GM Reduced Scale Wind Tunnel

General Motors Aerodynamic Engineer Nina Tortosa tests a Chevrolet Cruze 40-percent scale model in GM’s new $30 million Reduced Scale Wind Tunnel in Warren, Michigan. Working suspensions with spinning wheels allow aerodynamic engineers to better examine how airflow affects a vehicle’s underbody while in motion, ultimately resulting in quieter cars and trucks that cost customers less to operate. (Photo by John F. Martin for General Motors)