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Golf Grip Design:
Natural GolfBurkhart, James
Christopher, Steven
Schmidt, Andy
Thomas, Art
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Natural Golf & IUPUINatural Golf
Natural Golf Swing (Moe Norman)
100,000 Customers
Think out-of-box
Quality Products
Localized Training
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Natural Golf & IUPUIIUPUI
Leader in engineering education
Capable Senior Engineers
Current project with IUPUI FortWayne
Scientific Design
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Why a New Grip?Increase SalesNeed story to tell
Need features to sell
Meet customer desiresIncrease distance
Increase accuracy
Increase Comfort
Reduce Vibration
Reduce Slip
Reduce Torque
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BenchmarkingNo Industry DataNo Standard Testing
No Specific Engineering SpecsMeasurable Specs
Distance (Yd)
Accuracy (Ft)
Slip Resistance (G)
Vibration (Hz)
Torque (Ft. lb.)
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How to Measure?Distance traveled
Accuracy from the pin
Vibration test
Slip Resistance
Torque
Weight Verification
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Distance & AccuracyThree identical clubs
Three different gripsOne Natural Golf Expert
Laser and Tape Measure
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VibrationFixture & Layout
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Dont Slip (Dry or
Wet)Fixture & Layout
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TorqueAnalysis & Formula
T = F*rperpendicular
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Improvement GridBenchmarks
EngineeringRequirement
DirectionofImprovemen
t
UnitofMeasure
Lamkin(Buster)
Scuti(BigLite)
Enlow
NaturalGolf(Palm
Grip)
DesignTarget
Distance Traveled = Yards 114 111 n/a 115 110+
Distance from Pin = Feet 19 24 n/a 20 20-
Vibration < Hz 0.0093 0.006 n/a 0.008 0.006-
Torque* < In-Lb 36.4 47.7 n/a 39.9 50.0+
Weight =Industry
StandardD3 E0 n/a D2 D1 or D2
Slip Resistance (Dry) > Grams n/a 339 180.5 281 300+
Slip Resistance (Wet) > Grams n/a 175.5 156.5 175 175+
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Constraints to
CreativityUSGA Rules
Cant be shorter than 7
Cant have bulges or waist
Cant have ribs or indentationsgreater than .04
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Experts OpinionRealistic Improvements
Reduce Vibration
Reduce Slip
Reduce Torque
Guaranteed Sustainment
Distance
Accuracy
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Materials to be
TestedMaterial Hardness Density (g/cm3)
Silicone 60A 1.34
Polyurethane (High-Density)
60A 1.32
Polyurethane (Low-
Density)
40A 1.26
Neoprene 75A 1.29
Nitrile, Buna-N 75A 1.26
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Results (Vibration)Able to reduce to nearly 500 Hzwith Low-Density Polyurethane
Material Frequency (Hz)
Silicone 1167
Polyurethane (High-Density) 633
Polyurethane (Low-Density) 533
Neoprene 1267
Nitrile, Buna-N 1633
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Results (Slip
Resistance)Low-Density Polyurethane
Demonstrated Best Results
Silicone Low-Density
Polyurethane
High-Density
Polyurethane
Nitrile
(Buna-N)
Neoprene
Dry (g) Wet
(g)
Dry (g) Wet
(g)
Dry (g) Wet
(g)
Dry (g) Wet
(g)
Dry (g) Wet
(g)1
171 153 200 145 80 79 125 102 170 122
2170 157 210 135 85 81 120 108 168 124
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Results (Torque)Oversized Design ReducesTorque from the Shaft by
Over 60%
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ResultsBenchmarks
Engineering
Requirement
Directionof
Improvement
UnitofMeasure
Lamkin(Buster)
Scuti(BigLite)
Enlow
NaturalGolf(Palm
Grip)
DesignTarget
ExpectedResults
Distance
Traveled> Yard 114 111 n/a 115 110+ 110
Distance from
Pin> Feet 19 24 n/a 20 20- 20
Vibration < Hz 667 767 n/a 867 600- 533-
Torque < % (In-Lb) 36.4 47.7 n/a 39.9 50.0+ 61.2
Weight = IndustryStandard
D3 E0 n/a D2 D1 or D2 D1 or D2
Slip Resistance
(Dry)> Grams n/a 339 180.5 281 300+ 205++
Slip Resistance
(Wet)> Grams n/a 175.5 156.5 175 175+ 140++
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Final Design
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Questions?
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