spinning very long after it left the barrel.

Gah, not this again. Flatline barrel system, people. And when TK did his barrel-spinning tests, yes, the balls were still spinning after they left the barrel.

MoeMag, interesting idea. I'd worry a little about ball breakage, but it seems like it'd be worth looking into. Sort of a "best of both designs" thing. Couple things to think about: How far should the rifling go, and how gradual should the trasition from smooth to rifled be?

Hmm... Rifled Freak tip, anyone?

[RoamingStorm]

becayse the ball rides on a small amount of air that gap between the ball and sides of the barrel

[RRfireblade]

It's be better off to start rifled and then fade into larger diameter smooth bore.... IMO.

[magman007]

becayse the ball rides on a small amount of air that gap between the ball and sides of the barrel

exactly, therefore the barrel its self is relatively useless, except for accelerating the ball. you can achieve the exact same system by using a large bore barrel. the ball will do the exact same thing. seems like you fell for the hype.

[pachytriton]

becayse the ball rides on a small amount of air that gap between the ball and sides of the barrel

No, the ball bounces around inside larger bore barrels. Most of you have probably already seen this, but if you haven't check out
http://automags.org/resource/tech/tomstech/index.shtml

[ThePixelGuru]

It's be better off to start rifled and then fade into larger diameter smooth bore.... IMO.

You think? Why? I'd personally guess smooth to rifled would work better because you'd get efficiency with a ball/bore match at the start, then the rifling would "lock" the ball into the right trajectory. Plus, the blow-by might help reduce the "pop" the ball experiences when transitioning from the moving air inside the barrel to the stationary air outside. Just speculation, though, so it's quite possible I'm wrong. What's your theory?

[Army]

Hey gang! Let's check with the big bag of reality about rifled barrels


THEY DON'T WORK

[ThePixelGuru]

Hey gang! Let's check with the big bag of reality about rifled barrels


THEY DON'T WORK

Correction: They haven't worked yet.