1 min readEL-2001-00041 Boeing 2.7% 777 model test in the National Transonic FacilityNASADec 31, 2015 Image Article Boeing 2.7% 777 model test #119 in the National Transonic Facility at Langley. Boeing 2.7% 777 model test #119 in the National Transonic Facility at Langley.