| 摘要 |
An improved archery arrow is provided which includes an arrow shaft with vanes adjacent its rear end, and a novel arrow pile at its front end. The pile has removable ball bearings, or a threaded weight plug, and/or a scored attaching portion which is readily breakable for shortening and lightening the pile, for controlling the weight and weight distribution of the pile in order to regulate the spine and balance of the arrow for improved performance. The pile point is of improved aerodynamically tapered, dome-shaped configuration for higher, longer flight. Alternatively the pile may have a threaded shaft extending rearwardly therefrom with a split sleeve and wedge threaded thereon. The position of the sleeve and wedge along the length of the shaft adjusts the weight distribution and expansion of the sleeve caused by insertion of the wedge therein provides a mechanism for readily adjusting the pile to fit variations in the internal diameter of the arrow shaft so as to ensure a snug fit between it and the arrow shaft, yet permit ease of installation of the pile in the shaft. The improved arrow is simple, inexpensive and durable and it exhibits improved flight performance, while permitting easy tuning of the arrow to the individual requirements of the archer and his bow.
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