X-Planes are the supersonic daredevils of aviation history - CNET
Starting with the original X-1 in the 1940s, these research aircraft have pushed the bounds of what flies. Now NASA's got a new X-Plane in the works.
from CNET https://ift.tt/2JizSMv
via Mobiles
from CNET https://ift.tt/2JizSMv
via Mobiles
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