| 摘要 |
<p>PURPOSE:To make a long club lightweight and make a short club easy to grasp the swing timing by decreasing the inner diameter of the fiber-reinforced plastic shaft of the golf club in sequence from the club with a smaller club number to the club with a larger club number. CONSTITUTION:Fiber-reinforced plastic shafts 3a-11a of golf clubs 3-11 are the same in outer diameter, but the club with a larger club number is made thicker than the club with a smaller club number by increasing the number of wound times of a fiber sheet in sequence. The long club with a small club number is made lightweight, the head speed is increased, and the flight distance can be extended. The club with a larger club number is made thicker than the club with a smaller club number in sequence, thus the torsion of the short club with a large club number is made small like a steel shaft, the augmentation of the natural frequency is increased, the reduction of the inertial moment using a grip end as a rotary center is decreased as the club number is increased, timing is easy to grasp, a miss shot rarely occurs, and the precision of the directivity and flight distance is improved.</p> |
