A prototype car being tested in a wind tunnel at Mazda, Japan. The smoke streams indicate the general behaviour of the air flow around the car and are used to assess the coefficient of drag (CD), which expresses the resistance of the car moving through the air. Tiny woolen strings are also attached to the frame. These are used to show the air flow patterns on a smaller scale close to specific points such as the windscreens, air intakes for cooling and the wheels.
Model release not required. Property release not required.