Target archery competitions are conducted outdoors, exposed to the prevailing weather conditions. Competition takes place over long target distances and wind drift of the arrows is a significant cause of score loss. In this article, the dynamic behaviour of an arrow in free flight and wind drift are modelled, allowing for both the arrow initially aligning itself with the resultant airflow and the arrow flexing. The arrow has been modelled as an inextensible flexible beam, and the resulting partial differential equations solved using a finite difference method. Lift and drag for the various arrow components have been calculated using the local angle of attack for those components. It is shown that archers should use small diameter arrow shafts with a high density in order to minimise wind drift. Even for the best arrows, the drift for a 3-m/s side wind is greater than four score rings for a recurve bow at a target distance of 70 m with a 1220-mm diameter target face and nearly two score rings for a compound bow at a target distance of 50 m with an 800-mm diameter target face.

中文翻译：

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箭头在风中的动态行为

目标射箭比赛在户外进行，暴露在普遍的天气条件下。比赛在很长的目标距离上进行，箭的风漂移是得分损失的重要原因。在本文中，箭在自由飞行和风漂移中的动态行为被建模，允许箭最初与合成气流对齐并允许箭弯曲。箭头被建模为不可扩展的柔性梁，并且使用有限差分方法求解得到的偏微分方程。使用这些组件的局部攻角计算了各种箭头组件的升力和阻力。结果表明，弓箭手应该使用高密度的小直径箭杆，以尽量减少风漂移。即使是最好的箭，