Science of the effect of air on a body moving through it. The study of physical forces at work when a body passes through the air. In the automobile
world, the term aerodynamic
drag is used to describe the resistance that the air exerts on a car moving at speed. By changing the body shape of a car to reduce dynamic drag, the energy output of the engine can be better utilized either in the form of reduced fuel consumption or improved performance. The French auto manufacturer Citroën pioneered the development of aerodynamic
passenger cars with the DS19 in 1955, and have remained leaders in this field.