| 摘要 |
<p>PURPOSE:To improve the loft and direction of a ball by keeping the major diameter of a chip terminal and that of a butt terminal constant in spite of the count of a club, keeping the major diameter of prescribed length from the chip terminal, forming length to a remaining butt terminal in tapered shape, and setting the weight of a shaft and a kick point at prescribed values corresponding to the count. CONSTITUTION:The major diameter (d) of the chip terminal 4 and the major diameter D of the butt terminal 7 are kept constant. The major diameter (d) of prescribed length S from the chip terminal 4 is kept constant and the length S is also set shorter as increasing the count. A part from the inner terminal 6 of a constant major diameter part 5 to the butt terminal 7 is formed in tapered shape. The whole weight of the shaft is increased as increasing the count, and the kick point is set by moving from the chip terminal 4 to the butt terminal 7 side.</p> |
