| Autor: |
Monk, S. A., Davis, C. L., Strangwood, M., Otto, S. R. |
| Předmět: |
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| Zdroj: |
Engineering of Sport 5, Volume 2; 2004, p230-237, 8p |
| Abstrakt: |
The influence of friction between ball and wedge face on backspin generation has been investigated. Spin studies were carried out using a mechanical golfer with a stereoscopic launch monitor to measure the club head velocity, ball launch angle, velocity and backspin magnitude immediately after impact between wedge and ball. Different combinations of wedges and ball were used to determine the role of golf ball hardness and material type and wedge surface roughness on the launch characteristics. Modified pin-on-disc testing was carried out using a range of ball types and disc roughness values to determine the friction coefficient between ball and disc. It was found that the polyurethane (PU)-covered balls gave greater backspin in the launch study tests than the ionomer-covered balls. The greater backspin correlated with a higher average friction coefficient during pin-on-disc testing for the PU-covered balls than the ionomer-covered balls. During pin-on-disc testing no dependence of friction coefficient with surface roughness was observed for the polyurethane ball cover type, although the ionomer covered ball showed a slight trend to increased friction coefficient with increased surface roughness. However, during mechanical golfer tests it was found that the ionomer-covered balls showed an increasing backspin magnitude with increasing wedge surface roughness, no trend was seen for the PU-covered balls. The dependence of backspin on contact area during impact testing for PU-covered balls is discussed in the paper. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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