win a ball from Bowling.com
« previous next »
Pages: [1]

Author Topic: Brunswick Technical question?  (Read 1888 times)

charlest

  • Hero Member
  • *****
  • Posts: 24526
Brunswick Technical question?
« on: July 10, 2005, 10:36:41 AM »
More than one apparently knowledgable person has said that the Power Groove's core has a true mass bias, and not a weak one either. Those 2 flip blocks appear to the uneducated eye to be far out enough to have more than a small amount of asymmetry. yet, Brunswick has chosen not to mark it nor to market the ball in that fashion. (Could it have been a test bed for the Classic Zone core?)

So, I ask:

Has Brunswick measured the mass bias or assymetric differential for the Power Groove? (I find it kind of hard to believe that they haven't.)

If so, can you share that information/specification with us?
--------------------
Bowling: Just like hand grenades and horse shoes, you only have to get close.
Life: Deal with what is.
Logged
"None are so blind as those who will not see."

 

charlest

  • Hero Member
  • *****
  • Posts: 24526
Re: Brunswick Technical question?
« Reply #1 on: July 10, 2005, 10:08:07 PM »
Thanks, TA.
Logged
"None are so blind as those who will not see."

charlest

  • Hero Member
  • *****
  • Posts: 24526
Re: Brunswick Technical question?
« Reply #2 on: July 12, 2005, 02:29:30 PM »
ttt.

Anyone from Brunswick technical???
--------------------
Bowling: Just like hand grenades and horse shoes, you only have to get close.
Life: Deal with what is.
Logged
"None are so blind as those who will not see."

charlest

  • Hero Member
  • *****
  • Posts: 24526
Re: Brunswick Technical question?
« Reply #3 on: July 12, 2005, 03:54:17 PM »
Bob,

Those pucks give a pretty large Rg DIfferential, about .051, which is at the larger end of the scale. In fact, it's large enough so that I believe it's inapprorpriate to talk of the PGs in terms of a pancake block - it makes them very dynamic.

However, the amount of mass bias created by those offset pucks is the question - does it take them far enough into the realm of asymmetrics to make them more than a dynamic cored ball. (That begs the philosophy of the hierarchy of cores: pancake, dynamic/symmetric, asymmetric.)
--------------------
Bowling: Just like hand grenades and horse shoes, you only have to get close.
Life: Deal with what is.
Logged
"None are so blind as those who will not see."

CoachJim

  • Hero Member
  • *****
  • Posts: 1044
Re: Brunswick Technical question?
« Reply #4 on: July 12, 2005, 04:04:14 PM »
I have a simillar question regarding this ball, I was wondering are the pucks set on one half of the ball, if so is there an identical set of pucks on the opposite side of the ball making it symetrical?

If there are only two and they are set to one side of the ball, then I agree with Charlest that there should be a measurable mass bias.
Logged

charlest

  • Hero Member
  • *****
  • Posts: 24526
Re: Brunswick Technical question?
« Reply #5 on: July 12, 2005, 04:34:15 PM »
quote:
Bob wrote: The question is still, do some asymetric characteristics have meaningful impact on balls that are not core heavy in the tradition of dense 2 piece balls.


I've never heard  that concern/idea voiced previously. I am not sure why it would or would not be applicable. I'm not saying or implying it is wrong. I don't know enough gyroscopic physics to understand either "side of the coin".
--------------------
Bowling: Just like hand grenades and horse shoes, you only have to get close.
Life: Deal with what is.
Logged
"None are so blind as those who will not see."

charlest

  • Hero Member
  • *****
  • Posts: 24526
Re: Brunswick Technical question?
« Reply #6 on: July 13, 2005, 07:55:17 AM »
quote:
I think I was a little cumbersome in how I expressed that idea.  What I wanted to say is that I think the impact of asymetrics on mass bias decreases as the cg moves toward the outer shell, thus increasing the impact of static weight.


Thanks, but I understood what you were saying. I don't understand why or why not a mass bias would have less of an effect on a higher RG or high RG ball. Maybe the mass bias differential needs to be higher (like .030?) to have an effect but I don't feel an intuitive grasp of the concept.
--------------------
Bowling: Just like hand grenades and horse shoes, you only have to get close.
Life: Deal with what is.
Logged
"None are so blind as those who will not see."
Pages: [1]
« previous next »