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| − | == Ratio Discussion ==
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| − | Mo once told us "Determine the ratio of the angles to determine the shape of the ball motion. '''Axis rotation and axis tilt affect this decision a lot."'''
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| − | Mo more recently said " ''' Once you decide on the ratio, the rest is math".'''
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| − | Since we are all having so much trouble deciding on the ratio, we thought we would share our thoughts just to give a base to work from. Everyone '''(Please share yours also and add or correct'''''' where necessary)''' Everyone should understand this is definitely not how Mo does this. These are our current thoughts. Just an average with no specific balls in mind. '''With''' '''specific balls''' and as new balls are released, '''these numbers will change'''. We used tilt as the primary factor, probably rotation would come second, followed by speed and revs. Rotation will probably receive more emphasis than speed or revs.
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| − | == '''to obtain approximations of ratios (based off various of Mo's recommendations)''' ==
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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.'''
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| − | This is necessary ''' To accurately calculate the drilling angle and the val angle individually.'''
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| − | It is necessary to calculate this for each bowler according to individual specs. Here are some examples of approximate ratios sometimes 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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| − | | 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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| − | == '''speed/revs matched with normal rotation''' ==
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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. <u>Use the initial ratio as a base for calculations.<br /></u>
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| − | == '''speed or rev dominance''' and/or '''extreme high or low rotation''' ==
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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'''= i'''ncrease ratios'''.<br />
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| − | <u>example # 1</u>
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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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| − | <u>
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| − | example # 2</u>
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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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| − | == Further Notes ==
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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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| − | Please note: at 7*of tilt and lower, the ratios seem to get smaller. At 10* of tilt many ratios are around 2.5:1. BUT at 7*tilt with high revs, the ratios seem to be closer to 2:1
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| − | At 7* tilt with higher rotation or speed ratios seem to be closer to 1.7:1
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| − | We think this might be in part due to the higher sums and 90* cap on the drilling angle.
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| − | These are our ideas of how we are trying to get a start at finding accurate ratios. We only give them so you can have an idea of how you might develop your own ideas. DON'T DRILL ANY BALLS UNTIL YOU
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| − | HAVE BEEN APPROVED BY THE MODERATORS
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