Thanks Bob and Dr. Dave. Between Bob, one of my local room's regulars and a fine instructor, and Dr. Dave, the guy whose book helped me start this hobby of playing pool (I highly recommend Dr. Dave's book, FWIW, if you can handle something that reads and looks a bit like a textbook, but that's to be expected since he's a professor), these ought to be good informational videos.
Online Videos from Dr. Dave and Bob Jewett ("The Fort Collins Project")
- Thread starter dr_dave
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tip efficiency
Regards,
Dave
You're welcome.WilleeCue said:
I wouldn't expect the weight to have much (if any) effect. We did test a wide range of weights; although, we weren't specifically studying this.WilleeCue said:I have some questions about the tip re-bound videos.
Would the weight of the butt change anything?
In our tests, more rebound means less energy loss. With less energy loss, the cue can deliver more speed to the cue ball with the same effort.WilleeCue said:
Hardness isn't the only factor contributing to energy loss, but your statement is reasonable.WilleeCue said:
Probably not.WilleeCue said:
A stiffer cue material would probably result in less energy loss, but the tip losses would still be there.WilleeCue said:
You're welcome, and thanks again.WilleeCue said:
Regards,
Dave
Dave and Bob,
If I could make one point, it would be that the unseeable foul, where cue ball grazes the illegeal OB on the way through, then rebounds back into it, can happen more often when the two OBs are placed closer together.
It was hard to get that shot to occur with your ball placements but would have occured more often with closer or different angle placements.
It would be good to see a few more of these with different placements and to take note of the resultant foul OB direction. For most shots I imagine a ref could still rule the shot as a foul if it went backward of the tangent line, but not to the degree expected on a legal hit.
Colin
If I could make one point, it would be that the unseeable foul, where cue ball grazes the illegeal OB on the way through, then rebounds back into it, can happen more often when the two OBs are placed closer together.
It was hard to get that shot to occur with your ball placements but would have occured more often with closer or different angle placements.
It would be good to see a few more of these with different placements and to take note of the resultant foul OB direction. For most shots I imagine a ref could still rule the shot as a foul if it went backward of the tangent line, but not to the degree expected on a legal hit.
Colin
What sort of position did you have in mind?Colin Colenso said:
Colin Colenso said:
That's not a spin effect; it's the effect of the ball compressing the cushion farther because of the extra speed. Bob mentioned that, but here's a drawing to illustrate it:
The red lines are the path of the ball's center, not its edge. The grey ball and dotted line are there to show where the ball's center is when it's just touching the rail - to illustrate that the banked ball's center goes past that point a little as the cushion compresses.
A banked ball actually rolls along the rail a little while it's in contact with it, travelling in a curved path as the cushion compresses and uncompresses. When it's hit harder it compresses the cushion more and spends a little more time in contact with it, rolling a little farther along it before rebounding.
You can see this clearly by setting up a bank shot like Bob did (using two frozen OBs) and hitting it over and over - the ball will eventually mark a visible curved path on the cloth next to the rail.
pj
chgo
Last edited:
Herkybird
Registered
This is why!
This is why I lurk here... reading this forum nearly every day. Wading though all the soap opera, complaining about equipment, I got ripped off on the internet, and I got the newest custom thingamabob that does everything but grate cheese just to find the little crumb of information that will actually broaden my skills and possibly improve my game. :thumbup: The fouette shot is the gem of the month for me. :thumbup: Shot this repeatedly today and it absolutly made my afternoon. Thanks Dr. Dave and Bob for making the time I spent on here worthwhile. Rant over as I slink back into the darkness waiting for my next crumb. :grin: :grin: :grin:
This is why I lurk here... reading this forum nearly every day. Wading though all the soap opera, complaining about equipment, I got ripped off on the internet, and I got the newest custom thingamabob that does everything but grate cheese just to find the little crumb of information that will actually broaden my skills and possibly improve my game. :thumbup: The fouette shot is the gem of the month for me. :thumbup: Shot this repeatedly today and it absolutly made my afternoon. Thanks Dr. Dave and Bob for making the time I spent on here worthwhile. Rant over as I slink back into the darkness waiting for my next crumb. :grin: :grin: :grin:
Okay, first post on this so a little long. But I wanted to express my thanks for posting these clips, as always very informational. I've studied pool and 3-cushion billiards for 15+ years now, and always prided myself on reading as much as possible (not much was available when I started out), and extracting as much useful (and sometimes useless) information as I could about the game from books, matches on TV, people at the pool hall, and more recently the numerous DVD's and internet offerings available. Everything ranging from the simple basics of the game that everyone should know to "trick" type shots, the physics behind the game, systems, etc.
