Transcription

The Truth aboutDrilledBowling Ballsand why theyreact the waythey do 2010 Mo Pinel

AProduction 2010 Mo Pinel

presenter 2010 Mo Pinel

Understanding Ball MotionThree Phases of Ball MotionROLL Least ball speed Most hitting power Maximum rev rate Axis rotation & tilt Least axis rotation are minimal and equalHOOK Less ball speed Force created by the More rev raterev rate exceeds the Less axis rotation force created by theball speedMaximumrev rateHookForce fromspeed forcefrom revsSKID Highest Ball Speed Force created by the ball Lowest Rev Ratespeed exceeds the force Maximum Axis Rotation created by the rev rate 2010 Mo PinelRollSkid

GRAPHICALANALYSIS 2010 Mo Pinel

USBC Ball Motion StudyData provided by 23 sensor Super CATS laneY mx b (linear)Y 2axnd2 bx csttransition1 transitionY -mx b (linear) 2010 Mo PinelRollHookSkid

Explaining the Phases of Ball MotionSample Equations30y 0.0139x2 - 0.8702x 23.331R2 0.9983y -0.2298x 15.823R2 0.995y 0.8662x - 29.686'11'-25' Ball AR2 0.9962Distance from Right Gutter (in)2520The hook region or the regionwere friction is encounteredand the ball goes from going inthe negative direction to goingtowards the pins.25'-53' Ball A53'-60' Ball A15The skid regionor the region of10ball motionwhere the ballhas not5encounteredenough frictionto beginits hook00regionLinear ('11'-25' Ball A)The roll region wherethe ball rolls on aconstant path in regardsto linearityndSKIDHOOK1st trans.Poly. (25'-53' Ball A)2 trans.Linear (53'-60' Ball A)10203040Distance Downlane (ft) 2010 Mo 2008USBCPinelROLL506070

The Effects of Cores andCoverstocks on Ball MotionThis transition is dominated bythe mass properties of thedrilled ball.The length of the hook zone isdetermined by the spin timeof the drilled ball.This transition is dominated bythe surface roughness of thecoverstock. 2010 Mo Pinel{RollHookSkid

SYMMETRICALorASYMMETRICAL 2010 Mo Pinel

Definition of an Asymmetrical BallAn asymmetrical ball must displaytwo characteristics. They are:1. It must have a PSA.2. It must have an intermediate differential.All bowling balls that have a PSA andan intermediate differential mustbe asymmetrical by definition. 2010 Mo Pinel

Definition of a Symmetrical BallA symmetrical ball does nothave a PSA and has nointermediate differential.All bowling balls that have no PSA andno intermediate differential mustbe symmetrical by definition. 2010 Mo Pinel

All drilledbowling ballshave a PSA andanintermediatedifferential. 2010 Mo Pinel

Therefore, there is nosuch thing as a drilledsymmetrical ball bydefinition.All drilled ballsareasymmetrical! 2010 Mo Pinel

Drilled bowlingballs havedifferent degrees ofasymmetry,but they are ALLasymmetrical. 2010 Mo Pinel

Drilled Brunswick MineraliteSerial # VL290Manufactured in 1948Y axisLow RG axis 2.710”Int. diff. .010”Total diff. .015”The drilledball isasymmetricalby definition! 2010 Mo PinelZ axisX axis

Mass Properties of a Bowling BallThe mass properties measure the dynamic motionpotential of a bowling ball.The mass properties we are concerned with arethe values of the low RG axis, the high RG axis,and the intermediate RG axis.Using these values will allow us to calculate thetotal differential and the intermediatedifferential of the ball. 2010 Mo Pinel

Necessary Mass Properties Specs.It is necessary to specify three of the mass propertiesto define the dynamic potential of a bowling ball.The three mass properties necessary are:1. The RG of the low RG axis2. The intermediate differential3. The total differentialThe RG of the high RG axis the RG of thelow RG axis the total differentialThe RG of the int. RG axis the RG of thehigh RG axis - the int. differential 2010 Mo Pinel

Which RG really matters? Is it the LOW RG axis? Is it the HIGH RG axis? Is it the INTERMEDIATE RG axis? Is that of the drilled or undrilled ball? Is it the RG of the PAP? Obviouslyof the drilled ball! 2010 Mo Pinel

TheANSWER The RG of the PAP The RG value of the PAPremains the same throughoutthe entire axis migration ofthe drilled ball. 2010 Mo Pinel

Essential Elements to scoring1. Proper executionduring the delivery.2. Determine the shapeof the ball motion thatwill score.3. Let the lane tell youwhere to put your feet. 2010 Mo Pinel

