The response characteristic of moving-mass control for the low-altitudeaircraft is researched based on the moving-mass control system model of the flying saucer.
在建立碟形飞行器变质量矩控制数学模型的基础上,对低空飞行器变质量矩控制的响应特性进行了仿真研究。
2
With this radar system and a specially trained Air Force crew the aircraft can operate at a lowaltitude and in night or adverse weather conditions.
有了这种雷达和经过特别训练的空军机组,飞机可以在很低的高度、夜间或不利的天气条件下飞行。
3
Unlike high altitudeaircraft, helicopters aren't so vulnerable to being seen by radar, as they fly low and are often hidden by the terrain. The big issue is the sound.