User:Elgavachon/Sandbox

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Bowler Specs Affecting Dual Angle Sweet Spot

  • Ball speed
  • Rev rate
  • Axis tilt
  • Axis rotation

Finding Your Benchmark Total Sums

STEP #1... Find Initial Total Sums analizing Speed/Rev Relationship

Start your calculations by finding the relationship between ball speed and rev rate. An example of a well matched bowler would be 17mph speed and 300rpm (off the hand). For each 1mph increase or decrease in speed, a corresponding increase or decrease of about 50rpm would stay matched. Bowlers who are speed/revs matched would start their calculations with 95* of sums. Link Text

Rules of thumb:

  • For the first 50 revs of imbalance (in excess), add 10* to the Total Sums.
  • For the first 1 mph of speed imbalance (in excess), subtract 10* from the Total Sums.

If the speed/revs imbalance is extremely high or low, you would add or subtract extra sums to compensate accordingly. The amount of sums you add or subtract is not linear (for the second 50 revs of imbalance, you will add or subtract less than 10*, etc.)

STEP #2...Adjust Initial Sum (of step #2) for very high or very low tilt & rotation.

Mo will also lower the sum of angles for those with very high tilt & rotation, or raise the sum for those with very low tilt & rotation.

For tilt adjustments, we are using 13* to 17* of tilt as the normal tilt range.

For rotation adjustments, we are using 45* to 60* of rotation as the normal rotation range.

Rules of thumb:

  • Lower totals by about 10° for high tilt
  • Raise totals by about 10° for low tilt
  • Lower totals by about 5° for high rotation
  • Raise totals by about 5° for low rotation

If the tilt or rotation is extremely high or low, you could add or subtract extra sums to compensate accordingly.