Factors affecting the reactionof drilled Bowling Balls1. Coverstock (chemical compositionand surface texture) 2010 Mo Pinel

a BetterUnderstanding ofCoverstocks andSurface Preparation 2010 Mo Pinel

Most Significant Variables – 18 Point Scale 2010Pinel 2008 MoUSBCcoverstockvariables

Understanding RaRa is defined as the heightof the micro-spikes of thecoverstock when it ismeasured scientifically. 2010 Mo Pinel

Surface Roughness Ra - 18 Samples(Range of Balls on Market)160.0140.0Ra Values120.0100.0Data courtesy of on Finish 2010 Mo 2008USBCPinelData courtesy of L21RS22LB23OB24RG25AE26RV27

How Surface Changes affect RaRa – Average Surface TestSurface Roughness µinches11010090807060504030201001803605001000 1000 2000 2000 4000 ishw/polishBall Surface 2010 Mo 2008USBCPinelData courtesy of USBC

Surface TextureWet sanded with 320 to 400 grit paperScuffed with a good burgundy padSanded with 600 grit paperScuffed with a grey padWet sanded with 1000 grit paperWet sanded with 2000 grit paperWet sanded with 4000 grit paperPolished with compoundPolished with ball polishPolished with ball polishcontaining a slip agent 2010 Mo Pinelearliestbreakpointlatestbreakpoint

Factors affecting the reactionof drilled Bowling Balls1. Coverstock (chemical compositionand surface texture)2. Ratio of Intermediate Differential toTotal Differential (int. diff./total diff.)of the drilled ball 2010 Mo Pinel

Differential RatioThe differential ratiois defined asintermediatedifferential divided bythe total differential(Int. Diff. / Total Diff.) 2010 Mo Pinel

the Effect of Diff. RatioAn indicator of the sharpness of thebreak point. The larger the diff. ratio,the sharper the break point.Diff. Ratios .25 yield a smoother, morecontinuous, break point.Diff. Ratios of .25 to .45 yield a mediumbreak point.Diff. Ratios .45 yield sharper, more angularbreak points. 2010 Mo Pinel

2010 Mo Pinel

RG contoursare all the pointson the surface ofthe ball thathave the sameRG value. 2010 Mo Pinel

RG contours are importantbecause the migrating PAPwill follow the RG contour asthe ball flares. That meansthat the RG of the PAP willremain the same during theball’s entire path down thelane. The bowler will dictatethe initial PAP, but the RGcontour of the ball dictatesthe path of the migrating axis. 2010 Mo Pinel

RG Contourof aSymmetricalBall 2010 Mo Pinel

Diff Ratio 0.00 2010 Mo 2009USBCPinel

RG ContoursofAsymmetricalBalls 2010 Mo Pinel

Diff Ratio 0.30 2010 Mo 2009USBCPinel

Diff Ratio 0.50 2010 Mo 2009USBCPinel

Diff Ratio 0.65 2010 Mo 2009USBCPinel

RG Contour Comparison 2010 Mo 2009USBCPinel

a study ofAxisMigrationPaths 2010 Mo Pinel

the RG of the Migrating PAPRemember, the RG ofthe Migrating PAPremains the sameduring the entiremigration of thePAP. 2010 Mo Pinel

The shape of the axismigration path results fromthe differential ratio ofthe drilled ball.The length of the axismigration path results fromthe total differential ofthe drilled ball. 2010 Mo Pinel

Factors affecting the reactionof drilled Bowling Balls1. Coverstock (chemical compositionand surface texture)2. Ratio of Intermediate Differential toTotal Differential (int. diff./total diff.)of the drilled ball3. Total Differential of the drilled ball 2010 Mo Pinel

Symmetrical 10x4.25x20 BAL P4Un-Drilled Mass PropertiesM 15.25 lbsDrilled MassPropertiesLow RG 2.501M 14.83 lbsInt Diff .000Low RG 2.502Total Diff .050Int Diff .012Diff Ratio 0.00Total Diff .066TW 2.61 oz.Diff Ratio .18RG of PAP 2.544Pin Out 4.51 in.PAP atReleasePAP atPins 2010 Mo PinelPAP atBreakpoint

FRENZY 10x4.25x20 BAL P4Un-Drilled Mass PropertiesM 15.25 lbsDrilled MassPropertiesLow RG 2.527M 14.85 lbsInt Diff .010Low RG 2.528Total Diff .045Int Diff .020Diff Ratio 0.22Total Diff .061TW 2.19 oz.Diff Ratio .33RG of PAP 2.567Pin Out 3.47 in.PAP atReleasePAP atPins 2010 Mo PinelPAP atBreakpoint

