# Difference between revisions of "File:01DualAngleSweetSpot.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.

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.

• 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°

## Drilling Angle / Sum Adjustments

• Adjust drilling angle lower for higher Axis Rotation (in turn reduces ratio & sum)
• Lower drilling sum for higher Axis Tilt

## 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)

• 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)

## 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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