| 摘要 |
The arrow straightness gauge of this invention has an elongated body of a preselected length. A circular cross-sectional passageway traverses the entire length of the elongated body and provides openings at both ends of the elongated body. The aforementioned arrow shaft has a preselected diameter and a preselected length. The circular cross-sectional passageway is provided with an internal diameter greater than the arrow shaft diameter, such that when the arrow shaft is inserted axial through the circular cross-sectional passage there is established a diametral clearance between the arrow shaft to be tested and the internal diameter of the circular cross-sectional passageway. The circular cross-sectional passageway has a diameter equal to the arrow shaft diameter to be tested plus a measurement in the range of between 0.003 and 0.023 times the arrow shaft diameter to be tested. The elongated body of the arrow shaft straightness gauge has a length no less than 0.1 the arrow shaft length the straightness of which is to be tested. The elongated body of the gauge is fashioned of the same material composition as the arrow shaft to be tested.
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