User:Elgavachon/Sandbox

Bowler Specs Affecting Dual Angle Sweet Spot

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

Finding Your Benchmark Total Sums

STEP #1... Find 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

STEP #2...Adjust Sum For Speed/Rev Imbalance

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.

STEP #3...Adjust 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 degrees to compensate accordingly.