How to Curve an Object Ball

[dr_dave]

FYI, I just posted a new video that presents a challenge or proposition shot that clearly proves that an object ball (OB) can be swerved using topspin and backspin, especially if there is significant throw due to cling/skid/kick. I also use the technique to beat an old OB Swerve Challenge from Bob Jewett. I also demonstrate an OB jump shot and a little "pool magic" trickery. Check it out:

Contents (with timestamp links):
0:00 - Intro
0:52 - The Challenge
3:12 - Bending the OB to the Pocket
4:23 - Jumping the OB Instead
5:15 - Using “Pool Magic” Instead
6:40 - Wrap Up

As always, I look forward to your feedback, comments, questions, complaints, and requests.

Enjoy!

 

[sjm]

Enjoyed that, Dave. Thanks.

 

[dr_dave]

Enjoyed that, Dave. Thanks.

I'm glad you liked it Stu.

Thanks for the feedback.

 

[justnum]

There is good sense of presentation in that video.

 

[dr_dave]

There is good sense of presentation in that video.

Thank you. I am always trying to improve my presentation style, while still trying to provide good content.

 

[justadub]

Waiting for Cleary to duplicate it

 

[Patrick Johnson]

Cool stuff, Dave! And looking forward to your updates on collecting from Bob... have you considered BCA certification?

pj
chgo

 

[Patrick Johnson]

3:12 - Bending the OB to the Pocket

It's interesting to me that you need follow on the CB to get the bend - I suppose that's to have downward motion on the CB contact point as it hits the OB (to create masse rotation)?

Did you discover an optimum cut angle? Frame-by-frame viewing shows a bigger overcut at contact than I expected.

pj
chgo

 

[dr_dave]

Waiting for Cleary to duplicate it

I'm sure he can do a much more convincing job at it than me.

 

[dr_dave]

Cool stuff, Dave! And looking forward to your updates on collecting from Bob...

Show me the money!

 

[dr_dave]

It's interesting to me that you need follow on the CB to get the bend - I suppose that's to have downward motion on the CB contact point as it hits the OB (to create masse rotation)?

Bingo. Because of the thrown OB direction, the transferred bottom spin to the OB has a masse component. FYI, the physics and math are here if you are interested:

TP A.24 – The effects of follow and draw on throw, and OB swerve​

Did you discover an optimum cut angle? Frame-by-frame viewing shows a bigger overcut at contact than I expected.

Remember, I have chalk at the contact point so there is cling/skid/kick, and the effect is larger with a larger cut angle (see the bottom of TP A.14 and TP A.17). I used close to a 45 degree cut in the video to get a strong cling effect without needing to use too much speed (which reduces throw and cling).

 

[TATE]

FYI, I just posted a new video that presents a challenge or proposition shot that clearly proves that an object ball (OB) can be swerved using topspin and backspin, especially if there is significant throw due to cling/skid/kick. I also use the technique to beat an old OB Swerve Challenge from Bob Jewett. I also demonstrate an OB jump shot and a little "pool magic" trickery. Check it out:

Contents (with timestamp links):
0:00 - Intro
0:52 - The Challenge
3:12 - Bending the OB to the Pocket
4:23 - Jumping the OB Instead
5:15 - Using “Pool Magic” Instead
6:40 - Wrap Up

As always, I look forward to your feedback, comments, questions, complaints, and requests.

Enjoy!

Wow, I would have bet against that!

 

[Poolmanis]

Cool vid again Dave! I knew this was possible long time..
One day I was wondering if you would combine slight jump to hit ob could it make effect even larger?

 

[buckshotshoey]

I think we need to stop calling you Doctor..... it should be Professor! Excellent video.

 

[straightline]

You can apply the jump dynamics to frozen balls too. Often times when you're faced with a forcible carom ( the draw --> follow gearing kind) but the approach angle is too shallow, a jump/ram stroke can do the trick.

 

[Masayoshi]

That happened to me a while back

 

[alphadog]

So I am not crazy after all Bob recently challenged me on the swerve in a thread. I let it go as who am I to challenge him. (Translation- too lazy to video!)

I jump object balls over blocking balls quite often. I was playing a eye dr. and jumped a 8 ball over a full blocking ball. This time the 8 jumped about a foot off the bed which is way higher then I have ever seen. The Dr. said "When you called the 8 there , I couldn't imagine what you were trying. After you jumped the 8 I am not sure I dont need my eyes checked".

 

[dr_dave]

Wow, I would have bet against that!

I think I would still bet against it if only a few attempts are allowed. The hit needs to be perfect to take advantage of the "subtle" effect, even with the cling/skid/kick from chalk on the ball (which makes aiming very tough, especially with small changes in speed).

 

[dr_dave]

Cool vid again Dave!

Thanks!

I knew this was possible long time..
One day I was wondering if you would combine slight jump to hit ob could it make effect even larger?

Jumping the OB is "cheating," and when you add speed to jump, you lose throw and spin transfer. Obviously, with a real shot, the jump is the way to go; but with the proposition/challenge shot, even a small jump would be an obvious cheat.

 

[dr_dave]

I think we need to stop calling you Doctor..... it should be Professor!

Actually, I am a retired "Professor" (mechanical engineering). I am also a "Founding Professor" and "Dean" of the Billiard University.

Excellent video.

Thanks.