This paper analyses reason for flame swinging in high-altitude nozzle with the ratio of large area tested under the ground atmosphere, and describes the mechanism of unsymmetrical separation.

本文分析了高空大面积比喷管在地面试验时喷管内出现火焰偏摆的原因，叙述了喷管内气流不对称分离的机理。

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To the surprise of the airlines, control towers began unilaterally to impose a separation of 60 nautical miles between aircraft, irrespective of their altitude.

ECONOMIST: A jam at 32,000 feet