Smooth Twist X Barrel liner sleeved with CF?

[ackuric]

Has anyone pondered this, or am I the lone crazy guy?

Would the title of this thread be viable? I know custom work would need to be done for the barrel to fit inside other rifles and what not, but the concept/idea, could it work?

I'd imagine the liners are fairly light when compared to most peoples stock barrels, they seem really thin, and also custom twist rates just sound amazing. If one could purchase just the liner and have it sleeved with carbon fiber, the weight savings on rifles + the possible increase in velocity for some, and accuracy for others just make it seem worth asking others opinions on the possibility of this becoming a reality. I would not hesitate to have this done at almost any expense.

-Matt

[Marc In Iowa]

Seems like it ought to be possible. I do really like the notion of the smooth twist liners. Lothar Walther makes barrels for others, why not FX?

If you're interested in barrel technology, you may be interested in this video.

[skorec]

In some thread I also have mentioned the same  idea  to use  X barrel from FX (CF sleeved and tensioned too) . The main problem is that is it not ( probably will be not )  possible to buy it  separately.

Nice video.

[anti-squirrel]

I'm not keen on limiting my barrels; it has been mentioned a number of times in numerous videos the FX barrels are designed around JSBs. 

Plus I personally wouldn't want to support FX.

Now other folks?  Sure, why not- whatever helps you achieve those goals.  Could always try other barrel liners with a carbon fiber sleeve, though.

[ackuric]

Seems like it ought to be possible. I do really like the notion of the smooth twist liners. Lothar Walther makes barrels for others, why not FX?

If you're interested in barrel technology, you may be interested in this video.

Sweet vid, thanks!

-Matt

[Marc In Iowa]

... wouldn't want to support FX.

Because?

[rsterne]

Excellent video, I agree with 99.9% of what he says.... The only error I saw was the description of how the rifling is made in the Smooth Twist barrels, where he said the muzzle end was "gripped and twisted".... I watched an FX video, and the rifling is clearly pressed in over a mandrel that is a mirror image of the finished product.... The photo of the stripped pellet shot from an FX barrel confirms the very slow resulting spin from them, however, regardless of how they are made.... Nice to see someone else harping about the twist rate of most airgun barrels being too high, which causes problems at long range.... Hopefully someday, the manufacturers will take note....

TJ's liners are relatively small in OD, and benefit from sleeving with CF.... If you go too small on the steel portion of the liner.... the wall thickness may become too thin to machine a flat for the transfer port, and you may have to start working with a thimble instead....

Bob

[ackuric]

Excellent video, I agree with 99.9% of what he says.... The only error I saw was the description of how the rifling is made in the Smooth Twist barrels, where he said the muzzle end was "gripped and twisted".... I watched an FX video, and the rifling is clearly pressed in over a mandrel that is a mirror image of the finished product.... The photo of the stripped pellet shot from an FX barrel confirms the very slow resulting spin from them, however, regardless of how they are made.... Nice to see someone else harping about the twist rate of most airgun barrels being too high, which causes problems at long range.... Hopefully someday, the manufacturers will take note....

TJ's liners are relatively small in OD, and benefit from sleeving with CF.... If you go too small on the steel portion of the liner.... the wall thickness may become too thin to machine a flat for the transfer port, and you may have to start working with a thimble instead....

Bob

Excellent and noted. I would LOVE to get my hands on a 21-23" barrel with a 1:22 twist rate and sleeved with carbon. I am willing to bet the very low twist rate on fx smooth twist barrels is certainly a good reason why they do so well, especially in EBR. I've seen 100 yard groups from the FX crown @ just .5" which is 1/2 moa!

-Matt

[skorec]

I am not sure I have understood video  right but spin stabilization for pellets we need only near the muzzle
where  the pellet is effecting by not homogeny air pressure.  At these area   higher spin help more but at long distance a long of Magnuson   we  need slow spin for compensating some unbalances  of pellets only. 

[Marc In Iowa]

I am not sure I have understood video  right but spin stabilization for pellets we need only near the muzzle
where  the pellet is effecting by not homogeny air pressure.  At these area   higher spin help more but at long distance a long of Magnuson   we  need slow spin for compensating some unbalances  of pellets only.

Yes.

Because a diabolo pellet is stabilized by drag, spin is only needed right at the exit point of the barrel where exhaust air pushes against the skirt.

If the winds is at your back, it too can push on the skirt.

At long distances (over 50 yards), too much spin keeps the pellet head from changing orientation as it should to follow the trajectory curve down. If the pellet doesn't change orientation as it drops, it may tumble or spiral opening up group sizes on impact. Trying to shoot diabolo pellets at 75-100 yards has it's challenges.