GM Reduced Scale Wind Tunnel

This front suspension of a Chevrolet Silverado 40-percent scale model is fully operational and accurate to the smallest detail. Tested in General Motors' new $30 million Reduced Scale Wind Tunnel, these working suspensions with spinning wheels allow aerodynamic engineers to better examine how airflow affects a vehicle’s underbody while in motion. GM’s customers benefit from quieter cars and trucks that cost less to operate. (Photo by John F. Martin for General Motors)