Wake turbulence between the two aircraft as well as engine performance and flight control responsiveness in the stratosphere were evaluated.
两架飞机之间的尾流以及在平流层飞行时的发动机性能和飞行控制响应都进行了评估。
The contract supports Dryden's planned operation of the two aircraft, their associated ground control station and related systems.
合同将为Dryden中心的两架“全球鹰”、辅助地面控制站以及相关系统提供作战规划。
Building more aerodynamic aircraft and operating them more efficiently (by reducing air-traffic-control delays, for instance) could produce about two-thirds of those savings.
制造更符合空气动力学的飞机，并用更有效的方式来运营飞机——例如减少空中交通控制而产生的延误，这些方法可以为这些节省做出大约三分之二的贡献。
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