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Author Topic: Finding the CG  (Read 2005 times)

kidlost2000

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Finding the CG
« on: January 30, 2010, 08:43:51 AM »


What do you do to locate the cg on a ball that isn't marked correctly? (using a scale)
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" men lie, women lie, numbers don''t "
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…… you can't  add a physics term to a bowling term and expect it to mean something.

 

sunsetlefty

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Re: Finding the CG
« Reply #1 on: January 30, 2010, 05:11:37 PM »
Lane 1's website has a good explanation on how to find the CG on miss-marked balls.

http://www.lane1bowling.com/tech/cg.html
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JohnP

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Re: Finding the CG
« Reply #2 on: January 30, 2010, 06:27:16 PM »
In the Lane 1 instructions they refer to their diamond label.  But the procedure will work for any manufacturer's ball.  The label reference is just to keep the rotation from step to step straight.  If you need to, just draw a facsimile of their label on the ball you're checking.  Or just remember that each rotation is a quarter turn counter clockwise.  --  JohnP
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kidlost2000

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Re: Finding the CG
« Reply #3 on: January 30, 2010, 06:32:02 PM »
quote:
I thought "CGNOMADUH"

Edited on 1/30/2010 5:58 PM


It matters when you don't know where it is.
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" men lie, women lie, numbers don't "
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…… you can't  add a physics term to a bowling term and expect it to mean something.

kidlost2000

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Re: Finding the CG
« Reply #4 on: January 30, 2010, 06:32:52 PM »
and big thanks to sun and john.
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" men lie, women lie, numbers don't "
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…… you can't  add a physics term to a bowling term and expect it to mean something.

Dogtown

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Re: Finding the CG
« Reply #5 on: February 19, 2010, 06:46:59 PM »
What if you don't where the CG is?  Brunswick is bad not to clearly mark the CG on the ball.  Sometimes X-outs are mismarked.  How do you verfy the CG location for these?
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JohnP

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Re: Finding the CG
« Reply #6 on: February 19, 2010, 08:36:17 PM »
You have to guess a location and put your first line about 1 1/2" from where you think it is.  If your guess is right you'll end up with a fairly large rectangle to draw the X in.  That will give you a better starting point to pin it down with a smaller rectangle.  If you don't get a rectangle, you missed the starting location too far and will have to guess again.  Repeat until you get it.  --  JohnP
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elgavachon

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Re: Finding the CG
« Reply #7 on: February 26, 2010, 01:01:53 PM »
I bought a ball that had the cg marked on the wrong side of the pin.We don't have a determinator, so had to assume the mass bias was wrong too and drill the ball backwards. The ball worked fine.
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