| 摘要 |
<p>Non-standard sport projectiles (10), in accordance with this invention, include at least one linear through hole (11). As this non-standard sport projectile (10) passes through the air, after being hit by, for example, a golf club, the non-standard sport projectile (10) spins. When the above-mentioned through hole (11) is generally aligned with the projectile's direction of flight, air passes through the through hole, and the aerodynamic characteristics of the non-standard sport projectile (10) are enhanced. When the through hole (11) is not aligned with the projectiles direction of flight the aerodynamic characteristics are reduced. As a result, the non-standard sport projectile (10) experiences rapidly repeating intervals of relatively high aerodynamic flight and relatively low aerodynamic flight as the non-standard sport projectile (10) spins around the center cross section of the through hole (11).</p> |