I rarely run into people that enjoy this information like I do, or want to discuss it, or have taken the time to read 75+ books, listen to countless hours of commentary, etc. looking for the next little gem. However, I could always count on and looked forward to Bob's (and Robert Byrne's) articles in BD and discussions on RSB, and now I include Dr Dave in that category - there are obviously others as well, but your passion for the game and the study of it comes through loud and clear in your videos and discussions. Thanks to both of you, and others that do this, for sharing the information and debunking long standing myths - you can't argue with the high speed video... I learn something from every group of videos you post, and that's saying something...
This last batch, I love the reinforcement of the which ball was hit first concept, something that causes arguments frequently that are easily avoided. Wish more people understood this simple information, and now they will! I also loved the fouette shot - didn't remember (or didn't know) what it was called, but I use the concept for certain close up extreme draw stroke shots in pool and billiards - Semih Sayginer is a master at this shot. You can easily draw the ball a table length, more if you have a good stroke, from 1/4" away from the object ball using this technique without fouling. And I learned something new with the 10 times system - I knew the 2 times system, but always have guessed for the other type of shot.
Well, enough rambling. Again, thanks for the vids and discussions/articles over the years, look forward to more!!!
Scott
I rarely run into people that enjoy this information like I do, or want to discuss it, or have taken the time to read 75+ books, listen to countless hours of commentary, etc. looking for the next little gem. However, I could always count on and looked forward to Bob's (and Robert Byrne's) articles in BD and discussions on RSB, and now I include Dr Dave in that category - there are obviously others as well, but your passion for the game and the study of it comes through loud and clear in your videos and discussions. Thanks to both of you, and others that do this, for sharing the information and debunking long standing myths - you can't argue with the high speed video... I learn something from every group of videos you post, and that's saying something...
This last batch, I love the reinforcement of the which ball was hit first concept, something that causes arguments frequently that are easily avoided. Wish more people understood this simple information, and now they will! I also loved the fouette shot - didn't remember (or didn't know) what it was called, but I use the concept for certain close up extreme draw stroke shots in pool and billiards - Semih Sayginer is a master at this shot. You can easily draw the ball a table length, more if you have a good stroke, from 1/4" away from the object ball using this technique without fouling. And I learned something new with the 10 times system - I knew the 2 times system, but always have guessed for the other type of shot.
Well, enough rambling. Again, thanks for the vids and discussions/articles over the years, look forward to more!!!
Scott
I wish every league player could see these
As a referee I often explain that there are several ways to tell when a foul occurs.
The shot itself is clearly visible, sometimes the sound(In the case of miscue or a close in rail shot), but very often it's the path/action of the cue ball or object balls.
Some of these videos (Or ones like this) are shown to referees in training and I think players should get to watch them as well.
This is good stuff Bob & Dr. Dave :thumbup:
As a referee I often explain that there are several ways to tell when a foul occurs.
The shot itself is clearly visible, sometimes the sound(In the case of miscue or a close in rail shot), but very often it's the path/action of the cue ball or object balls.
Some of these videos (Or ones like this) are shown to referees in training and I think players should get to watch them as well.
This is good stuff Bob & Dr. Dave :thumbup:
videos are work, but worth it
Scott,
Thank you for the message. It takes lots of time and effort to create the videos; but knowing that people appreciate the work makes it easier to get motivated to do more. I'll do my best to try to get Bob to fly out again soon. I also hope to do more sessions with Tom Ross and maybe others.
