Author Topic: Layouts (Read 1369 times)

jefftaker2002 · « **on:** August 10, 2007, 09:31:46 PM »

Can anyone tell me what is meant by when someone says they drilled there ball with a 4X4 or like a 2X2 layout. What do those mean, im still relativly new to bowling so sorry if it sumtin simple.
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Russell · « **Reply #1 on:** August 11, 2007, 07:09:21 AM »

The old terminology was that each number was:

Pin to PAP distance x CG to PAP distance

With the newer asymmetrical balls the meaning is:

Pin to PAP distance x Mass Bias to PAP distance

So a 5 x 3 means the pin is 5" from the PAP, and the mass bias is 3" from the PAP. If someone ever references this make sure which terminology they are using.

Hope this helps.
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Aloarjr810 · « **Reply #2 on:** August 11, 2007, 09:14:55 AM »

To my knowledge a layout listed as 4x4 or 2x2.
They are talking "Pin to PAP distance x CG to PAP distance".

I've never heard of "Pin to PAP distance x Mass Bias to PAP distance" layout before.
Not to say that its not being done.

But 2x2 layout would be impossible because the pin and mb are 6 3/4" apart.
You couldnt get a pap 2" from both the pin and mb.

Alot of the time if your talking MB placement its in the degree system.

Something like this
(Pin 4 1/2 from PAP above fingers, MB at 60 degrees)

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I did a quick search I could only find one place that talks a about a PAP x MB
That was in the USBC Marketing vs. Physics article:
"The ball was drilled in a 4 1/2" x 4" (pin X Mass Bias)"

But they might have meant CG not MB, the CG looks about 4" from the PAP also in the photo.

http://www.bowl.com/articleView.aspx?i=13372&f=1

Edited on 8/11/2007 9:58 AM

JohnP · « **Reply #3 on:** August 11, 2007, 10:33:02 AM »

For a ball with a symmetrical core, it's PAP to pin and PAP to cg. For a ball with an asymmetrical core, it's PAP to pin and PAP to mb, because the mb has more affect on the layout than the cg does. Aloarjr810 is correct that some combinations are impossible with asymmetrical cored balls, but the same is true for balls with symmetrical cores. For example, a 2 x 1 layout is impossible with a ball that has a 4" pin out. He's also correct that more manufacturers are giving their layouts for asymmetrical balls in the degree system. -- JohnP

Author Topic: Layouts (Read 1369 times)

jefftaker2002

Layouts

Russell

Re: Layouts

Aloarjr810

Re: Layouts

JohnP

Re: Layouts