Flying testbeds are selected as early flight aircraft for a number of reasons.
选择飞行试验台作为早期试飞的飞机是有很多理由的。
2
More modest, rooftop operations on apartment complexes, hospitals and schools could be testbeds, too.
除此之外，其他更常见的楼宇，如公寓、医院和学校的屋顶上也可以开展相关研究。
3
When it becomes necessary to examine the altitude performance of an aircraft engine, three types of facilities may be used-altitude wind tunnels, altitude testbeds and flying testbeds.