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NASA, Boeing pause X-66 to chase breakthrough ultra-thin wing aircraft design
The X-66 program heavily modified a McDonnell Douglas MD-90 aircraft to demonstrate a truss-braced version of the thin wing.
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Boeing, NASA rain-check X-66 evolution to focus on long, thin-wing development
Boeing and NASA are to pause development of the X-66 flight demonstrator to focus their research on the evolution of long, ...