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Author Topic: Which one of these balls has a symmetric core?  (Read 1803 times)

thedjs

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Which one of these balls has a symmetric core?
« on: May 07, 2010, 01:48:37 AM »
Which one of the newer Ebonite balls has a symmetric core?  Some of them say they are symmetric mass bias, what ever that means.  Is the Mission symmetric or asymmetric?

Thanks for the help.
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Locke

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Re: Which one of these balls has a symmetric core?
« Reply #1 on: May 07, 2010, 09:56:10 AM »
pictures look pretty asymmetric.
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charlest

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Re: Which one of these balls has a symmetric core?
« Reply #2 on: May 07, 2010, 12:08:22 PM »
quote:
Which one of the newer Ebonite balls has a symmetric core?  Some of them say they are symmetric mass bias, what ever that means.  Is the Mission symmetric or asymmetric?

Thanks for the help.


Because a ball with a mass bias can have an asymmetric or a symmetric core IN APPEARANCE, you don't want to know if a ball is asymmetric or symmetric. YOu want to know if a ball has a core with a significant mass bias or not.

Mass bias implies the mass is not balanced throughout the core. That is, the mass or the weight is not evenly distributed within the core.

Symmetry implies or has to do with only the appearance of the core.

Bottomline is symmetric cores can have a significant mass bias.

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Balldoctor

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Re: Which one of these balls has a symmetric core?
« Reply #3 on: May 07, 2010, 06:59:31 PM »
Before drilling, asymmetrical cores have  marked mass bias, approximately
6 3/4 inches from the pin.
Symmetrical core do not show a marking.
However, just like all things in bowling, some do mark the 6 3/4 mass
and drill from there.
Ron Jr. has done many test on layouts with both.



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Balldoctor

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Re: Which one of these balls has a symmetric core?
« Reply #4 on: May 07, 2010, 07:03:30 PM »
Sorry, 2000 Red Pearl Mission comes from Hopkinsville
as an Asymmetrical cored Ball.
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charlest

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Re: Which one of these balls has a symmetric core?
« Reply #5 on: May 07, 2010, 08:44:01 PM »
quote:
Before drilling, asymmetrical cores have  marked mass bias, approximately
6 3/4 inches from the pin.
Symmetrical core do not show a marking.


Symmetric cores CAN show a marked mass bias, IF the core has a significant mass bias, as I said above.

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