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Golf Grip Design:Natural Golf
Burkhart, JamesChristopher, Steven
Schmidt, AndyThomas, Art
Natural Golf & IUPUINatural Golf
Natural Golf Swing (Moe Norman)
100,000 Customers
Think out-of-box
Quality Products
Localized Training
Natural Golf & IUPUIIUPUI
Leader in engineering education
Capable Senior Engineers
Current project with IUPUI Fort Wayne
Scientific Design
Why a New Grip?Increase Sales
Need story to tell
Need features to sell
Meet customer desiresIncrease distance
Increase accuracy
Increase Comfort
Reduce Vibration
Reduce Slip
Reduce Torque
BenchmarkingNo Industry DataNo Standard TestingNo Specific Engineering SpecsMeasurable Specs
Distance (Yd)
Accuracy (Ft)
Slip Resistance (G)
Vibration (Hz)
Torque (Ft. lb.)
How to Measure?Distance traveled
Accuracy from the pin
Vibration test
Slip Resistance
Torque
Weight Verification
Distance & AccuracyThree identical clubs
Three different grips
One Natural Golf Expert
Laser and Tape Measure
VibrationFixture & Layout
Don’t Slip (Dry or Wet)
Fixture & Layout
TorqueAnalysis & Formula
•T = F*rperpendicular
Improvement GridBenchmarks
Engi
neer
ing
Requ
irem
ent
Dir
ecti
on o
f Im
prov
emen
t
Uni
t of M
easu
re
Lam
kin
(Bus
ter)
Scut
i (Bi
g Li
te)
Enlo
w
Nat
ural
Gol
f (Pa
lm G
rip)
Des
ign
Targ
et
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 Standard
D3 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+
Constraints to Creativity
USGA RulesCan’t be shorter than 7”
Can’t have bulges or waist
Can’t have ribs or indentations greater than .04”
Experts OpinionRealistic Improvements
Reduce Vibration
Reduce Slip
Reduce Torque
Guaranteed SustainmentDistance
Accuracy
Materials to be Tested
Material 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
Results (Vibration)Able to reduce to nearly 500 Hz
with Low-Density PolyurethaneMaterial Frequency (Hz)Silicone 1167Polyurethane (High-Density) 633Polyurethane (Low-Density) 533Neoprene 1267Nitrile, Buna-N 1633
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
2 170 157 210 135 85 81 120 108 168 124
Results (Torque)Oversized Design Reduces
Torque from the Shaft by Over 60%
Results…Benchmarks
Engi
neer
ing
Requ
irem
ent
Dir
ecti
on o
f Im
prov
emen
t
Uni
t of
Mea
sure
Lam
kin
(Bus
ter)
Scut
i (Bi
g Li
te)
Enlo
w
Nat
ural
Gol
f (Pa
lm
Gri
p)
Des
ign
Targ
et
Expe
cted
Res
ults
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 =Industry Standard
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++
Final Design
Questions?