DUAL ANGLE LAYOUT TECHNIQUE™ - Core Comparisons (Asymmetrical/Symmetrical)
Asymmetrical Core
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Symmetrical Core
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For a ball with an asymmetrical core, the drilling angle measures the angle between the line drawn from the pin to the preferred spin axis (PSA) of the ball and the line drawn from the pin through the PAP.
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For a ball with a symmetrical core, the drilling angle measures the angle between a line drawn from the pin through the center of gravity (cg) and the line drawn from the pin through the PAP.
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The pin on both types of balls is the low RG axis of the ball. The reason the drilling is different for both type of balls is that a ball with symmetrical core does not have a PSA before drilling. A ball with an asymmetrical core does have a PSA before drilling which allows the driller to draw the line from the pin to the actual PSA of the ball. The drilling angle has been used by some manufacturers to identify drilling techniques for some time now. Lou Marquez of Turbo 2-n-1™ Grips has identified a drilling technique using both the drilling angle and what he calls the "secondary" angle to the VAL.
DUAL ANGLE LAYOUT TECHNIQUE™
1 - Introduction to Dual Angle Layouts
2 - Core Comparisons (Asymmetrical/Symmetrical)
3 - Reasons for Drilling Angles
4 - Pin/PAP Distance Information
5 - Track Flare Information
6 - Reasons for Angle to VAL
7 - Layout Method (Part One)
8 - Layout Method (Part Two)
9 - Layout Method (Part Three)
