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Uploaded on Nov 21, 2008
Video by the Japan Aerospace Exploration Agency (JAXA) showing its planned Silent Supersonic Technology Demonstration (S3TD - also known as S-Cubed). The 13.3m-long, 4,000kg unmanned demonstrator is planed to fly in 2012-13, taking off from a runway, accelerating to beyond Mach 1.4 to measure sonic boom, then returning to a runway landing.