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Author Topic: I need some info on topweight  (Read 2394 times)

MelvinBrunsTrack

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I need some info on topweight
« on: November 07, 2006, 04:38:44 AM »
Can someone send me some info on topweight.

Thank you
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shelley

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Re: I need some info on topweight
« Reply #1 on: November 07, 2006, 12:58:53 PM »
Search for the FAQ post, I believe it's covered there.

Basically, starting top weight is how much heavier the top half of the ball is than the bottom half.  If you put the CG at the north pole and cut at the equator, the top half would be TW heavier.  Higher tops generally go longer and have more backend than lower tops.

SH
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MI 2 AZ

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Re: I need some info on topweight
« Reply #2 on: November 07, 2006, 02:55:31 PM »
http://www.bowlingfans.com/jeff/ballreactionbasics.html
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Edited on 11/7/2006 3:50 PM
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T-GOD

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Re: I need some info on topweight
« Reply #3 on: November 07, 2006, 03:19:59 PM »
Kuly, if you have a ball starting with 4 oz. top and another with 1 oz of top, both drilled centered on the label, pin in the same position on each, the one with 1 oz. starting top will end with bottom weight and will react very differently than the one starting with 4 oz. top..!! =:^D
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BrunsNick

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Re: I need some info on topweight
« Reply #4 on: November 07, 2006, 03:23:18 PM »
Once again, I disagree with T-GOD.


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shelley

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Re: I need some info on topweight
« Reply #5 on: November 07, 2006, 03:52:24 PM »
quote:
Pounds vs oz. there is no match.


Take the lead weights off the wheels of your car if you believe that.  Static weights become dynamic when you impart spin to the ball.

SH
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BrunsNick

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Re: I need some info on topweight
« Reply #6 on: November 07, 2006, 03:58:20 PM »
Wasn't aware that tires flared!
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BrunsNick

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Re: I need some info on topweight
« Reply #7 on: November 07, 2006, 04:07:20 PM »
www.brunswickbowling.com/uploads/vids/CG_demo_5-05.wmv
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Strapper_Squared

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Re: I need some info on topweight
« Reply #8 on: November 07, 2006, 04:20:08 PM »
quote:

Take the lead weights off the wheels of your car if you believe that.  Static weights become dynamic when you impart spin to the ball.


Totally different comparison... but even so,

At what speed do you feel drastically out of balance tires?

30 mph?  maybe 40 mph?


Making an assumption of tire size (diameter is 25 inches):

30 mph = 400 rpms
40 mph = 530 rpms

Based on this, the only people that may see an effect from a drastic imbalance are people with rev rates over 400 rpms...

Again, this is only IF (and a big if) imbalance in a car tire acurately describes imbalance in a bowling ball (That just sounds rediculous typing it... LOL).


Top weight.  Its purpose to to keep equipment within USBC limits after drilling holes (i.e. removing weight from the top of the ball).  If the cg is shifted, it determines where and how large of a weight hole is necessary to make the ball legal within USBC limits.  Otherwise, it has an exceedingly small to no effect on ball reaction (IMO).

S^2

S^2
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shelley

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Re: I need some info on topweight
« Reply #9 on: November 07, 2006, 04:25:45 PM »
quote:
Based on this, the only people that may see an effect from a drastic imbalance are people with rev rates over 400 rpms...


That doesn't take into account the fact that the weights on a tire are measured in grams while the tire's weight may 30#.  Side weight in a bowling ball is a much, much larger fraction of the overall weight.

SH
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StormTechDept

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Re: I need some info on topweight
« Reply #10 on: November 07, 2006, 04:44:52 PM »
quote:
Based on this, the only people that may see an effect from a drastic imbalance are people with rev rates over 400 rpms...  
quote:



Tell that to a little kid, throwing a plasitc ball, 6lbs at 5 mph and 1 ounce of sideweight(Illegal) or even 1/2 ounce side (legal). Even if they throw the ball with 0 degree's tilt and 0 degree's rotation, that ball will take off! I would say the lighter the ball, the slower you throw it, the more difference you'll see.
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Strapper_Squared

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Re: I need some info on topweight
« Reply #11 on: November 07, 2006, 05:14:03 PM »
Taken from bowlingball.com:

quote:

We have done CATS testing on the ball's overall reaction with different static weights and the results showed no measurable difference of ball reaction. There were far greater reaction differences involved by the bowler's inconsistency of ball speed, rev rate, axis rotation and tilt. The greatest reaction differences came when altering the surface friction of the coverstock.


So we have Brunswick that states statics have no influence and made a video demonstrating it.  We have tests from bb.com stating that statics have no measurable effect and have CATS data to back up their claim.  Yet you keep insisting that statics have an influence on ball reaction.  Ante up your proof.  Do the math..make the video..whatever it takes..give us some proof.  Hit us with some scientific data (by the way, "I think.." or "for me it makes a difference" doesn't cut it)...

S^2
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Joe Theismann idiot quote of the week:
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Like there is any other kind of statue?



Edited on 11/7/2006 6:06 PM
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Djarum

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Re: I need some info on topweight
« Reply #12 on: November 08, 2006, 09:03:29 PM »
quote:
Taken from bowlingball.com:

quote:

We have done CATS testing on the ball's overall reaction with different static weights and the results showed no measurable difference of ball reaction. There were far greater reaction differences involved by the bowler's inconsistency of ball speed, rev rate, axis rotation and tilt. The greatest reaction differences came when altering the surface friction of the coverstock.


So we have Brunswick that states statics have no influence and made a video demonstrating it.  We have tests from bb.com stating that statics have no measurable effect and have CATS data to back up their claim.  Yet you keep insisting that statics have an influence on ball reaction.  Ante up your proof.  Do the math..make the video..whatever it takes..give us some proof.  Hit us with some scientific data (by the way, "I think.." or "for me it makes a difference" doesn't cut it)...

S^2
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Joe Theismann idiot quote of the week:
"He's a standing statue."
Like there is any other kind of statue?



Edited on 11/7/2006 6:06 PM


I have two questions if it doesn't make a difference.

1) Why do I see pros have two identical balls with identical surfaces with different drills where the pin distance was exactly the same, but the static weight was different?

2) I have seen it change a balls reaction first hand for dry lanes. I had a friend drill up a pure hammer with a 4" pin to pap with a good bit of thumb weight. The ball died too early. He drilled another one up with just short of a 4" pin to pap with 3/4 once finger weight, and it went about 3 feet longer.

I think it does play an effect the more friction you have.

Dj
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The views and opinions of Djarum expressed on BallReviews.com do not necessarily state or reflect those of the BallReviews.com.
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T-GOD

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Re: I need some info on topweight
« Reply #13 on: November 09, 2006, 11:38:09 AM »
BrunsNick, once again, YOU'RE WRONG..!!

You can see a difference in ball reaction when you place balance holes in it. The same hold true for differences in top weight/statics/ending CG whatever you want to call it.

Physics is physics. If the ending heavy spot of the ball is different, whether a balance hole is used or not, the ball will react differently..!! It may be minimal to your eyes or others eyes, or it may be enough that you can see the difference, but in either case, there WILL BE A DIFFERENCE.

If you're not good enough to see the difference, that's OK. But don't try to tell others that there is no difference when we can see it. Even if it's minimal, like a 2-5%, I'll take the advantage everytime. =:^D
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KMAN300

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Re: I need some info on topweight
« Reply #14 on: November 09, 2006, 11:57:39 AM »
I tend to agree with T-GOD aswell It just seems to be more common sense rather than just Physics.
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