The taper part we agree on. It does have to be a drastically different taper to effect squirt. A straight taper vs. a long pro taper can have some SMALL effect, more than likely not noticeable to most, if anyone. I would also add that typically a smaller diameter shaft will deflect less, but mostly because of the reduction of end mass.
I believe, from both personal playing experience, and a very simple swing rig test. I built a very small swing rig, and a measurable difference in different hardnesses, is what I found. I haven't had time to build a more accurate swing rig, with a neutral release mechanism, and some minor tweaks to my original design. I originally built the rig to test energy transfer, but discovered I need a neutral release to be more accurate. I can show you some pics and my designs in private if you like. It was more of a personal/boredom project, that I'm really not ready to share with the rest of the forum YET.
As to quality of shaft wood, I'm no expert on milling wood, nor builder of cues. I'm not experienced in what goes into making/picking good quality wood vs. bad, but I know that better wood will transfer more energy, and that difference in energy transfer has to have an effect of some kind. Whether noticeable with the naked eye who knows. What I do know is high end builders throw away a TON of wood that is not up to their standards for a reason. Also I think there is a reason you are using laminated shafts vs traditional shafts for a reason. I believe its to make a more consistent, higher quality product, and avoid throwing out a lot of waste shaft wood, but I could be wrong. I would be interested to know the actual logic behind it. (Mostly because I like to know everything about everything. I'm always trying to learn more...)
Anyway, I also believe that you have some thoughts and experiences that probably answer the questions that you asked me about, and I would love to hear more of your input. I
Thanks,
jhanso18
Thanks for the reply.
I do already have what I believe to be the right answers to these questions. I find them to be in conflict with some of your statements, which is why I asked for more justification.
Here's my position, and it's based on the scientific and statistical information I've gathered, experienced and read over the years.
Cue ball squirt is the result of the difference between "Effective" tip end mass and the mass of the cue ball when the cue ball is struck off center. Since the cue ball mass is pretty much a constant, changing the Effective tip end mass is the only alterable component.
Tip end mass is a simple thing to measure. Basically, you take the specific gravity of the individual materials, account for the volume of each, and you can come up with the tip end mass. More importantly, you can come up with the tip end mass per inch starting at the tip end of the cue shaft. This is important.
Effective tip end mass is another story. Basically, it's the tip end mass along with a dynamic component added to it. The dynamic part comes from the added stiffness of the cue shaft and any connected mass that may be touching the portion of the cue shaft that bends during the tip to ball contact. Keep in mind that only those things that move while the tip is in contact with the ball matter. Once the cue ball leaves the tip it's on it's own.
The trouble is that many people, and I think you fall into this category, feel that the stiffness of the cue shaft plays a large enough role to be noticeable. Unfortunately it doesn't. It does make a difference, but not enough to be relevant.
So, primarily, the tip end mass is the driving factor in cue ball squirt. I mentioned that taper could make a difference, but only when it is quite a bit different. The reason for this is because, when it's quite a bit different it changes the tip end mass.
All the rest of it is pretty much just window dressing.
I've seen dozens of different cue shafts designs come and go. Many of them claim all kinds of things that have to do with taper, shaft wood, stiffness, etc. All of them have much more cue ball squirt than what you would think after listening to the creators talk about them. And they are all gone as well.
Don't get me wrong, there are some really good LD cue shafts out there. Certainly more than there used to be. But there are way more that claim to be LD than really are. Without any kind of industry standard or regulation, anyone can claim their cue shafts are LD, whether they really are or not.
So with regards to my questions. Tip end mass is pretty much where it's at. The other things do have an effect, but not enough to even notice.
Royce