Research in applying aerodynamic drag reduction techniques to ground vehicles was conducted at NASA's Dryden Flight Research Center from the mid-1970s to the early 1980s.
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Research in applying aerodynamic drag reduction techniques to ground vehicles was conducted at NASA’s Dryden Flight Research Center from the mid-1970s to the early 1980s. This photo depicts tufting yarn showing the chaotic airflow around the initial “Shoebox” structure with sharp corners mounted on a van.Aerodynamic Truck Studies fact sheet February 22, 1974
NASA Dryden photo