# File:01DualAngleSweetSpot.pdf

01DualAngleSweetSpot.pdf(file size: 45 KB, MIME type: application/pdf)

 UPDATE 10-12-10: I have made a few small changes to the first couple pages and have removed the bowler samples from the PDF file. I will get new more accurate bowler samples / layouts into the PDF as soon as I can. - MattInTheHat
 UPDATE 8-16-10: I am working on updating this guide to replace some of the bowler examples, clean up some of the information that isn't quite right, and add some more information that I hope will help clarify some things. Please bare with me as it may take a little while to get this done. - MattInTheHat

The attached file is a reference guide to help in deciding a bowlers "sweet spot" and to assist in the application of the Morich Dual Angle System. Includes a compilation of information from the BowlingChat forums / wiki, Mo's brain (among others!), plus sample bowlers of various types with the recommended sweet spot, ratio, and layouts.

PLEASE NOTE: this reference is only a guide. There are many variables that come into play when deciding on angle sums, ratios, pin to PAP distances, etc, and it is nearly impossible to break down all of those variables into clear cut bullet points. The bowler examples included in the PDF are valuable examples of real and accurate recommended sweet spots and layouts for a given type of bowler. Be sure to make use of these examples by comparing your specs to those in the PDF for further guidance in determining your sweet spot and benchmark layout.

The following is the first page and a half of the guide for quick reference:

## Angle Sum Variance:

• ± 30° for elite bowlers
• ± 20° for good bowlers
• ± 10° for average bowlers

## Determine the Sum of angles by analyzing bowler's ball speed & rev rate.

• Rev Dominant use higher angle sums – start around 120°
• Speed Dominant use smaller angle sums – start around 80°
• Speed = Revs use medium angle sums – start around 100°

## Drilling Angle, Sum of Angles, & Ratio Adjustments

• Make adjustments based on bowler specs that are extremes
• Normal Axis Rotation: 30° - 60°.......Normal Axis Tilt: 13° - 15°

• Use lower drilling angles for high Axis Rotation
• (this may reduce the ratio & sum of angles)

• Use lower ratios for high Axis Rotation in conjunction with low Axis Tilt
• (helps smooth out breakpoint)

• Lower drilling sum slightly for high Axis Tilt
• Lower drilling sum more for high Axis Tilt & high Axis Rotation
• (helps ball get into transition quicker - similar to speed dominant bowler)

## Adjust the angles for the pattern the bowler wants to use the ball on.

• Dry or short patterns use higher ratio
• Wet or long patterns use lower ratio

## Roll the ball, then use balance holes to fine tune reaction

• For a more aggressive coverstock ball use larger angle sum layouts
• For a less aggressive coverstock ball use smaller angle sum layouts

If the ball design creates a later, sharp break point, use lower ratio (lower drilling angle to VAL).
If the ball design creates a sooner, forward rolling ball, use more ratio (higher drilling angle to VAL)

High tilt players use Pin to PAP distances of 4 1/2" to 5 3/4" (with Asymmetrical balls)

• 4 ½” Pin to PAP distance will make the ball come off the spot hard (more angular)
• 5 ¾” Pin to PAP distance will make the ball roll forward sooner

Asymmetrical Balls exhibit most flare at Pin to PAP distances of 2 3/4" to 6 1/4"
Symmetrical Balls exhibit most flare with Pin to PAP distances of 3 to 4"

Retaining Axis Rotation & Axis Tilt (increase skid, reduce flare):

• To retain Axis Rotation and Axis Tilt in SYMMETRICAL equipment, we would tend towards longer pin-pap (> 4") distances, while ASYMMETRICAL equipment we use shorter pin-pap distances (< 3"). We would also chose higher angle ratios (2:1 - 3:1) to promote a longer first transition to make the most of what Axis Rotation and Axis Tilt is available at release.

Burning Off Axis Rotation & Axis Tilt (decrease skid, increase flare):

• To burn off Axis Rotation and Axis Tilt quicker in SYMMETRICAL equipment, we would tend toward Max flare pin positions (3" - 4"), while longer pin distances (4"+) in ASYMMETRICAL equipment. We would also chose lower angle ratios (1:1 - 1:2) to get the ball to reach the first transition sooner, while trying to eliminate jumpy back end reaction that tends to accompany high Axis Rotation and Axis Tilt.

## File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeDimensionsUserComment
current14:31, 8 March 2013 (45 KB)Mattinthehat (talk | contribs)
06:12, 4 March 2013 (45 KB)Mattinthehat (talk | contribs)
12:06, 12 October 2010 (46 KB)Mattinthehat (talk | contribs)Removed old bowler / layout examples, in the process of updating with more accurate examples.
20:05, 17 June 2010 (81 KB)MattInTheHat (talk | contribs)
11:24, 29 April 2010 (72 KB)MattInTheHat (talk | contribs)
11:22, 29 April 2010 (72 KB)MattInTheHat (talk | contribs)
09:51, 18 April 2010 (63 KB)MattInTheHat (talk | contribs)
12:21, 16 April 2010 (63 KB)MattInTheHat (talk | contribs)Reference guide to help in deciding a bowlers "sweet spot" and to assist in the application of the Morich Dual Angle System. Includes a compilation of information from the BowlingChat forums / wiki, Mo's brain, plus 10 sample bowlers of various types with
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