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Author Topic: CG near the Thumb....OK?  (Read 15606 times)

TheGom

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CG near the Thumb....OK?
« on: December 24, 2014, 01:37:52 PM »
Looking go do a Pin Down drilling with a ball that has a  3.5" pin, but with my shorter span of 4", a pin down drilling will put the CG in or near the center of my thumb. Is this an issue?

Is this ball best to drill pin up or look for a 2" pin for a pin down drilling?
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kidlost2000

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Re: CG near the Thumb....OK?
« Reply #1 on: December 24, 2014, 01:49:18 PM »
Not an issue at all. I would kick the CG out towards your pap a little bit to help distribute some of the weight and add a weight hole as needed.

If the top weight is low you can probably get away with drilling the thumb a little deeper and keeping the fingers a little shallow and not need a weight hole at all.

Just double check the static weight before drilling.
« Last Edit: December 24, 2014, 01:51:08 PM by kidlost2000 »
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TheGom

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Re: CG near the Thumb....OK?
« Reply #2 on: December 24, 2014, 01:55:57 PM »
Quote from: kidlost2000 on December 24, 2014, 01:49:18 PM
Not an issue at all. I would kick the CG out towards your pap a little bit to help distribute some of the weight and add a weight hole as needed.

If the top weight is low you can probably get away with drilling the thumb a little deeper and keeping the fingers a little shallow and not need a weight hole at all.

Just double check the static weight before drilling.

Thanks, so a 60 x 4.5 x 70 type of drilling.....Pap is 4 1/8 up 5/8 Tilt 17-19 Rota 55-70
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kidlost2000

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Re: CG near the Thumb....OK?
« Reply #3 on: December 24, 2014, 02:13:50 PM »
Should work just fine and give options for adding a weight hole as needed.
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billdozer

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Re: CG near the Thumb....OK?
« Reply #4 on: December 24, 2014, 03:12:10 PM »
My best flaring ball had the cg by the thumb.  That sucker was baaaad. 

Roto Grip Cell.  I'll post a pic 8)
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JustRico

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Re: CG near the Thumb....OK?
« Reply #5 on: December 24, 2014, 03:44:10 PM »
The CG is created by a minuscule shift of the core from the true center of the mass thus a 1" pin out is created by a 1/32" shift
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kidlost2000

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Re: CG near the Thumb....OK?
« Reply #6 on: December 24, 2014, 08:16:39 PM »
So the CG is.....never mind. You be the glutton of punishment I will stick with what was already stated.

Merry Christmas and good luck with the new ball.
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TheGom

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Re: CG near the Thumb....OK?
« Reply #7 on: December 24, 2014, 08:51:11 PM »
I also laid it out 5 x 4 x 3 and like the looks of this as per Roto's site

For me, 49 x 5 x 43....pin above middle finger.

Will talk to my driller and go from there.

Thanks for the info.

Merry Christmas to all
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JustRico

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Re: CG near the Thumb....OK?
« Reply #8 on: December 24, 2014, 08:55:47 PM »
Quit worrying about the pin to CG distance and be more concerned abt enhancing the desired reaction with the pin to pap distance
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TheGom

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Re: CG near the Thumb....OK?
« Reply #9 on: December 24, 2014, 09:31:44 PM »
Quote from: JustRico on December 24, 2014, 08:55:47 PM
Quit worrying about the pin to CG distance and be more concerned abt enhancing the desired reaction with the pin to pap distance

No worrying...learning from people like you...now I know and yes, pin to pap is very important as I have never had a 5" before in a Symm ball and since I am struggling on a fresh ripping pattern and even more crazy as the the games go on, maybe a more mellow pin placement will be the ticket.
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kidlost2000

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Re: CG near the Thumb....OK?
« Reply #10 on: December 24, 2014, 09:51:38 PM »
What ball are you drilling?
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TheGom

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Re: CG near the Thumb....OK?
« Reply #11 on: December 24, 2014, 10:04:22 PM »
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kidlost2000

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Re: CG near the Thumb....OK?
« Reply #12 on: December 24, 2014, 10:19:31 PM »
For medium to lighter oil?
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JustRico

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Re: CG near the Thumb....OK?
« Reply #13 on: December 24, 2014, 10:43:11 PM »
You need to understand how you play or attack the lanes...what angles you like to play
If you're straighter go with a 5" pin to pap to get your line in front of you
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TheGom

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Re: CG near the Thumb....OK?
« Reply #14 on: December 24, 2014, 11:22:36 PM »
I have asked for the pattern but know one seems to know.

What I have heard is that AMF Syn are higher friction then other Syn and mainly in the heads. Been told 39-40 feet. I would say more on the lighter side of Medium for sure. At times it looks like everyone can hook it off the lane and at times there is OB. Shot seems to be up the 10-13 boards. High and tight seems to carry the best. I leave a lot of 4 pins, and 10 pins as do many and I have trouble stringing strikes together. I get better as the shot breaks down but most will excel in game 2 and struggle game 3. Speed is good there. I am about 16.5 at release.

Been finally doing better with a pin down Vibe XR the last few sets. Teammate has been doing well with a Uproar....style like mine and the ball is drilled like the Pin up that I mentioned. Lots of energy at the pins. I have a bit more tilt then him though.

Thanks
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