Symm Ball Layout

Which layout is right for me?

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deanchamp
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Symm Ball Layout

Post by deanchamp » December 9th, 2019, 10:32 am

This is a pic from the 2019 Silver manual. I must have missed something in my education about the importance of the CG placement!
Symm Ball.jpg
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EricHartwell
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Positive Axis Point: 4-3/4" and 1/2"up
Speed: 16 off hand
Rev Rate: 330
Axis Tilt: 12
Axis Rotation: 45
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Re: Symm Ball Layout

Post by EricHartwell » December 9th, 2019, 11:32 pm

USBC at its best.

Call it the placebo effect. Some bowlers will believe their ball is hooking earlier.

Just tell the customer it will hook earlier and then recommend a dull surface as well.
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PAP 4.75" up 1/2"
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12* tilt
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16 mph off hand

TonyPR
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Re: Symm Ball Layout

Post by TonyPR » December 12th, 2019, 4:30 am

Wow! I am taking my Silver next month with Del and have intentions to mark out each and every mistake like this that the manual has...
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deanchamp
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Re: Symm Ball Layout

Post by deanchamp » December 13th, 2019, 12:47 am

TonyPR wrote:
December 12th, 2019, 4:30 am
Wow! I am taking my Silver next month with Del and have intentions to mark out each and every mistake like this that the manual has...
You'll enjoy Del, but make sure you take plenty of highlighters :)
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Glenn
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Re: Symm Ball Layout

Post by Glenn » December 14th, 2019, 3:38 am

I assume this update is a result of the USBC rule change regarding balance holes.

Section 4 - Drilling Patterns and Layouts of the previous manual gave examples of layouts for symmetrically-cored balls. Even that manual had an illustration error on page 4-22. The example was for Low Pin - No Balance Hole - Smoothest Break-point layout, and, of course, the illustration showed a balance hole!

The illustration that matches yours in my previous version of the manual was Low Pin with Balance Hole - Medium Break-point. And, there was no mention of the CG in that entire chapter, but it was marked in those illustrations, too.

I don't remember any test questions involving the specifics of layouts.

Tony, my limited experience with bringing errors to the USBC's attention is that they fall on deaf ears ... just sayin'

Oh, and bring plenty of pencils and a big note pad to Del's class - he's intense (I could listen to him for hours because he's so interesting).

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Re: Symm Ball Layout

Post by TonyPR » December 14th, 2019, 5:08 am

Taking lessons with Del is super cool, took the KCMP Master of Direction course with him and Ruben giving the presentation and it’s like being in a bowling nerd’s Disneyland... The way Alex explains is pretty neat too, very ingenious and smart guy, teaches in a fun way with fewer carefully chosen words and develops some very neat gadgets.

All this is fun and trying to edit USBCs manual is a good exercise :D
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