Category Archives: Technology

Accuracy Index…what is it?

For a few years, Racquet Quest has been using an “accuracy index” to clarify and understand how the string bed stiffness at a given location can affect where the ball goes. You may say that is the players skill working…or not!

However, players take heart, we know how the string bed accuracy can and will put the ball where you didn’t intend for it to go!

Our Accuracy Index is predicated on racquet support effectiveness and main and cross string junctions matching the “target tensions”. The natural ratio of the racquet is the basis for the target tensions. The “natural ratio” of a racquet is the difference in main string tension and cross string tension in a freshly strung racquet. For example; the main string tension is 50 and the cross string tension is 38 the “natural ratio” is 76%.

The Efficiency Index is the measure of the stringing machines support capabilities. The lower the number the worse the machine support is, therefore the racquet is under a lot of stress and we know what stress does to everything! It is bad!

https://racquetquest.tennis/wp-content/uploads/2019/02/Vega_16x19_accuracy_.pdf

Wilson Clash Tour

If you read the Wilson Clash 100 review there is not much to say about the Wilson Clash Tour in terms of graphics because it is exactly the same!

So we can go directly to the differences between the two models. The Tour does have the “word” tour on the racquet but little else in terms of racquet specifications and that is by design.

Wilson Clash Tour

Typically a racquet will have some little tiny descriptions such as weight, head size, string pattern, etc. but these racquets have none of that. Wilson, with this racquet, wants the player to make all the decisions based on “feel, control, and power” and not be influenced by descriptors. As you might expect this model is a little heavier overall and in swing weight thus the “Tour” designation.

Our Wilson Clash and Clash Tour demo racquets are strung with Luxilon Natural Gut as the main string and Wilson Sensation Plus as the cross string. This combination should maximize the performance of the racquet.

Before we get to the specifications of the Tour model there is another slightly unusual design feature. The grip pallet is not molded onto the frame but is formed by the carbon fiber. This manufacturing technique does not allow for easy (seriously not easy) grip size and shape customization so be certain you get the grip size you need.

Take a look at the following data to see if you think this new concept is worth a try. Based on the feedback we are getting I would say yes, definatley!

ManufacturerWilson
Racquet ModelClash Tour
Reference Tension58 lbs - 26.3 kg
String
Luxilon 125 Gut =M
Wilson Sensation Plus =X
Machine UsedTrue Tension Professional
Static
ASPS, RDC51
ASPS, FlexFour63
Racquet Flex, RDC47 - After stringing
Racquet Flex, FlexFour25
Racquet - In Plane Stiffness317 lbs/Inch
Weight, Grams328
Weight, Ounces11.57


Balance, mm318
Balance, Inch12.52
Length, Cm68.5
Length, Inch27.0
Head Width9.91
Head Length12.89
Head Area, cm2647.3
Head Area, Sq. Inch100.3
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.647
Main String Grid7.68
Cross String Grid10.44
Density (% of head filled with string).799
Average Cross String Space.549
Average Main String Space.480
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.76
First Moment, Nm.822
Polar Moment348
Torsional Stability15
Swing Weight, Kg/cm2329
Swing Weight, Ounces11.6
Swing Weight Calculated341.8
Power, RDC39
Control, RDC64
Manueverability, RDC65
Power, Calculated 1586.1
Head Points7.87
Head Weight, %46.4
Center of Percussion21.7
Dwell Time, ms8.91
Efective Stiffness - lbs24.5
K, Lb/In163.46
Recoil Weight174.7
Twist Weight247.8
End Weight 141.6
Tip Weight 195.0
9 O'Clock99.1
3 O'Clock96.9
Butt Cap140.2

Wilson Clash 100

Once in a while words “fit”! Clash fits this new Wilson racquet because it disrupts the trend of “everything stiff”. Luckily this trend is dying and Wilson has, in my view, done a masterful job of expediting that demise with this concept.

Wilson Clash 100

Not only does this racquet look good it just feels good in the hand. It is light, maybe too light, but the brain detects something different about this racquet. We all know racquets are all about “the brain”!

In this review you may notice the addition of a couple of specifications. One is “Racquet – In Plane Stiffness”. This is the racquets resistance to”squeezing the sides together. The higher the number the more resistant (stiffer) the racquet is. Another addition to the review is the three (3) weights taken at the sides of the head and at the very bottom (butt cap) of the racquet. This very helpful when matching or customizing a racquet. so I thought we would include it.

Before this racquet is strung it has a noticeable “softness” which is expected given the 52 stiffness (Wilson is not using the defacto device, RDC, for their stiffness rating). However, after stringing, the racquet takes on a different “feel”. It is like the string is pulling all the material components together! I intend to hit with this racquet tomorrow so as right now I have no idea how it will feel.

