Quote:
The design of the BAT 7 prototype was based on a study of aerodynamics. The shape of the front aimed to eliminate the problem of airflow disruption at high speeds. The design also aimed to do away with any extra resistance generated by the 16” wheels when revolving. This was achieved by the intriguing tiramaran nose, which channelled air into the inlets and extracted it behind the front wheels. The nose design also resulted in a structure which reduced the amount of air vortexes.
Other aerodynamic details included the impressive tumble-home on the side windows, which were angled approximately 45° to the vertical, and a large windscreen which blended in perfectly with the almost flat roof.
The most surprising aspect of the design was the tail, with an extended rear window divided by a slim pillar; the whole affair being flanked either side by two elegant fins which tapered upwards and inwards. Flow patterns were shaped by these rear fins, which each included a small slot for pressure relief.
In practise, these rigorous criteria resulted in an astonishing Cd value 0f 0.19.
|
According to this website the CD is 0.19.