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Web URL(s): | https://stri.lib.msu.edu/vol62-1986/pdf/sptri86062101.pdf Last checked: 10/2003 Requires: PDF Reader Notes: Available to TGIF and STRI users |
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Publication Type:
| Refereed |
Author(s): | Thorpe, J. D.;
Canaway, P. M. |
Author Affiliation: | Lawn Tennis Assoc. of Victoria, victoria, Australia; and The Sports Turf Research Institue, Bingley, West Yorkshire, United Kingdom; respectively. |
Title: | Performance of Tennis Court Surfaces II. Photometric Methods for Measuring Pace and Bounce Under Playing Conditions |
Source: | Journal of the Sports Turf Research Institute. Vol. 62, June 1986, p. 101-117. |
Publishing Information: | Bingley, England: The Sports Turf Research Institute |
Keywords: | TIC Keywords: Tennis courts; Impact tests; Sports turf; Playability
|
Geographic Terms: | United Kingdom |
Abstract/Contents: | SUMMARY: "Pneumatic and mechanical ball projectors were used to project balls on to tennis court surfaces and the resulting impacts were observed using a cine camera. Two series of tests were run: Series A, without spin and Series B, with spin. Ball velocity (and spin in Series B) before and after impact was calculated from a frame by frame analysis of the cine film. Dynamic coefficients of restitution in the vertical and horizontal planes were calculated. For the Series B tests energy budgets were constructed for the impacts and the energy lost on impact was determined. Relationships among variables were investigated using multiple regression and correlation. The Series A tests showed that the dynamic coefficient of restitution (DCR) was greater than the coefficient of restitution (CR) derived from simple ball bounce tests on all courts measured. Measurements of the dynamic coefficient of horizontal restitution (CHR) suggested that small differences in CHR have a large influence on how a court "plays". Both CHR and DCR were related to ball velocity before impact, although the relationships were weak. In the Series B tests only two courts were tested and these showed no significant differences between them in any of the variables measured. However, the tests showed that spin was the most important variable influencing DCR and CHR. Energy losses on impact between the ball and the surface were also related to spin and velocity before impact. Both series of tests suggested that simple ball bounce tests are of limited relevance to court performance under playing conditions and indeed it is possible that the ITF method of testing balls may require refinement to include dynamic testing. The possible mechanism of ball/surface interaction is duscussed and proposals are put forward as to how the methods outlined could be used to develop specifications for the pace and bounce of tennis courts. These would involve a combination of player evaluation and objective tests on courts carried out in conjunction with the tennis authorities." |
Language: | English |
References: | 3 |
Note: | Summary as abstract Tables Appendix: 2 |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Thorpe, J. D., and P. M. Canaway. 1986. Performance of Tennis Court Surfaces II. Photometric Methods for Measuring Pace and Bounce Under Playing Conditions. J. Sports Turf Res. Inst. 62:p. 101-117. |
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| Web URL(s): https://stri.lib.msu.edu/vol62-1986/pdf/sptri86062101.pdf Last checked: 10/2003 Requires: PDF Reader Notes: Available to TGIF and STRI users |
| MSU catalog number: SB 433 .A1 S63 |
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