German researchers are pleased so far with the results of their summer launch of a rocket-boosted hypersonic demonstrator, which reached 11 times the speed of sound, even though it is now clear they will not be able to recover the vehicle payload from its resting place at the bottom of the Greenland Sea. The Sharp Edged Flight Experiment (Shefex II) aimed to validate structures, systems and design technology for future spacecraft that will be more maneuverable for reentry and landing ...
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