Aerodynamics and Air Routing

Aerodynamics And Air Routing

One of the objectives in developing the new 911 Carrera/S Cabriolet was to further expand its competitive lead in the area of aerodynamics. Efforts focused on reducing the aerodynamic lifting forces to take in account the enhanced performance. Another goal was to further reduce the drag coefficient, despite the high levels of cooling air required for the brakes and engine. The result of the efforts to optimize aerodynamics is a further improvement in aerodynamic coefficients for the 911 Carrera/S Cabriolet compared to the previous 911 Carrera (996) model.

The drag coefficient of the new 911 Carrera/S Cabriolet was reduced to cw =0.29 (previous model 911 Carrera (996): 0.30). This value cannot be matched by any of our international competitors, particularly for a Cabriolet.

A steadily sloping roof line without any arch edges to disrupt the line, almost continuous transitions from the side windows to rear lid as well as a harmonious, lateral narrowing of the top in the area of the C-pillar contributes to the low drag coefficient. Combined with the rear spoiler on the new 911 Carrera/S Cabriolet, which now extends even further, it was possible to reduce the rear-axle lift even more. The top design, optimized in extensive trials in the wind tunnel, exhibits an optimum arch position, top tension and attachment of the fabric to the top frame with minimal perceptible ballooning, even at high speeds.

All windows are virtually flush with the bodyshell on the 911 Carrera/S Cabriolet. This emphasizes the dynamic feature of the vehicle and reduces airflow noises, even at high speeds. As a new feature here compared to the previous model, the electrically operated rear side windows can now remain closed when the top is open to further reduce whirling noises inside the vehicle.