| 摘要 |
PROBLEM TO BE SOLVED: To reduce an air resistance to cause an arrow to fly a far distance and to enable a rate of getting target to be increased by a method wherein a rear end part of an arrow shaft of an aluminum alloy pipe is formed to a helical shape. SOLUTION: A pipe made of an aluminum alloy, glass fiber, carbon fiber and synthetic resin or the like is formed into a circular shape so as to make an arrow shaft 1. An extremity end of the arrow shaft 1 is provided with a conical, line-stream shape or bullet-shaped arrow head 3 made of steel, or stainless steel. A rear end of the arrow shaft 1 is provided with an arrow slit 4 made of plastic material having a slit therein. Then, a groove having a helical shape of concave type is formed inside a diameter of the arrow shaft 1 just before the arrow slit 4 of the arrow shaft 1. With such an arrangement as above, it is possible to reduce an air resistance while shooting the helical arrow by a bow, cause the arrow to fly a far distance, rotate it in a helical shape, make a stable flying of the arrow and increase a rate of getting a target. |
