| 摘要 |
A golf ball which can achieve an extra distance at the low-speed range of its trajectory from the peak point to the ground to give an increased overall flight distance, said golf ball having a plurality of dimples formed in an exactly or substantially identical arrangement pattern in each of eight equal portions of a spherical surface divided by phantom lines, said arrangement pattern being provided on the spherical surface of the golf ball for forming 416 or 504 dimples without adjacent dimples overlapping each other, said golf ball being in the range of 500 to 1000 in a value defined by the equal <IMAGE> wherein D: the diameter (mm) of dimples, N: the total number of dimples, R: the diameter (mm) of golf ball, Ek: The diameter (mm) of dimple at a a point k microns away from the dimple edge downward, i.e. in the direction of depth of dimple (apparent diameter of dimple when the dimpled land portion is cut in parallel with the plane containing the dimple edge at its opening), and n: the depth of dimple (in microns) For a ball having 416 dimples, the preferred dimple diameter is 3.2-3.6 mm and a depth of dimple such that the total dimple volume is 222-476 mm3. |