Regards,
Dave
Scott,
Thank you for the message. It takes lots of time and effort to create the videos; but knowing that people appreciate the work makes it easier to get motivated to do more. I'll do my best to try to get Bob to fly out again soon. I also hope to do more sessions with Tom Ross and maybe others.
Regards,
Dave
scottjen26 said:Okay, first post on this so a little long. But I wanted to express my thanks for posting these clips, as always very informational. I've studied pool and 3-cushion billiards for 15+ years now, and always prided myself on reading as much as possible (not much was available when I started out), and extracting as much useful (and sometimes useless) information as I could about the game from books, matches on TV, people at the pool hall, and more recently the numerous DVD's and internet offerings available. Everything ranging from the simple basics of the game that everyone should know to "trick" type shots, the physics behind the game, systems, etc.
I rarely run into people that enjoy this information like I do, or want to discuss it, or have taken the time to read 75+ books, listen to countless hours of commentary, etc. looking for the next little gem. However, I could always count on and looked forward to Bob's (and Robert Byrne's) articles in BD and discussions on RSB, and now I include Dr Dave in that category - there are obviously others as well, but your passion for the game and the study of it comes through loud and clear in your videos and discussions. Thanks to both of you, and others that do this, for sharing the information and debunking long standing myths - you can't argue with the high speed video... I learn something from every group of videos you post, and that's saying something...
This last batch, I love the reinforcement of the which ball was hit first concept, something that causes arguments frequently that are easily avoided. Wish more people understood this simple information, and now they will! I also loved the fouette shot - didn't remember (or didn't know) what it was called, but I use the concept for certain close up extreme draw stroke shots in pool and billiards - Semih Sayginer is a master at this shot. You can easily draw the ball a table length, more if you have a good stroke, from 1/4" away from the object ball using this technique without fouling. And I learned something new with the 10 times system - I knew the 2 times system, but always have guessed for the other type of shot.
Well, enough rambling. Again, thanks for the vids and discussions/articles over the years, look forward to more!!!
Scott
pool knowledge resource
If you have several days to kill, I think there is a lot of good stuff there.
Also, if you or others have suggestions on material to add, please let me know.
Regards,
Dave
I'm the same way. I also like documenting everything I find and learn. FYI, every time I see, read, or write something I think is important or I want to remember, I usually add a summary, links, or quotes here:scottjen26 said:
If you have several days to kill, I think there is a lot of good stuff there.
Also, if you or others have suggestions on material to add, please let me know.
Regards,
Dave
ne14tennis said:
Every league player could see them. If the leagues would talk to Dave then perhaps the videos he makes freely available to us could be packaged on a disk and given to every league player. An idea is to distribute them far and wide - each an advertisement for better understanding of pool. It need not be a profit seeking venture but it wouldn't hurt for these fine gentlemen to be compensated for the time they volunteered.
Great vids! I already own Dr Dave's book and these are a great addition to a already great website. Like others I found the fouette to be of great interest since I usually jack up my cue or aim at a angle in this situation. One concern for me is that in APA my opponent will have a 3rd party watch almost everytime I attempt a fouette shot and I fear they will call a foul mostly based on the stroke and distance from the cue and object ball. Maybe I will wait to some others in my APA league know this shot
double hit detection and avoidance
I wish all league players could watch and understand this video. There would probably be a lot less arguing.
Regards,
Dave
What some people need to learn is how to judge hits like this based on the motion of the cue ball. I think the following video is even more useful in this regard:TheNewSharkster said:Great vids! I already own Dr Dave's book and these are a great addition to a already great website. Like others I found the fouette to be of great interest since I usually jack up my cue or aim at a angle in this situation. One concern for me is that in APA my opponent will have a 3rd party watch almost everytime I attempt a fouette shot and I fear they will call a foul mostly based on the stroke and distance from the cue and object ball. Maybe I will wait to some others in my APA league know this shot
I wish all league players could watch and understand this video. There would probably be a lot less arguing.
Regards,
Dave