Wilson Ultra 100 CV Variable(s)

Tim recently posted a good review of the Wilson Ultra 100 CV and I thought it would be fun, and just maybe informative, to see what an alternative string, tension, and machine would have on the data.

This presentation is to visualize what a difference can be made by racquet technicians through understanding what affects the performance of a racquet.

A few things stand out:

PropertyTechnician 1Technician 2Variable
Percent
Tension Set5855-35.1 %
FF, ASPS6164+34.6 %
RDC, ASPS7152+1926 %
DT4133+819.5 %
Effective Stiffness35.230.0+5.214.7 %

Technician 1 uses a string with a Power Potential of about 9%, technician 2 uses a string with a Power Potential of 13.6%, and technician 2 uses a lower tension setting.  The essential number as far as I am concerned is the "Effective Stiffness".  This represents the stiffness of the string bed combined with the racquet stiffness.  As you would expect the 18 gauge is "softer".

Here is the rest of the data.

ManufacturerWilson
Racquet ModelWilson Ultra 100 CV V2.0
Reference Tension55
StringAshaway Dynamite 18 Soft
Machine Strung onTrue Tension Pro
Static Data
ASPS, RDC52
ASPS, FlexFour64
Racquet Flex, RDC71
Racquet Flex, FlexFour69
Weight, Gram324
Weight, Ounces11.43
Balance, mm333
Balance, In13.11
Length, Cm68.45
Length, In26.93
Head Width9.88
Head Length13.00
Head Area,Cm650.5
Head Area, Sq. In100.8
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains0.640
Main String Grid7.32
Cross String Grid9.61
Density0.692
Average Cross String Spacing0.507
Average Main String Spacing0.453
Dynamic Data
Dynamic Tension, Kp, ERT33
Dynamic Tension, Lbs/In184.57
First Moment, Nm0.836
Polar Moment335
Torsional Stability17(the difference between polar moment and swing weight) the higher the better.
Swing Weight, Gram318
Swing Weight, Ounce11.22
Swing Weight Calculated359.3
Power, RDC56
Control, RDC44
Maneuverability, RDC75
Power, Calculated2276.4
Head Points2.83 (negative number = head heavy)
Head Weight %48.7 (% weight distributed toward head)
Center of Percussion20.5 (location from the butt to the point creating minimum rotation on ball impact)
Dwell Time, Ms8.82
Effective Stiffness30.0
K, lb/in166.67(weight required to deflect string bed 1 inch)
Recoil Weight144.51
Twist Weight235.98

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