NASA dicit:
“A NASA F/A-18 performs the quiet supersonic dive maneuver of NASA’s Armstrong Flight Research Center in California. The dive include climbing to 50,000 feet, followed by a supersonic, inverted dive. This creates shock waves in such a way that they are quieter in a specific area. The dive has been used in support of NASA’s Commercial Supersonic Technology project, to study perception feedback provided by members of the public.”
Video Credit: NASA Goddard/Jefferson Beck
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