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A Catalog of Common SCRATCHES, and How to Avoid Them

F
Bob Jewett said:
Yes, it is rolling smoothly for the cross-side scratch, but the cue ball is hit well above center. See the graphic inset. To me, "center ball" means with neither side spin nor follow/draw.
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That's what I am talking about Bob. No follow, no draw, no side spin - center ball.

Again would the cue ball be rolling smoothly with a center ball strike in Dr Dave's video at the 10:35 mark?
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straightline: "Can you provide the logic behind this?"

Island Drive
Island Drive said:
A. ... But if I hit that shot to come back/forth lets say five rails, or at least 4, and hit the Same Spot you hit.... the ball/collision naturally overcuts. ...
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Bob below is your response.

B. ''I don't think so. It's easy enough to test with a pair of frozen object balls and shooting the first thin and hard into the second. You seem to be predicting "negative throw".


Here's our beginning discussion of the situation.
When you said, I don't think so.
That surprised me why?
Because that was an Opinion not a fact.
I stated/Collision naturally overcuts more with high speed, why because I know it's a fact.
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Cue building Literature

J
SSDiver2112 said:
www.cuesmith.com

The Cue Building Book: From Tree, To Tip, To Trade Show! Fifth Edition. - Cue Man Billiard Products

By: Chris Hightower This is the most extensive book on cue building written to date. As the title suggests, it takes you through the complete cue building process from the sawmill, to the finished cue, to marketing your cues. It covers many things that the videos don’t. However, it is said that...
www.cuesmith.com www.cuesmith.com
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Book good but there are videos out there River of wood guy?? can't remember Deichman maybe??
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straightline: "Can you provide the logic behind this?"

S
Island Drive said:
Bob.... this is a fact.
Hitting the same contact point on a cut shot at a high speed.... INCREASES the CUTTING of THE object BALL.
Excessive spin combined with excessive cb speed Maximizes this situation.
I've very surprised but happy this came up why?
I might learn something new.
I learned when I started playing good in 70's I HAD TO aim ALLOT fatter on cut shots and even more when added draw while using ALLOT of speed. It becomes a feel shot, and conditions have a strong influence on your contact point choice.
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CB is airborne in a high speed hit. Thinner cut so it's not the same contact.

The high impact blows through the normal reaction window creating only directional force. This would probably normalize on an infinite playing surface.
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