DALLAS - The joint venture between NASA and Boeing to develop a Transonic Truss-Braced Wing (TTBW) configuration as part of NASA's Sustainable Flight Demonstrator project has moved a step forward after Boeing ferried an MD-90 aircraft from Victorville to nearby Palmdale for modification work. The aircraft, registration N931TB was initially delivered new to China Northern Airlines (CJ) in 1995 before moving to Delta Air Lines (DL) in 2011. It will now be converted into the X-66A demonstrator before ground and flight testing, which is expected to commence in 2028. Boeing, NASA and community leaders were at the Palmdale facility to welcome the jet's arrival. Boeing Chief Technology Officer Todd Citron said,
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