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 Post subject: urethane layout advice
 Posted: Sun Dec 24, 2017 4:29 am Post Number: #1 Post
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I have an urethane super natural with a layout 30°x 3 3/4 x 30° and is OK for one or two games then start hooking too much and needs to start open the lines and don't really like that with an urethane bowling ball. I'll prefer to play straight.

I have another super natural ball undrilled, but wants to make it longer and strong back end, what kind of layout would you guys recommend ???????

PAP 4.5 over 1/2 up
425 rev
20° axis tilt
70° axis rotation
15 speed
Thanks in advance


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 Post subject: Re: urethane layout advice
 Posted: Sun Dec 24, 2017 7:08 am Post Number: #2 Post
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poloidrogo wrote:
I have an urethane super natural with a layout 30°x 3 3/4 x 30° and is OK for one or two games then start hooking too much and needs to start open the lines and don't really like that with an urethane bowling ball. I'll prefer to play straight.

I have another super natural ball undrilled, but wants to make it longer and strong back end, what kind of layout would you guys recommend ???????

PAP 4.5 over 1/2 up
425 rev
20° axis tilt
70° axis rotation
15 speed
Thanks in advance

What is the pin to Cg distance and top weight?

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PAP 4.75" up 1/2"
45* rotation
12* tilt
330 rev rate
16 mph off hand


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 Post subject: Re: urethane layout advice
 Posted: Sun Dec 24, 2017 7:30 am Post Number: #3 Post
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EricHartwell wrote:
What is the pin to Cg distance and top weight?


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 Post subject: Re: urethane layout advice
 Posted: Sun Dec 24, 2017 7:32 am Post Number: #4 Post
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HI Erick

pin distance to cg 3 3/4 and top weight 3

Thanks


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 Post subject: Re: urethane layout advice
 Posted: Sun Dec 24, 2017 5:57 pm Post Number: #5 Post
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Your existing 30°x 3 3/4 x 30° is approximately 70-3 3/4-30 without a low balance hole.

poloidrogo wrote:
I have another super natural ball undrilled, but wants to make it longer and strong back end, what kind of layout would you guys recommend ???????

You have a couple of options ...
Option one: Long and strong as compared to existing, utilize a Motion Hole with an 80-4-30 layout.

Option 2 is a weaker overall Control layout to your existing, low flare 70-5-35

Layouts do not work miracles.
You are very rev dominant and the lanes are becoming dry enough to make the ball you are rolling coverstock dominant and you refuse to move left into the oil.

Utilizing surface between the 2 will help keep the reaction from being too close to each other. Playing your existing one dull, 2000 grit, and the new one shiny, 4000+ will help.

If you continue to fight the lanes I suggest rolling plastic to stay in your comfort zone of playing straight.

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PAP 4.75" up 1/2"
45* rotation
12* tilt
330 rev rate
16 mph off hand


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 Post subject: Re: urethane layout advice
 Posted: Sun Dec 24, 2017 7:44 pm Post Number: #6 Post
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Thanks Erick for you response, I will try as you said resurface both ball and also going to try the 1st layout to see how it works for me, Most of the time always have to play deep inside, but now I try something different that's why I come up with urethane.

Thanks Again for your help Erick really appreciate !!!!!!


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 Post subject: Re: urethane layout advice
 Posted: Tue Dec 26, 2017 3:56 pm Post Number: #7 Post
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More and more bowlers are using urethane balls. Does the same sweet spot calculation apply still? Any extra factors to be aware of when laying out urethane balls?

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Adrian
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(Sep 2018)
PAP: 5 1/8 up 3/4
Speed: 15.5 mph (Kegel Specto)
Rev: 350 RPM
Axis tilt: 18-20*
Axis rotation: 60*


(Old)
PAP: 5 5/8 up 3/4
Speed: 14 mph off hand
Rev: 300 RPM
Axis tilt: 15*
Axis rotation: 60*


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 Post subject: Re: urethane layout advice
 Posted: Tue Dec 26, 2017 7:38 pm Post Number: #8 Post
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Layouts are about the core not the coverstock.

I don't see any reason to change the sweet spot calculations.

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Eric Hartwell

Right Handed
PAP 4.75" up 1/2"
45* rotation
12* tilt
330 rev rate
16 mph off hand


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 Post subject: Re: urethane layout advice
 Posted: Tue Dec 26, 2017 10:40 pm Post Number: #9 Post
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EricHartwell wrote:
Layouts are about the core not the coverstock.

I don't see any reason to change the sweet spot calculations.


I cant say I agree with that completely.
The layout system should take into account the entire bowling ball as a design.
There are adjustments for weak and strong coverstocks. Usually drill angle to compensate for length to 1st transition.
If you'd like to weaken the reaction on the next ball you can try 50 x 4.25 x 45.

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 Post subject: Re: urethane layout advice
 Posted: Wed Dec 27, 2017 5:55 pm Post Number: #10 Post
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EricHartwell wrote:
Layouts are about the core not the coverstock.

I don't see any reason to change the sweet spot calculations.

MegaMav wrote:
I cant say I agree with that completely.
The layout system should take into account the entire bowling ball as a design.
There are adjustments for weak and strong coverstocks. Usually drill angle to compensate for length to 1st transition.
If you'd like to weaken the reaction on the next ball you can try 50 x 4.25 x 45.

I could have worded that better.

The Sweetspot calculations are about the core.
Layouts, from there, can be adjusted to accommodate different coverstock characteristics.

I still don't believe there is a need to adjust the Sweetspot calculations.

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Eric Hartwell

Right Handed
PAP 4.75" up 1/2"
45* rotation
12* tilt
330 rev rate
16 mph off hand


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