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Author Topic: low rg and high diff question...  (Read 58045 times)

lefty50

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low rg and high diff question...
« on: July 07, 2015, 06:38:18 PM »
current specs.. Left hand, 250 rev, 16.5 off the hand, high axis rotation.

the following is primarily, but not totally, a med-hvy oil and up scenario question.

Several years ago I was told by members on this forum whom I trust that with my style of bowling (low rev, high rotation), I would always want a low RG high differential ball. That did and still does make sense to me since my favorite ball at the time was a storm Special Agent. I've always done well with high diff symmetrical balls, which makes sense. Any ball with a high RG lopes down the lane too long and never gets into a roll. Low differential ball are pretty much the same.

It seems to me that these days the vast majority of balls are higher RG and lower differential, but yet they are advertised as big hook balls, which flies in the face of what my style encounters in real life. The answer is either that they are no longer making the type of ball I prefer (few exceptions) or that the cover stock is so dramatically different that I no longer have the low RG high differential qualification requirement.

I should add that I have had nothing but trouble with asymmetric and will only buy symmetric from now on. I know that there are few balls out there like the Motiv Covert Revolt, but there are many others I would like to try based on their rating to give me some help in the rev department, but I just can't see a .047 or so low rg ball revving enough for me.

Which is true?
Thanks in advance

 

JustRico

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Re: low rg and high diff question...
« Reply #121 on: July 21, 2015, 04:01:53 PM »
It's one of those situations that if the bowler didn't know they wouldn't know...
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bergman

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Re: low rg and high diff question...
« Reply #122 on: July 21, 2015, 04:17:38 PM »
Measuring MOI is indeed, very predictable, whether the rotating mass is close to
its axis of rotation or if it is some distance away from it. The differential "number"
(.048, .060, etc.) matters not in determining MOI. It has more effect on a ball's ability to flare (precess) . For MOI, what matters is the weight of the imbalance coupled with its distance from the axis of rotation.

There are other factors related to a rotating bowling ball such as its angular velocity and torque, and although related, they alone, do not determine a ball's ability to rev up MOI does this perfectly.

bergman

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Re: low rg and high diff question...
« Reply #123 on: July 21, 2015, 04:18:56 PM »
Justrico-- lol. Agreed! 

JustRico

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Re: low rg and high diff question...
« Reply #124 on: July 21, 2015, 04:21:05 PM »
Very similar to if each bowling ball was a dark solid color they couldn't tell the difference especially on a house shot
Co-author of BowlTec's END GAMES ~ A Bowler's COMPLETE Guide to Bowling; Head Games ~ the MENTAL approach to bowling (and sports) & (r)eVolve
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kidlost2000

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Re: low rg and high diff question...
« Reply #125 on: July 21, 2015, 05:07:44 PM »
It's one of those situations that if the bowler didn't know they wouldn't know...

Core pictures and numbers are there to try and sell bowling balls to people who have no idea what they mean.  No different then putting drill sheets in the box. Both are bad ideas,  and common practice.

If a manufacturer tells me a ball is designed for dry lanes I'm not going to look at the core numbers and argue it isn't  and pick another ball. Same for the other way around.
…… you can't  add a physics term to a bowling term and expect it to mean something.

JustRico

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Re: low rg and high diff question...
« Reply #126 on: July 21, 2015, 05:20:51 PM »
Too many assume everything is absolute or competed in a vacuum...this is why surface is responsible for 70-75% of reaction...if surface doesn't match up properly then 'your' core numbers are irrelevant...more non-strikes are caused by inconsistency of the bowler plus improper surface
Co-author of BowlTec's END GAMES ~ A Bowler's COMPLETE Guide to Bowling; Head Games ~ the MENTAL approach to bowling (and sports) & (r)eVolve
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BradleyInIrving

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Re: low rg and high diff question...
« Reply #127 on: July 21, 2015, 05:37:06 PM »
^^^ bingo ^^^

MI 2 AZ

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Re: low rg and high diff question...
« Reply #128 on: July 21, 2015, 06:03:01 PM »
^^^ bingo ^^^

I need to play with the same numbers you guys do.  :)

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Brickguy221

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Re: low rg and high diff question...
« Reply #129 on: July 21, 2015, 09:47:43 PM »
Will all of you people please hold up for a few minutes as I ran out of popcorn and need to go get some more.  ;D
"Whenever I feel the urge to exercise I lie down until the feeling passes away"

BradleyInIrving

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Re: low rg and high diff question...
« Reply #130 on: July 22, 2015, 03:25:55 PM »
Let's regroup here........

Higher rg balls "tend" to go longer before going into a roll....
Now do you know why ball companies put higher rg cores into those bowling balls now?
THEY WOULD HOOKOUT at your feet w/ the coverstock on them that are made today..
You put a lower rg (I loved 2.44 to 2.46 cores but they were pearl coverstocks from 15yrs ago) into a coverstock like today it would rollout at the arrows..

kidlost2000

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Re: low rg and high diff question...
« Reply #131 on: July 22, 2015, 04:23:48 PM »
Surface.

Ball manufactures design bowling balls and tell you the intended purpose. Doesn't matter what the core is,  if they say its their heavy oil ball its all factored in. If you "can't" use a ball because of a core then don't.
…… you can't  add a physics term to a bowling term and expect it to mean something.