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#16632 - 10/19/01 10:52 PM Dropping Weight
jyabroff Offline
Bantam

Registered: 10/02/01
Posts: 19
A/S/L: Male
Currently I am throwing a 16# ball. I have good rotation (I seem to be working moderately hard at maintaining my rate of rotation) and I am pretty good at controlling ball speed when I need to. I was wondering if any one has ever dropped ball weight? If so what were your results and why did you drop in weight? I am thinking about getting a cheap 15lb ball to try and see what my results are.

Thanks

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Legend

Registered: Fri Aug 27 2004
Posts: 10100
A/S/L: Mountain View, CA
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#16633 - 10/20/01 12:11 AM Re: Dropping Weight
Mike D. Offline
Junior Coach

Registered: 08/25/01
Posts: 46
A/S/L: Lehigh Valley, PA
I dropped from 16 to 15 and even tried 14. I liked 15 best. Dropping weight can sometimes help you to increase ball speed, have better control, get better lift. Most of the new equipment is very close in hitting power from 14-16 and should not have much impact on your ability to carry.

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#16634 - 10/23/01 07:25 AM Re: Dropping Weight
Coachrich Offline
Regional Pro Contender

Registered: 04/03/01
Posts: 569
A/S/L: Chesterland, Ohio
Jyabroff,

Curious about the physics involved in changing weight? (This may get me a negative 'hit' on my rating, but what-the-heck.)

Basiclly speaking, the ball in motion is using Kenetic Energey (K.E.) followed by the Potential Energy used to move the pins. If we increase the K.E. we increase our 'hitting power'.

K.E. equals 1/2 mass (we'll use the ball weight) times the velocity squared (we'll use MPH).

(My apoligies to any physics majors reading this):

Let's say you throw a 16 pound ball 60 feet down the lane in 2.15 seconds. That's about 19 MPH.
The Kinetic Energy would be 1/2x16x19x19 or a K.E. of 2888. <-Remember this number.

Let's lower our ball weight by 6% to 15 LBs:

1/2x15x19x19 = 2707

and again by 13% to 15 LBs:

1/2x14x19x19 = 2527

Looks like you shouldn't reduce ball weight? Look again:

If you throw that lighter ball (15 LB) 1.5 MPH faster (approximately 1/10th of a second faster):

1/2x15x20.5x20.5 = 3,152! (remeber the hitting power for the 16LB ball at 19MPH?)

Understanding that more Kinetic Energy results in more potential energy released on the pins...

Well the decision is yours.

Keep in mind that you would need to throw the ball CONSISTENTLY faster. (The WORK you generate to deliver the ball would need to be the same as the WORK to deliver the 16 LB ball.)

And we didn't even get into rotational Kinetic Energy.... nut
_________________________
Rich
http://www.muscle-memory.com/

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#16635 - 10/23/01 09:10 AM Re: Dropping Weight
jyabroff Offline
Bantam

Registered: 10/02/01
Posts: 19
A/S/L: Male
From what I understand even though the ball is of a lighter weight the hitting power is about the same or maybe a little less, do to newer materials that are being used in bowling balls today. If I was trying to switch weight about 6 - 8 years ago I think I would sacrifice pin action more so than with today equipment.

Jim

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#16636 - 10/23/01 04:56 PM Re: Dropping Weight
Idahocoach Offline
Junior Master

Registered: 04/18/01
Posts: 37
A/S/L: Boise, Idaho
Hello jyabroff,

I went from 16 to 15lbs.

My reason to change, came from an accident, where I broke my leg and arm into the wrist.

Tried going back to the 16lbs at first, just couldn't take the strain on the wrist.

Found that 15lbs was easier to handle, and my average is now higher that with a 16lb ball.

Coachrich is right, and I'll add, "its not the size, its what you do with it." Practice.

Lon

rotfl

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#16637 - 10/31/01 08:26 AM Re: Dropping Weight
jyabroff Offline
Bantam

Registered: 10/02/01
Posts: 19
A/S/L: Male
Thanks all for the information and in put. I think I am going to stick with 16lbs. I also recently hurt my shoulder and cannot turn the ball, as much I would like to. On the upside of that I have been scoring a little higher, making a lot more spares and been more consistent. This will be the second week that I plan to bowl with my shoulder but it does not hurt nearly as much as it did last week.


Jim

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