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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Why 159 degrees?: a story about the dropping of the Hiroshima atom bomb
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Why 159 degrees?: a story about the dropping of the Hiroshima atom bomb

机译：为什么是159度？：有关广岛原子弹投下的故事

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摘要

This paper presents an analysis of the evasive manoeuvre undertaken by the pilot of the Enola Gay aircraft following the dropping of the first uranium bomb. The pilot was instructed to make a 159 degrees turn following the bomb's release in order to acquire the greatest distance from the point at which the bomb explodes. Accordingly, the objective here is to investigate why the angle should be exactly 159 degrees. The optimum flight-path to maximize the distance from the detonation point is analysed by considering the escape or exit angle taken by the aircraft following a turning-manoeuvre that points it directly away from the detonation site. A range of escape angles are predicted based on the requirement to exit the turning radius prior to detonation. By using information that appeared in a historical account of the event regarding the manoeuvre undertaken by the pilot following the release of the bomb, an estimate is made of the escape angle. Despite the fact that the result shows reasonable agreement with the value of 159 degrees, some uncertainty is expressed as to the close coincidence obtained. In addition, the location of the aircraft and the time of arrival of the shock wave following detonation are also briefly discussed.
机译：本文介绍了对第一枚铀弹投掷后Enola Gay飞机飞行员进行的回避策略的分析。指示飞行员在炸弹释放后转159度，以获取距炸弹爆炸点的最大距离。因此，这里的目的是研究为什么角度应精确地为159度。通过考虑飞机在转弯动作后将其直接引向爆炸地点的逃生角或出口角，来分析使距爆炸点的距离最大的最佳飞行路径。根据在爆炸前退出转弯半径的要求，可以预测一系列的逃逸角。通过使用出现在事件历史记录中的有关炸弹释放后飞行员进行的回旋的信息，可以估算逃逸角。尽管结果与159度的值显示出合理的一致性，但是对于所获得的紧密一致仍存在一些不确定性。此外，还简要讨论了飞机的位置以及爆炸后冲击波的到达时间。

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