Author Topic: If bal holes change core dynamics, then what about thumb holes? (Read 657 times)

RevZiLLa · « **on:** March 15, 2008, 04:02:38 AM »

I think we are all agreed that balance hole location can change RG and therefore also RG Diff of a ball. Are we forgetting that thumbholes are as big as balance holes...sometimes bigger...and that they too can affect core dynamics?

If you drill a ball pin up above the fingers, where will the thumbhole take mass out of the core? What about if you drill it pin down instead?

Now I'm no expert here, but I'm pretty sure that my cavernous thumbhole placement makes a diference. (1 3/8 by 3 1/2) Can someone help educate on this?
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RevZ=======================

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the pooh · « **Reply #1 on:** March 15, 2008, 01:24:10 PM »

You may have answered your own question.On a pin below fingers,the thumb hole takes off the side of the core ,increasing differential(thus increasing flare and hook).On pin above,it takes off the bottom of the core, decreasing differential(decreasing flare and hook).At least this is the way it's supposed to work in theory.

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the pooh

Author Topic: If bal holes change core dynamics, then what about thumb holes? (Read 657 times)

RevZiLLa

If bal holes change core dynamics, then what about thumb holes?

the pooh

Re: If bal holes change core dynamics, then what about thumb holes?