*Patent Pending*Patent PendingThe purpose of this experiment was to create a tennis racquet that provided the player with a better balance of power and control. To achieve this goal a standard racquet was strung with a multi tension stringing pattern. This pattern creates a racquet with looser strings in the center(sweet spot) of the racquet, and tighter strings on the perimeter of the racquet. This was done by first stringing the vertical loose strings at 24.97kg(55lbs). This was done by pulling tension on the five lengthwise strings on each side of the center of the racquet(indicated by a dot on the frame). Then one must tie outer knots on both ending sections. Than one strings the ten loose horizontal strings,starting with the grommet(place on the frame where the strings pass through) two above the PWS, at 24.97kg(55lbs). Than tying off with an outer knot. After completing the loose strings one must string the left tight vertical strings at 29.51kg(65lbs).This is done by making an outer knot on the first unstrung grommet on the left on the left side of racquet head and pulling tension on the three strings and ending with an outer knot. After the completion of these tight strings one must string the top horizontal and right vertical stings at 29.51kg(65lbs). To do this one must tie a knot on the left outside lowest grommet. Then one must pull tension on the five top horizontal strings, then continuing down the right side of the racquet and pulling tension on the three right side vertical strings. Then tie off with an outer knot. After completing these one must string the three tight bottom horizontal strings. This is done by tying an outer knot on the first unstrung grommet below the already strung area. Then one must pull tension on the three bottom strings at 29.51kg(65lbs) and then ending by tying off with an outer tie. After completing the racquet one must perform the power and control tests on the racquet. To perform the power test one must lay the racquet on the smooth cement surface and immobilize the neck with a 9.08kg(20lbs) weight. Have someone drop a tennis ball from 121.92cm(48inches)onto the racquet head while someone else sights the highest point the ball reaches after striking the racquet head. Take pictures of this process and repeat it 100 times. After completing this test one must test the multi tension racquet for accuracy. This is done by loading a ball machine with 100 new Pro Penn tennis balls . On a tennis court turn the ball machine on and hit 100 forehands and record the number of balls that landed in the singles court. Repeat this process so that one has recorded how many balls out of 200 landed in the singles court. To find the percentage of successfully completed shots use this formula; X/200 x 100= % in. After completing these tests on the multi tension racquet, string three Wilson Pro Staff 6.1si tennis racquets with the standard pattern at the high tension of 29.51kg(65lbs) the ideal tension of 27.24kg(60lbs) and the low tension of 24.97kg(55lbs). After stringing these racquets perform the power and control; tests on them.
The accuracy test was done on the three standard and one multi tension racquet, to find which had the most controlling effect on the ball. This test found that the multi tension racquet strung at 24,97kg(55lbs) in the center or sweet spot of the racquet, and at 29.51kg(65lbs) on the perimeter completed 88% of the 200 shots hit. This was higher than the standard low tension racquet's[24.97kg(55lbs)] percentage of 82.5%. The multi tensions percentage was lower then the standard ideal tensions[27.24kg(60lbs)] 89.5%, and the standard high tensions[29.51kg(65lbs)] percentage of 93%.
The power test was performed on the three standard racquets and one multi tension racquet , to find which racquet had the most power. This test found that the multi tension racquet which had the second highest average averaged 104.9097cm. The standard low tension racquet which had the highest average, averaged 107.06949cm. The standard high tension racquet came in fourth with the lowest average of 97.931111cm. The standard ideal tension racquet placed third with an average of 102.57772cm. Due to all the data collected during the power and control tests, the experimenter concludes the following. The multi-tension racquet provides the tennis player with a better balance of power and control than achieved with conventional single tension racquets.