STROKE TIMING … A Complete MythBusting Study of Stroke Acceleration Effects

So does that mean that all snooker players have been doing it right over many more years?

Actually, some of the main advantages provided by an open bridge do not apply for upright stances common in 3C. Custom and tradition probably also play a role.
See edited post #79.

I doubt if it's about a little more 'upright' stance as to more that 3C players apply more Effect to the CB in relation to the Vertical/Horizontal axis.
 
Don't play much(any??) of either game but don't 3c players use closed-bridge due to the power used for a lot of shots? What little i've played there seemed to be a lot of power shots where the security of a closed bridge helped. Hey Bill, you may not remember me but i'm the guy in Tulsa that gave you the rubber grip for your cue. You told me about Fels' articles on you and i got some from him before he passed.
 
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Don't play much(any??) of either game but don't 3c players use closed-bridge due to the power used for a lot of shots? What little i've played there seemed to be a lot of power shots where the security of a closed bridge helped. Hey Bill, you may not remember me but i'm the guy in Tulsa that gave you the rubber grip for your cue. You told me about Fels' articles on you and i got some from him before he passed.
I do remember you, thanks again. That was in 2006. In the past it would be helpful, before faster cloth and more responsive cushions we have now.

IMPO, playing rotation games in Pool the CB is struck a higher % of time with more force than in 3C. (We rarely ever contact the CB 100% full). Mostly when force is used in these games the CB is contacted 80% full or more on draw & follow shots, even on a long-distance stop shot. In 3C We're looking for the correct angles off the CB to carry the CB around the table 4,5,6 7 rails. But, with the correct quantity of OB and with the correct sidespin, this is the correct blend that makes some players game look simplified.

That's why, 'Tempo, Timing and Speed' are the core elements to a properly delivered measured stroke for each and every shot is crucial.
 
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Dear DrDave

I have a friend that wants to play pool but only has two stubs or a medical replacement.

Are there are engineers that can solve billiards for someone that has limited hand functions?

Also have a few friends that struggle with eye sight and glasses won't work, any chance someone can work on augmented vision?

How would stroke work if you don't have hands? Serious question, some hospitals go through games faster than most game users.
 
Dear DrDave

I have a friend that wants to play pool but only has two stubs or a medical replacement.

Are there are engineers that can solve billiards for someone that has limited hand functions?

Sorry, but I don't have any experience with this. The only advice I have is to check out some of the tools and techniques used by wheelchair players.


Also have a few friends that struggle with eye sight and glasses won't work, any chance someone can work on augmented vision?

I have advice to use eye glasses effectively here:

 
How far up a shaft does the impact shock wave travel before the ball has left the tip?
Depends on body mass. I’ve seen heavy people pop a rack with no ill effect at all, whereas a skinny guy’s pants would fall down
 
How far up a shaft does the impact shock wave travel before the ball has left the tip?
A search on the speed of sound in maple along the fibers gives 4110 meters per second. That gives about 2.8 cue lengths of travel in one millisecond. That means that the compression wave has time to reflect back to the tip while it is on the ball. That's required for full transfer of energy to the cue ball. The situation is complicated by what the tip is doing. For the first half of contact, it is getting more and more compressed and continues to send that added compression down the stick.

It appears that tip contact time is well matched to the length/material of the typical cue. I wonder if that was just lucky.
 
A search on the speed of sound in maple along the fibers gives 4110 meters per second. That gives about 2.8 cue lengths of travel in one millisecond. That means that the compression wave has time to reflect back to the tip while it is on the ball. That's required for full transfer of energy to the cue ball. The situation is complicated by what the tip is doing. For the first half of contact, it is getting more and more compressed and continues to send that added compression down the stick.

It appears that tip contact time is well matched to the length/material of the typical cue. I wonder if that was just lucky.

Do the reflections dissipate the wave using a finite series approximation?
Or is a better model the idealized model?

I am talking about the time parameter for the sound wave to resolve to nearly nothing.

I bring it up because the acoustic punch can impact cue movement. A piece of paper vibrates if placed close enough to a speaker. I put plants near speakers and they perk up a bit.
 
A search on the speed of sound in maple along the fibers gives 4110 meters per second. That gives about 2.8 cue lengths of travel in one millisecond. That means that the compression wave has time to reflect back to the tip while it is on the ball. That's required for full transfer of energy to the cue ball. The situation is complicated by what the tip is doing. For the first half of contact, it is getting more and more compressed and continues to send that added compression down the stick.

It appears that tip contact time is well matched to the length/material of the typical cue. I wonder if that was just lucky.

If not lucky, it probably made one material "feel" better than others along the way. I would think length has to do with the size of people, so more likely material was varied.

Your description now has me wondering about the wavelength as well.
 
... Your description now has me wondering about the wavelength as well.
There are two interesting oscillations after the ball leaves the tip. One is the transverse vibration and the other is the longitudinal. There was a video from a Russian cue maker that actually showed the longitudinal vibration at a kilohertz or two. It shows the tip vibrating forward and back along the length of the stick. The transverse oscillation (like a violin string) frequency is around 50 Hz.
 
There are two interesting oscillations after the ball leaves the tip. One is the transverse vibration and the other is the longitudinal. There was a video from a Russian cue maker that actually showed the longitudinal vibration at a kilohertz or two. It shows the tip vibrating forward and back along the length of the stick. The transverse oscillation (like a violin string) frequency is around 50 Hz.
I had to deal with filtering both of these frequencies out when designing the DigiCue.
 
I don’t remember exactly, but 50Hz and 1kHz seems about right. I used an analog accelerometer with an antialiasing filter around 100Hz so the longitudinal vibration never made it to digital. The 50Hz didn’t vary that much per player or cue, but the magnitude did. Joe Tucker, my friend and coach at the time, finished his stroke locked to his ribcage and had a huge vibration. Other players not so much.

I used a moving average filter to remove it.
 
For those interested, an open bridge solves these sorts of issues and offers many other advantages:

I agree that open bridges do offer advantages, for me, in some situations, but I'm a closed bridge guy from the get go. Made it easier to control shaft and develop my stroke when I first started playing and Stuck. Lol.
I'll use an open bridge on shots that require cue elevation I can't get w closed one and in certain short stroke hits for better aiming purposes. Other than that, no way Josè. Lol
 
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