# File:01DualAngleSweetSpot.pdf

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

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 10 sample bowlers of various types with Mo's recommended sweet spot and layouts.

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

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

• Revs Dominant use higher angle sums – up to 130°
• Speed Dominant use smaller angle sums – down to 60°
• Speed = Revs use medium angle sums – around 100°

## 2) Drilling Angle / Sum Adjustments

• Lower drilling angle for higher Axis Rotation on normal oil conditions
• Raise drilling angle for lower Axis Rotation on normal oil conditions

• Lower drilling sum slightly for higher Axis Tilt
• Raise drilling sum slightly for higher Axis Rotation

## 3) Determine the angle ratio by analyzing the bowler's axis rotation and tilt.

• Axis tilt over 17° use lower ratios (1:2 - 1:3) & longer Pin to PAP (over 4”)
• Axis rotation over 75° use lower ratios (1:2 - 1:3) & larger angle sums

• Axis tilt under 16° use larger ratios (2:1 - 3:1) & shorter Pin to PAP (under 4”)
• Axis rotation under 45° use higher ratios (2:1 - 3:1) & smaller angle sums

## 4) 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

• The more aggressive the cover the larger the sum of the angles
• The less aggressive the cover the smaller the sum of the angles

To increase skid / reduce flare:

• Use shorter Pin to PAP on asymmetrical balls
• Use longer Pin to PAP on symmetrical balls
• These choices help retain axis rotation and tilt longer. Also note symmetrical balls lose tilt faster than asymmetrical balls

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:

• 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.

• 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 rations (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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