Alex Wheeler
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When you compare a straight tube with a HV most of the extra weight is on the muzzle end.
zfastmalibu said:When you compare a straight tube with a HV most of the extra weight is on the muzzle end.
4xforfun said:"If you are comparing 26" barrels, the heavier one (e.i. the fatter one) that is "normally made, will ring at a lower frequency."
Another nit pic...wouldn't the wave lengths of a shorter/stiffer tube be shorter and closer together? Wouldn't that be considered a HIGHER frequency. That is how it is in the music world, not sure about the engineering world.
CatShooter said:4xforfun said:"If you are comparing 26" barrels, the heavier one (e.i. the fatter one) that is "normally made, will ring at a lower frequency."
Another nit pic...wouldn't the wave lengths of a shorter/stiffer tube be shorter and closer together? Wouldn't that be considered a HIGHER frequency. That is how it is in the music world, not sure about the engineering world.
You missed the operative phrase... "If you are comparing 26" barrels, " The comparison is barrels that are the same 26" length - there is no shorter one.
zfastmalibu said:Man, you just love to be right.![]()
zfastmalibu said:CatShooter said:4xforfun said:"If you are comparing 26" barrels, the heavier one (e.i. the fatter one) that is "normally made, will ring at a lower frequency."
Another nit pic...wouldn't the wave lengths of a shorter/stiffer tube be shorter and closer together? Wouldn't that be considered a HIGHER frequency. That is how it is in the music world, not sure about the engineering world.
You missed the operative phrase... "If you are comparing 26" barrels, " The comparison is barrels that are the same 26" length - there is no shorter one.
Man, you just love to be right.You made a blanket statement which is just not true. "But barrels get stiffer by getting heavier" Twist it how you like, but thats not the case or how can a fluted barrel be stiffer than another barrel of same length and weight? I am done now.
CatShooter said:CPorter said:The load and bullet are like selecting different mallets to strike a bell.
Badd analogy cuz no matter what you hit the bell with, it rings with the same tone (frequency).
Same with barrels - the barrel vibrates with the same frequency unless you cut it - the reason changing the load improves things (or makes them worse) is that you change the time in the barrel, so you change the exit time in the vibration cycle.
jlow said:
What determines the width of an accuracy node?
So this is a question for the real experts. I think we have all seen groups posted on Eric’s thread. The question is what determines the width of an accuracy node? Is it the rifle, the caliber, the load, or a combination of the three?
Post your response but it would be useful if it was backed up with some data.
Good post! This is what tuners are for and is what they do, but with adjustability.brians356 said:In general, assuming the dominant component is the whipping motion of the barrel, and that a node straddles where the barrel reaches the limit of its reciprocating motion and reverses direction, I would venture to say that, all else being equal, a barrel with a larger amplitude of motion, and corresponding lower frequency of motion, will produce a "wider" node, but will also produce more vertical displacement of the groups' centers, and probably also larger groups around those centers, between the nodes.
Just my hunch, and perhaps obvious, but we're not dealing with pure sine waves here, there are always harmonics and random noise present.