Measuring Ball Spin Off a Tennis Racket

  • Simon Goodwill
  • Jamie Douglas
  • Stuart Miller
  • Stephen Haake

Abstract

A series of experiments were carried out in which a spinning tennis ball was projected obliquely at a head clamped racket. In each experiment a different string was used in the racket frame. An automated image analysis algorithm was used to measure the velocity and spin of the ball. It has been found that, for the majority of impacts, the magnitude of the ball rebound spin was dependent on string stiffness. It has been concluded that the string stiffness influences the magnitude of stringbed lateral movement during impact. This differing magnitude of lateral string movement, in turn, influences the amount of ball rebound spin.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Choppin, S., Goodwill, S.R. and Haake, S.J. (2005) 3D Player testing. In: Proceedings of the 6th International Conference on the Engineering of Sport (ed F. Moritz & S.J. Haake).Google Scholar
  2. Cross, R. (2001) Stretch tests on strings, Racquet Tech, September, 12–18.Google Scholar
  3. Daish, C.B. (1972) The Physics of Ball Games. English Universities Press, London.MATHGoogle Scholar
  4. Fischer W. (1977) Tennis Racket, US Patent 4273331, 8th December 1977.Google Scholar
  5. Goodwill, S.R. and Haake, S.J. (2004a) Ball spin generation for oblique impacts with a tennis racket, Experimental Mechanics, 44(2), 195–206.CrossRefGoogle Scholar
  6. Goodwill, S.R. and Haake, S.J., (2004b) Effect of string tension on the impact between a tennis ball and racket. In: Proceedings of the 5th International Conference on the Engineering of Sport (ed M. Hubbard, R.D. Mehta & J.M. Pallis), 2, 3–9.Google Scholar
  7. Hall, D. (2002) Three-dimensional reconstruction from planar slices, http://www.mathworks.com/matlabcentral/fileexchange/loadAuthor.do?objectType=author&objectId=982174Google Scholar
  8. Lindsey, C. (2002) String Selector Map, Racquet Tech, February, 4–8.Google Scholar
  9. Lindsey, C. (2004) String Selector Map 2004, Racquet Sports Industry, 1(7), 24–29.Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Simon Goodwill
    • 1
  • Jamie Douglas
    • 2
  • Stuart Miller
    • 2
  • Stephen Haake
    • 1
  1. 1.Sports Engineering, CSESSheffield Hallam UniversitySheffield
  2. 2.International Tennis FederationUSA

Personalised recommendations