You and the other posters might be right. A lower squirt shaft, however, does produce a higher spin/speed ratio. If you put the same speed on the cueball with two different cues, the lower squirt one will get you more spin. There is no question about this. A hypothetical zero-squirt cue could produce a nearly 12 percent increase in spin/speed ratio at large tip offsets over a normal one.suckershot said:...And let me say also that I agree with everyone above that says a Predator shaft does not generate more spin. Actually, while not having any real data to back this up, I might say that if anything, a Predator shaft probably generates less spin. This was agreed with by players I know who are much better than myself, in their opinions. I say it because in my short time with my new cue, when I have shot extreme spin shots, I saw much more dramatic spin and angles off cushions than I ever saw with my Predator.
It would be quite an achievement if he managed to reduce squirt by the amount his numbers seem to indicate... miraculous actually. I'm not saying he hasn't, but it's highly doubtful.Snap9 said:...Interesting test equiptment........Wonder how reliable it truly is considering that the table is set on shag carpet.......And more importantly the two support legs for the TEST "MULE" MACHINE is placed on this same carpet......
I believe he's using "deflection" as a synonym for squirt. As you say, there are a few variables which his setup doesn't seem too dedicated to eliminating, namely swerve and throw. With enough cue speed, he can reduce the effects of swerve to essentially nill. But the tip offset he's using (3/16") is in a region where throw varies fairly rapidly with the angle of approach to the object ball. This may or may not explain the curious results he's getting. It's hard to tell without more details on his setup.Snap9 said:Now deflection is the amount of deviation of the shaft upon impact with the cue ball.............The only true way of testing any deflection is by slow motion video which is capable of viewing actual shaft movement/deflection upon striking the cue ball............How much a ball deviates from the target line is not a true gauge of deflection it is a variable of physics..........................Variables such as tip "traction", cloth reaction to english, throw and many more things reflect this sites DEVIATION FROM TARGET LINE TEST
I'm questioning it. I think the spin/speed ratio is based on tip offset and the force. The vector of the force would be determined at contact, not at separation. So, regardless of squirt values, given the same stick total mass and stick speed, the torque value should be the same.Jal said:A lower squirt shaft, however, does produce a higher spin/speed ratio. If you put the same speed on the cueball with two different cues, the lower squirt one will get you more spin. There is no question about this.
Jal said:You and the other posters might be right. A lower squirt shaft, however, does produce a higher spin/speed ratio. If you put the same speed on the cueball with two different cues, the lower squirt one will get you more spin. There is no question about this. A hypothetical zero-squirt cue could produce a nearly 12 percent increase in spin/speed ratio at large tip offsets over a normal one.
For the Predator line the increase isn't much, about 2-3 percent depending on which one you're looking at and using their figures for how much a normal shaft squirts. And you may not see any of this because their cues might not generate the same cueball speed at the same stick speed. They may or may not be as energy efficient.
Jim
I suppose I was asking for it.Cornerman said:I'm questioning it.
The reason I felt pretty sure about the spin/speed (and still do) is that you don't have to know any of the details of the time evolving force. The cueball ends up going in some direction and that's the average direction of the force during the collision. The greater the squirt, the more this force is pointing toward the center of the cueball, and thus less torque.Cornerman said:I think the spin/speed ratio is based on tip offset and the force. The vector of the force would be determined at contact, not at separation. So, regardless of squirt values, given the same stick total mass and stick speed, the torque value should be the same.
What parameters would lower squirt change in this collision?
Fred
I know I'm being a little rude in questioning your direct experience, but I don't think what you describe is possible, unless of course your regular cue squirts less than the Predator. In fact, the differences are so small, according to my understanding, that it would take a fairly precise test to detect the difference in the generated spin/speed ratio between them.suckershot said:Whether or not the low squirt shafts produce more spin, I don't know that it matters to me if the end result does not show me that there was more spin when I actually shoot the shot. What I know and what I can see with my eyes is that when I used the regular squirt shaft that came with my custom, when I moved toward the edge of the cue ball (equal to how I would with my Predator), I noticed wider angles off cushions and the ability to move whitey easier.
Jal said:I know I'm being a little rude in questioning your direct experience, but I don't think what you describe is possible, unless of course your regular cue squirts less than the Predator. In fact, the differences are so small, according to my understanding, that it would take a fairly precise test to detect the difference in the generated spin/speed ratio between them.
Jim
I don't think evolving force is a necessary study either. Just the initial force. Actually, for spin/speed ratio, the tip offset is the only parameter, as the force doesn't affect the ratio.Jal said:I suppose I was asking for it.
The reason I felt pretty sure about the spin/speed (and still do) is that you don't have to know any of the details of the time evolving force. The cueball ends up going in some direction and that's the average direction of the force during the collision. The greater the squirt, the more this force is pointing toward the center of the cueball, and thus less torque.
I don't think this is true. THe force "forward" is based on the entire mass of the stick plus shooter's arm, regardless of squirt characteristics. I believe the ball sees as much mass as the speed of sound through the shaft sees during the tip/ball contact time, which is all of it.Another thing which favors the lower squirt cue is that the force is also lined up more with the center of the shaft. This should help the cueball "see" more of the cue's mass.
Cornerman said:[...]
Since I see mikepage viewing these, I'd like to hear his assessment, as well as Mr. Jewett's.
Fred
blueballs said:i grew up in a small town that revolved around logging 80 years ago. they used the lake to transport logs to the lumbermill, and some became waterlogged and sunk. about 5 years ago the town built a barge with a crane on it, and started fishing the logs out. i asked what was so great about that wood that they would fish for it. i was told that it was used for instruments, and that they would pay a premium to get wood of that caliber. it must have pretty good resonance if people are making instruments out of it, and gladly paying the insanely high price.
We partly agree here but I'm not sure why you're making a distinction between the "initial force" and what comes after that. The cueball's speed and spin is determined by the entire time integral of the force over the contact period. We don't need to know the details, though, just what the force's average direction is. And the cueball's direction (squirt angle) gives us this.Cornerman said:I don't think evolving force is a necessary study either. Just the initial force. Actually, for spin/speed ratio, the tip offset is the only parameter, as the force doesn't affect the ratio.
The direction of the cueball, as you know, is due to squirt. And squirt is due to the lateral force, not the axial force. And I think spin is from the axial force, which should be the same in both cases.
I believe you're probably right here and I'm wrong (except for the shooter's arm part). While I'm not completely comfortable with the treatment, the conservation laws do show the cueball with more speed for a higher squirt stick. But I'll add the caveat that it's hard to account for all of the energy. For one thing, some of the stick's pre-impact energy gets taken up as potential energy with the bending of the stick.Cornerman said:I don't think this is true. THe force "forward" is based on the entire mass of the stick plus shooter's arm, regardless of squirt characteristics. I believe the ball sees as much mass as the speed of sound through the shaft sees during the tip/ball contact time, which is all of it.
Kelly_Guy said:My original point in what I said was skins was saying all of the new fad shafts can only go so far in improving one's game, and some of them are hype. I agreed with that.
Kelly