The following table will shed some light on the numbers we use and hopefully shed some light on what they can mean in terms of your racquet.
By using these numbers you can describe what you think needs to be different to enhance your performance!
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Radical MP 2023 |
| Reference Tension | 55 (what you tell the stingers to set the stringing machine). This should be replaced by String Bed Stiffness (SBS) |
| String | MonoGut ZX Pro |
| Machine Used | True Tension Professional |
| String Bed Stiffness - RDC | 53.0 Units (Babolat RDC) |
| String Bed Stiffness -FlexFour | 64.9 pounds (Flex Four) |
| String Bed Stiffness - SBS | 51.8 pounds (Racquet Quest string bed stiffness SBS Master) |
| String Bed Stiffness - ERT | 35 Kg/Cm (previously Beer's ERT1000) |
| Racquet Flex, Babolat RDC | 65 - After stringing (unstrung racquets will be slightly stiffer. Loaded from the tip) |
| Racquet Flex, FlexFour | 44.5 (Loaded from the COP) |
| Racquet - In Plane Stiffness | 379.7 lbs/Inch (stiffness across the 3 ad 9 o'clock positions of the racquet head) |
| Weight, Grams | 326 |
| Weight, Ounces | 11.50 |
| Balance, mm | 333 |
| Balance, Inch | 13.11 |
| Length, Cm | 68.57 |
| Length, Inch | 27.00 |
| Head Width | 9.63 |
| Head Length | 12.79 |
| Head Area, cm2 | 623.0 |
| Head Area, Sq. Inch | 96.7 |
| Beam Height @ Grip, mm | 21.0 (how thick the racquet is looking at the side) |
| Beam Height @ Mid, mm | 22.5 (how thick the racquet is looking at the side) |
| Beam Height @ Tip | 20.5 (how thick the racquet is looking at the side) |
| Beam Width @ Grip, mm | 12.5 (how thick the racquet is looking at the front or face view) |
| Beam Width @ Throat, mm | 11.5 (how thick the racquet is looking at the front or face view) |
| Beam Width @ Mid, mm | 12.8 (how thick the racquet is looking at the front or face view) |
| Beam Width @ Tip, mm | 12.8 (how thick the racquet is looking at the front or face view) |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio Cross/Mains | .634 ( typically the natural ratio) |
| Main String Grid | 7.18 (the distance between the two outer most main strings) |
| Cross String Grid | 9.44 (the distance between the two outer most cross strings) |
| Density (% of head filled with string) | 69.6% (how much of the head area is filled with string) |
| Average Cross String Space | .494 (how far apart the strings are). The farther apart the quicker the wear. |
| Average Main String Space | .449 (how far apart the strings are). The farther apart the quicker the wear. |
| Dynamic Tension, Kp, ERT | 35 (string bed stiffness in kilos per centimeter) |
| Dynamic Tension, Lbs/in | 195.76 (DT converted to pounds per inch) |
| First Moment, Nm | .841 (sometimes called pickup weight) |
| Polar Moment | 347 (torsional weight) |
| Torsional Stability | 16 ( resistance to twisting on off center hits) |
| Swing Weight, Kg/cm2 | 331 (the dynamic weight and the most significant property) |
| Swing Weight, Ounces | 11.68 |
| Swing Weight Calculated | 361.5 (calculated from the butt end to the tip) |
| Power, RDC | 52 (property calculated by Babolat RDC) |
| Control, RDC | 49 (property calculated by Babolat RDC) |
| Manueverability, RDC | 66 (property calculated by Babolat RDC) |
| Power, Calculated | 2101.4 (calculation based on several racquet properties) |
| Head Points | 3.15 ( a point is generally consider to be .125 inches/3.18mm) |
| Head Weight, % | 48.5% |
| Center of Percussion | 21.1 (highest COR) |
| Dwell Time, ms | 8.74 (length of time the ball is in contact with the string without a swing) |
| Efective Stiffness - lbs | 29.2 ( the calculated combined stiffness of the racquet and sting bed) |
| K, Lb/In | 169.87 (string bed stiffness in pounds/inch) |
| Recoil Weight | 156.44 (resistance to twisting about the grip) |
| Twist Weight | 226.48 (resistance to twisting about the neutral axis) |
| End Weight | 126.0 (two scale system to calculate CG) |
| Tip Weight | 197.7 (two scale system to calculate CG) |
| 9 O'Clock | 105.1 (three scale system to assure symmetry) |
| 3 O'Clock | 104.7(three scale system to assure symmetry) |
| Butt Cap | 115.6 (three scale system to assure symmetry) |
| COF, Main | .416 (the stickiness of the string bed sliding the ball with the main strings) |
| COF, Cross | .388(the stickiness of the string bed sliding the ball with the cross strings) |