Europe is wrapping up tests of a tail design that would reduce the airport noise generated by future business jets, and potentially advanced narrowbody airliners. The U-shaped tail mitigates acoustic emissions by shielding engine jet noise and reflecting it upward away from the ground underneath and to the sides of the aircraft. A full-scale U-tail has been ground-tested under the Shield demonstration, part of the European Union’s Clean Sky aeronautics research program, to validate ...

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