Like many race car drivers and automobile technicians, Bobby Unser recognized that every performance advantage, even a small one, could spell the difference between winning and losing. As a driver, he brought a hands-on perspective to his experiments in the shop. Despite never finishing high school, he instinctively applied the scientific method when solving technical problems. His systematic, intensely practical approach led to a quick, inexpensive method of measuring airflow under race cars, putting him at the forefront of the new aerodynamic development known as "ground effects."