1 min readNASA Armstrong 2016 AchievementsNASADec 21, 2016 Image Article Prandtl-D’s wing design features a twist that redistributes the wing’s span load to reduce drag. ED15-0330-079 Prandtl-D’s wing design features a twist that redistributes the wing’s span load to reduce drag. October 28, 2015NASA Photo / Lauren Hughes