To get the maximum from this racquet our demo is strung with Luxilon Natural Gut, 125 and the new Wilson Sensation Plus multi-filament with a “wear” wrap. This should be a great setup, so if you want to hit with the latest technology this is it!

For each racquet we do an “Accuracy Index”. This tells us how accurately the ball will come off the string bed when hit at different locations on the string bed. This racquet has an index of 97, which is very good, in the areas of the string bed that show the most failure (breakage). The overall string bed index of 94 is quite good and tells us that the string bed should produce as much accuracy as the players skill allows!

Take look at the following specifications to see if you agree with the player evaluations you may have read.

ManufacturerWilson
Racquet ModelClash 100
Reference Tension58 lbs - 26.3 kg
String
Luxilon 125 Gut =M
Wilson Sensation Plus =X
Machine UsedTrue Tension Professional
Static
ASPS, RDC56
ASPS, FlexFour61.5
Racquet Flex, RDC51 - After stringing
Racquet Flex, FlexFour27
Racquet - In Plane Stiffness317 lbs/Inch
Weight, Grams309
Weight, Ounces10.90
Balance, mm322
Balance, Inch12.68
Length, Cm68.5
Length, Inch27.0
Head Width9.92
Head Length12.85
Head Area, cm2646.0
Head Area, Sq. Inch100.1
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.650
Main String Grid7.50
Cross String Grid10.37
Density (% of head filled with string).779
Average Cross String Space.547
Average Main String Space.469
Dynamic
Dynamic Tension, Kp, ERT37
Dynamic Tension, Lbs/in206.94
First Moment, Nm.764
Polar Moment321
Torsional Stability15
Swing Weight, Kg/cm2306
Swing Weight, Ounces10.79
Swing Weight Calculated320.4
Power, RDC34
Control, RDC70
Manueverability, RDC83
Power, Calculated 1562.7
Head Points6.46
Head Weight, %47.0%
Center of Percussion21.5
Dwell Time, ms8.50
Efective Stiffness - lbs26.7
K, Lb/In179.49
Recoil Weight155.9
Twist Weight227.1
End Weight 126.8
Tip Weight 181.9
9 O'Clock94.0
3 O'Clock93.9
Butt Cap119.9

Instinct…get it!

The new Head Graphene 360 Instincts are in the shop waiting for your evaluation!


As you can see this new Instinct Series carries forward the “minimalist” graphics concept and a stunning blue color!  

If you have been shopping for a new Porsche lately you may have seen a similiar color they describe as “Miami Blue”!

The Instinct Series offers a MP, S, Lite, and PWR (Power) models. And, thankfully, and amazingly, these performance racquets are realistically priced!

I will be adding racquet specifications soon so come back or sign up for notifications so you won’t miss anything!

All Instinct models are at the Racquet Quest World Headquarters so stop by and take a look.

Here is a look the specifications of the Head Graphene 360 Instinct MP…

ManufacturerHead
Racquet ModelHead Graphene 360 Instinct MP
Reference Tension55.0
String
Head FXP Tour Blue
Machine UsedTrue Tension Professional
Static
ASPS, RDC53.0
ASPS, FlexFour60.0
Racquet Flex, RDC62.0
Racquet Flex, FlexFour46.0
Weight, Grams315.1
Weight, Ounces11.08
Balance, mm326.9
Balance, Inch12.84
Length, Cm68.5
Length, Inch26.968
Head Width9.88
Head Length13.13
Head Area, Sq. Cm656.9
Head Area, Sq. Inch101.8
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.633
Main String Grid7.25
Cross String Grid9.50
Density (% of head filled with string).676
Average Cross String Space.500
Average Main String Space.453
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.76
First Moment, Nm.789
Polar Moment, Kg/cm2325
Torsional Stability19
Swing Weight, Kg/cm2306
Swing Weight, Ounces10.79
Swing Weight Calculated333.7
Power, RDC46
Control, RDC56
Manueverability, RDC83
Power, Calculated 1938.1
Head Points (negative = head heavy)5.20
Head Weight, %47.6%
Center of Percussion20.9
Dwell Time, ms (no swing speed)8.74ms
Efective Stiffness28.6
K, Lb/In169.87
Recoil Weight147.88
Twist Weight228.69
End Weight, grams (Play Ready)126.7
Top Weight, grams (Play Ready)188.4

Merry Christmas, Happy Holidays, Happy New Year & All Other Happiness!

To all of our friends wherever you are and whatever you celebrate we send our wishes for all kinds of happiness for this season and the year to come!

Racquet Quest, LLC World Headquarters

2018 has been filled with great people and friends which add up to the best year ever!

Thank You!

John

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