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| − | == Ratio Discussion ==
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| − | Here is how I think Mo chooses benchmarks:
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| − | Choose the pin to pap distance to determine resulting flare.
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| − | Determine the sum of angles to determine distance of 2nd transition. (ball speed and rev rate ratio is the main factor)
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| − | Determine ratio of angles to determine the shap of ball motion (axis tilt and rotation affect decision a lot)
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| − | Balance hole
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| − | surface
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| − | Mo says "Ratio of angles are mainly a function of axis tilt and axis rotation with tilt being somewhat more important than rotation. The bigger the ratio (3:1), the later and sharper the break point and the better it works for low tilt players (<12* of axis tilt). Conversely the smaller the ratio (1:2), the earlier and more forward rolling the break point and the better it works from high tilt players (>19* of axis tilt). ''' Once you decide on the ratio, the rest is math".'''
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| − | After you have calculated the '''total sums''' and before you can calculate the '''benchmark''' or sweet sums, it is necessary to find the '''benchmark ratio''' to accurately calculate the drilling angle and the val angle individually.<br />
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| − | It is necessary to calculate this for each bowler according to individual specs. Here are some examples of ratios frequently used by Mo for speed/revs '''matched + normal''' rotation.<br />
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| − | {| class="wikitable", border="2"
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| − | |-
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| − | ! Tilt
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| − | ! Initial Ratio
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| − | ! Ratio Range
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| − |
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| − | !
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| − | !3
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| − | | 2:1
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| − | | Range
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| − | |-
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| − | !7.
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| − | | 2:1
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| − | | Range
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| − | |-
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| − | !10
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| − | | 2.5:1
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| − | | 3:1 to 2:1
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| − | |-
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| − | !12.5
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| − | | 2:1
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| − | | Range
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| − | |-
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| − | !15
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| − | | 1.5:1
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| − | | 2:1 to 1:1
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| − | |-
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| − | !17.5
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| − | | 1.25:1
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| − | | Range
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| − | |-
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| − | !20
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| − | | 1:1
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| − | | 1.5:1 to 1:1.5
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| − | |-
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| − | !25
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| − | | 1:1.5
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| − | | Range
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| − | |-
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| − | |-
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| − | !30
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| − | | 1:2
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| − | | 1:1 to1:3
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| − | |}
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| − |
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| − | === Calculation Notes ===
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| − |
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| − | 10* tilt= 2.5:1 initial ratio with 3:1 to 2:1 initial range of ratios.<br />
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| − | 15* tilt=1.5:1 initial ratio with 2:1 to 1:1 initial range of ratios.<br />
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| − | 20* tilt=1:1 initial ratio with 1.5:1 to 1:1.5 initial range of ratios.<br />
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| − | 12 1/2* tilt= 2:1 initial ratio (example to self)<br />
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| − | 17 1/2* tilt= 1.25:1 initial ratio (example to self)<br />
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| − | If speed/revs is '''not matched''' or rotation is '''extremely''' high or low it is necessary to increase or decrease ratios in order to calculate the benchmark ratio. Use the initial ratio as a base for calculations.<br />
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| − | Higher speed dominance and/or extreme high rotation=decrease ratios.<br />
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| − | Higher rev dominance and/or extreme low rotation= increase ratios.<br />
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| − | example # 1:
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| − | 20* tilt with very speed dominant and/or high rotation, the initial ratio would have been 1:1. The '''new adjusted benchmark ratio''' will be 1:1.5 with a new ratio range 1:1 to 1:2 (range is an example only). <br />
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| − | You could go wider to include more layout options for a wider range of conditions, higher or lower depending on amount of dominance.<br />
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| − | example # 2:
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| − | 20* tilt with very rev dominant and/or low rotation, the initial ratio would have been 1:1. The '''new adjusted benchmark ratio''' will be 1.5:1 with a new ratio range of 2:1 to 1:1(range is an example only). <br />
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| − | You could go wider to include more layout options for a wider range of conditions, higher or lower depending on amount of dominance.<br /><br />
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| − |
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| − | == Further Notes ==
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| − |
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| − | These ratios need to be calculated according to amount of speed dominance or rev dominance and/or excessive high rotation or excessive low rotation. you need a correct ratio to utilize in conjunction with your total sums to accurately calculate your sweet sums. Your adjusted ratio range would be used with the +or- total sums to calculate long pattern and short pattern layouts. Mo frequently uses the lower ratio range for control drillings for easy conditions or wet/dry. He frequently uses the higher ratio range for more challenging conditions.
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| − | The amount you increase or decrease ratios would depend on each individual bowlers specs and the ability of the ball driller to accurately interpret them.
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| − |
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| − | Please note: at 7*of tilt and lower, the ratios seem to get smaller. At 10* of tilt average ratios are 2.5:1. BUT at 7* high revs is closer to 2:1
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| − | at 7* tilt high rotation or speed is closer to 1.7:1
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