Mojave 10x4.25x20 BAL P4Un-Drilled Mass PropertiesM 15.19 lbsDrilled MassPropertiesLow RG 2.619M 14.81 lbsInt Diff .008Low RG 2.619Total Diff .032Int Diff .017Diff Ratio 0.25Total Diff .046TW 2.58 oz.Diff Ratio .38RG of PAP 2.647Pin Out 3.10 in.PAP atReleasePAP atPins 2010 Mo PinelPAP atBreakpoint

N’sane Lev RG 10x4.25x20 BAL P4Un-Drilled Mass PropertiesM 15.25 lbsDrilled MassPropertiesLow RG 2.489M 14.87 lbsInt Diff .034Low RG 2.491Total Diff .052Int Diff .044Diff Ratio 0.66Total Diff .066TW 3.25 oz.Diff Ratio .66RG of PAP 2.529Pin Out 3.18 in.PAP atReleasePAP atPins 2010 Mo PinelPAP atBreakpoint

Combo Ball 10x4.25x20 BAL P4Color CodeN’sane BlueMojave OrangeFrenzy PurpleSymmetrical Green 2010 Mo PinelPAP atRelease

Mass Properties of Drilled Balls SummaryBallMass Low(lbs) RGIntDiffTotalDiffDiff RG ofRatio PAP‘Nsane trical14.832.502.012.066.182.544Drilling: 10 X 4.25” x 20 with a P4 hole 2010 Mo Pinel

By choosing a drillingtechnique, the location andthe size of the balancehole, a ball driller can nowreduce the strength of thedrilled ball’s reaction by asmuch as 29% or increase itby as much as 55% usingcurrent USBC specifications. 2010 Mo Pinel

To learn about more abouteffective drilling techniques,read “Dual Angle Layoutswith Gradient Line BalanceHole Placements” atwww.morichbowling.com, orvisit forum.bowlingchat.netwhere all the issues of bowlingtechnology are discussed on adaily basis, especially the “Moand Friends” forum. 2010 Mo Pinel

2010 Mo Pinel

Drilled MoRich LevRGs 2010 Mo PinelNameSerialDrilling TechniqueLow RG AxisLevRG18310 x 3 3/8" x 20 .04990 x 3 3/8" x 20 2.4840.0340.04921690 x 4 1/2" x 70 2.4830.0340.05019850 x 5" x 45 2.4810.0340.053NameSerialDrilling TechniqueAfter DrillingRG ofthe PAPTopSideFingerLevRG18312 x 3 5/8" x 17 2.514-0.750.750.675LevRG13878 x 2 1/4" x 3 2.496-0.75-0.250.75LevRG21690 x 2 3/8" x 70 2.488-0.500.50-0.375LevRG19850 x 5" x 45 2.5090.3750.6250.50

Drilled MoRich LevRGsNameSerialDrilling TechniqueAfter DrillingSum oftheAnglesLevRG18312 x 3 5/8" x 17 292.5142541160.017732.120.1309LevRG13878 x 2 1/4" x 3 812.4962943140.016234.100.1175LevRG21690 x 2 3/8" x 70 1602.4882949200.016534.560.1194LevRG19850 x 5" x 45 952.5092747200.015331.950.1133 2010 Mo PinelRG ointFrictionalEfficiency

Factors affecting the reactionof drilled Bowling Balls1. Coverstock (chemical compositionand surface texture)2. Ratio of Intermediate Differential toTotal Differential (int. diff./total diff.)of the drilled ball3. Total Differential of the drilled ball4. RG of the PAP 2010 Mo Pinel

Ball surface, RGs, and thetotal differential, have similareffects on ball motion. They willall affect the rate at which theball transitions. Differentialratio has the greatest effect onthe shape of the ball motion.Pin to PAP distance affectsthe rate that the ball transitionsby affecting flare, as well as theshape of the ball motion. 2010 Mo Pinel

The SPIN TIME of the Drilled BallThe spin time of the drilled ballmeasures the complexrelationship between the ratio ofintermediate diff. to the totaldiff.,thetotal diff., andthe RG of the PAP. 2010 Mo Pinel

60 Degree Spin Time 2010 Mo PinelClickto replay video

Learn how toaccurately analyzebowling balls foryourself by usingthe “USBC BallAnalysis Form”at bowl.com. 2010 Mo Pinel

IBPSIA AdvancedHOTS is held annuallyin conjunction withBOWL EXPO. Formore info about thisand others educationalclasses contact IBPSIA. 2010 Mo Pinel

for attendingMOandAll the people at MoRich! 2010 Mo Pinel