2017年6月26日 星期一

NASA Completes Milestone Toward Quieter Supersonic X-Plane

NASA has achieved a significant milestone in its effort to make supersonic passenger jet travel over land a real possibility by completing the preliminary design review (PDR) of its Quiet Supersonic Transport or QueSST aircraft design.

June 26, 2017
from NASA http://ift.tt/2sKlKWj
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