High, Low, and Average Values
167 Tennis Racquet Models - 2002

The following are based on racquet specifications measured by technicians of the U.S. Racquet Stringers Association, and published in Racquet Tech magazine for 2002.

Torque
Newton.meters of torque
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

67.54

90.37

60.03

75.04

57.51

Standard Deviation

5.73

6.74

5.10

6.37

4.29

Worst

81.70

107.12

72.62

90.78

68.16

Best

54.00

74.24

48.00

60.00

47.24

Median

67.22

90.12

59.75

74.69

57.35

 

Impulse Reaction
 Newtons of force
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

-12.12

-21.33

-10.77

-13.46

-13.57

Standard Deviation

5.97

7.10

5.31

6.64

4.52

Worst

-31.18

-41.81

-27.71

-34.64

-26.61

Best

2.43

-6.87

2.16

2.70

-4.37

Median

-12.17

-21.18

-10.82

-13.53

-13.48

 

Shock
 Joules of energy
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

19.41

50.79

2.52

3.93

20.57

Standard Deviation

1.49

3.37

0.21

0.33

1.37

Worst

22.75

58.23

3.06

4.79

23.58

Best

15.77

42.44

2.00

3.13

17.18

Median

19.43

50.89

2.52

3.94

20.61

 

Work
 Joules of energy
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

21.63

70.62

3.44

5.38

28.60

Standard Deviation

1.52

4.22

0.35

0.54

1.71

Worst

25.10

81.54

4.49

7.01

33.02

Best

18.14

62.03

2.63

4.11

25.12

Median

21.39

69.90

3.43

5.36

28.31

 

Shoulder Pull
 Newtons of force
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

48.56

155.16

7.73

12.07

62.83

Standard Deviation

2.30

6.36

0.61

0.95

2.57

Worst

54.31

171.64

9.54

14.91

69.51

Best

42.79

139.54

6.21

9.70

56.51

Median

48.50

154.66

7.71

12.04

62.63

 

Shoulder Crunch
 Newtons of force
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

43.58

111.56

5.65

8.82

45.18

Standard Deviation

2.32

4.88

0.34

0.54

1.97

Worst

48.62

122.62

6.52

10.19

49.66

Best

37.19

97.78

4.72

7.37

39.60

Median

43.48

111.36

5.66

8.84

45.10

 

Elbow Crunch
 Newtons of force
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

60.61

153.83

7.85

12.27

62.29

Standard Deviation

2.71

5.54

0.41

0.64

2.24

Worst

66.90

167.37

8.88

13.88

67.78

Best

52.74

137.33

6.69

10.45

55.61

Median

60.56

153.80

7.84

12.26

62.28

 

Wrist Crunch
 Newtons of force
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

107.86

267.47

13.97

21.83

108.31

Standard Deviation

2.93

6.24

0.49

0.76

2.53

Worst

115.93

283.90

15.25

23.83

114.97

Best

99.18

249.86

12.58

19.66

101.18

Median

108.02

267.44

13.98

21.84

108.30

 

Impact Force
 Newtons acting at mass center
1 Newton = 0.2248 lb
167 Racquets  2002		 1 BC
70 mph forehand, received at 20 mph		 2 BC
110 mph serve		 3 BC
40 mph volley, received at 40 mph		 4 BC
50 mph return, received at 50 mph		 5 BC
70 mph serve

Average

54.32

301.60

214.60

268.25

191.93

Standard Deviation

1.34

7.10

5.31

6.64

4.52

Worst

58.61

322.08

231.55

289.43

204.96

Best

51.05

287.13

201.67

252.09

182.72

Median

54.33

301.44

214.65

268.32

191.83

 

Sweet Spot Average (cm from tip)

18.31

Standard Deviation

1.10

Worst

21.76

Best

15.51

Median

18.35

 

Moment Average (Newton.meters of torque about axis 7 cm from butt)

0.799

Standard Deviation

0.042

Worst

0.942

Best

0.688

Median

0.803

 

Flex Average

67.65

Standard Deviation

5.52

High

80

Low

52

Median

68

 

Swingweight Average (kg.cm2 about axis 10 cm from butt)

313.5

Standard Deviation

18.30

High

395

Low

277

Median

313

 

Mass Average (grams)

293.47

Standard Deviation

32.04

High

354

221

Median

289

© 2002 Wilmot H. McCutchen, All Rights Reserved.