A testbed for future fuel-efficient civil transport and unmanned aircraft with slender, flexible wings has made its first flight at NASA's Dryden Flight Research Center at Edwards AFB, Calif. The X-56A Multi-Utility Technology Testbed (MUTT) has been built by Lockheed Martin Skunk Works for the U.S. Air Force Research Laboratory (AFRL) and NASA to test active aeroelastic control technologies for flutter suppression and gust-load alleviation. The 28 ft.-span, 480-lb. unmanned aircraft ...

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