| 摘要 |
<p>PURPOSE:To increase largely directional stability of a hit ball considered to be important as head characteristic of a golf club by disposing a round (a convex curved surface) along principal axis of inertia. CONSTITUTION:A design philosoply of a golf club head quite different from conventional one is employed. That is, in three principal axes of inertia X, Z passing through a center of gravity, G, and mutually crossing at right angles, a round (a convex curved surface) is disposed on a face surface with a ridgeline projected on the face as its center.</p> |
