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Author Topic: Questions for Columbia Gurus  (Read 1232 times)

seadrive

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Questions for Columbia Gurus
« on: August 13, 2004, 09:58:27 PM »
Hi guys and gals,

I was looking over the comparison spec sheets that you can view/print on C300's web site, and I noticed that, as the weight of each ball decreases from 16# to 14#, the "RG" increases (sometimes dramatically), while the Differential RG remains pretty much the same.

This is in contrast to Ebonite, which seems to favor keeping the RG constant, while allowing the Diff RG to increase, as the ball weight drops.

As an example, look at the numbers for the Detour:


16#    rg = 2.488    diff rg = 0.037
14#    rg = 2.571    diff rg = 0.036

So, while the 16# Detour would be classified as having a low RG, the 14# Detour would fall into the medium-high RG category, yes?

So... a couple of questions for you Columbia gurus.

1) What does the "RG" number on the charts represent: the min RG, the max RG, or the average of the two?

2) Is the reason for the difference between Big C and Big E that they remove the weight from different parts of the core?

3) If Columbia's RG numbers are an accurate representation of each ball's inclination to roll early or late, then do 14# Columbia balls "go longer" than the 16# version of the same ball, keeping all other things (e.g. ball speed, revs, axis tilt, etc.) constant?

TIA for your thoughts!
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seadrive
Cogito ergo bowl


Edited on 8/16/2004 11:19 AM

 

LuckyLefty

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Re: Questions for Columbia Gurus
« Reply #1 on: August 15, 2004, 08:46:32 PM »
si si Senor!

Dynamic Integrity is a word bandied about at times.

Implying the same specs between different weights of balls.

I've noticed Columbia in it's higher priced lineup keeps these stats similar but not in it's lower price lineup.

I believe that Columbias RG numbers are the low rg figure which I have always found strange that any company does that as how many actually drill their bowling balls using low rg drilling vs high rg drillings.  ie are many balls really drilled with the weightblock laying on its side OR PIN on PAP.

Of course not but many are drilled with the pin on the bridge a much more high rg drilling.

Therefore one is forced to do the math. What is the actual RG of this drilling I'm doing?

Well it is low rg plus some portion of differential added to low rg based on pin position.  Ummmmmm,  about 2.59.  Based on my 4 1/2 pin to pap!

REgards,

Luckylefty
It takes Courage to have Faith, and Faith to have Courage.

James M. McCurley, New Orleans, Louisiana

seadrive

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Re: Questions for Columbia Gurus
« Reply #2 on: August 16, 2004, 04:44:37 PM »
Thanks for chiming in, LL.

quote:

I've noticed Columbia in it's higher priced lineup keeps these stats similar but not in it's lower price lineup.


Maybe moreso, but if you look at the Throttle On and the Bully, you'll notice quite a spread between 16# and 14#.

Is it about the part of the core from which they remove the weight?
--------------------
seadrive
Cogito ergo bowl