HSV B.26 - overspin with a follow shot

[mihailofsx]

So this proves that overspin really occurs when a follow shot is taken and that it really affects the motion of the cue ball after the contact with the object ball.

[DrDaveBilliards]

Yes ... "after contact with the object ball." But many people think it occurs commonly before contact with the object ball. This is not the case.

Dr. Dave

[kvidmaster]

@mihailofsx What I see is that the ball overspins *only* at the instant of contact, because you can clearly see that by the end of the video, the ball has natural roll again.

[bushputz]

The cue ball has a diameter of 2.25 inches, and a circumference of 7.069 inches.

You should try this again with a longer piece of tape, marked at 7.069 inch intervals.

If you are achieving overspin, the mark on the cue ball will be at the bottom of the ball before it reaches the first interval mark.

[DrDaveBilliards]

That's a great idea!

I don't think it would miss the mark by much. As the video shows, the amount of overspin is very slight, and it probably dissipates very quickly (i.e., roll sets in quickly).

Thanks for the idea,

Dr. Dave

[liebspeck]

Excellent video!

[DrDaveBilliards]

Thanks,

Dr. Dave

[matilda5000]

nice work. It proves overspin is possible to achieve on cue contact even if its only slight. awesome vid

[DrDaveBilliards]

... possible, but probably not that important.

Thanks,

Dr. Dave

[DrDaveBilliards]

I'm author of the book "The Illustrated Principles of Pool and Billiards," and I'm an instructional columnist for Billiards Digest magazine. I'm also a mechanical engineering professor (so I'm a scientist of sorts).

Dr. Dave