2020 Porsche 911 992 Carrera S Cabriolet (7-Speed Manual Transmission)

Cd = 0.31: Cabriolet with exemplary aerodynamics.
The basic elements of the aerodynamic concept for the 911 Carrera Cabriolet are the streamlined body surface contours, the convertible top, the enlarged variable rear spoiler and the cooling system with its adaptive air flaps at the front which does not need large air intakes under the vehicle and therefore allows a practically smooth vehicle underbody. Optimized air intake and air outlet cross-sections also improve cooling air routing, so theCd value of 0.31for the 911 Carrera S Cabriolet is maintained –when the roof is closed –in spite of the increased engine and braking power.Automatically deploying supplemental safety bars also increase rigidity. The 911 Carrera S and 4S Cabriolet have automatically deploying supplemental safety bars. They essentially consist of a compact, self-supporting portal frame made of welded, high-strength extruded aluminum sections. Due to its high strength, the supporting frame is also used for body reinforcement: it contributes to the torsional rigidity of the Cabriolet through diagonal struts to the B-pillars and convertible top compartment.In the event of an imminent roll-over, two newly developed cassette modules behind the rear seats are extended by spring pressure; triggering takes place pyrotechnically by a micro gas generator. If the convertible top is closed, a carbide metal pin on each of the two cassettes breaks through the safety glass of the rear window. Accidental triggering is practically impossible because sensing and actuation and continuous monitoring are performed by the high-precision airbag control unit with integrated roll-over sensor.This monitors every change in the body inclination, longitudinal and transverse acceleration as well as road contact.

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