NASA Bids Farewell To Prandtl-D Models
NASA is saying goodbye to two of its Preliminary Research Aerodynamic Design to Lower Drag (Prandtl-D) aircraft. The aircraft design, which includes a twisted wing and no tail, has been used by student interns at NASA’s Armstrong Flight Research Center for research, data collection and flight tests focusing on wing design optimization theories. Prandtl-D1 is […]