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Dual angle
http://www.motivbowling.com/forum/viewtopic.php?f=8&t=29809
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Author:  Moldyhoho [ Tue Feb 25, 2014 11:57 pm ]
Post subject:  Dual angle

If I wanted to know what angles were used to drill my ball how would I work backwards with the ball already punched. What lines need to be drawn and from where? Thanks

Eugene

Author:  jt_shanks [ Thu Feb 27, 2014 12:57 pm ]
Post subject:  Re: Dual angle

pretty good vid:

https://www.youtube.com/watch?v=Oq8SG1rqdCw

edit: helps to know your PAP

Author:  gwendel [ Tue May 20, 2014 11:37 pm ]
Post subject:  Re: Dual angle

I can do it, lets see if I can explain it.
First you need to know your PAP. If you do, then..
Draw a line with quarter scale through center of grip bridge to thumb. Then find half way point of span. I.E. 4-1/2 total span mark 2-1/4 on mid line. Draw a 90 degree line from that point to the right (for a right hander) Use your PAP over measurement and mark it. Draw a 90 degree line from over mark to create VAL. mark your Up/Down PAP. Draw a line from pin to mass bias, or on a symmetric ball pin through CG 6-3/4 mark a virtual Mass Bias. Draw a line from PAP to Pin. This should give you all the marks and angles. Just measure them.

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