When designing a new car model, the aerodynamic engineers often face a dilemma. While a low drag coefficient is desirable for higher top speeds and lower fuel consumption, high downforce is beneficial for driving dynamics. These two different aerodynamic goals are in conflict with each other. To resolve this problem, Porsche created Active Aerodynamics system.

Porsche Active Aerodynamics

Porsche Active Aerodynamics (PAA) system actively optimizes car’s aerodynamics. It uses different active aerodynamic elements, like cooling air flaps, front spoiler and rear wing to support specific driving dynamics demands. Depending on the Porsche model, the active aerodynamic elements include cooling air flaps, front spoiler and rear wing. Nowdays, all Porsche model lines feature some active aerodynamic elements.

For example, in the 911 Turbo S (992.1), the PAA system also includes a Wet Mode function. It moves the aerodynamic balance towards the rear axle for greater driving stability in wet road conditions. Another addition is the airbrake function. It produces higher drag and greater downforce in the event of full braking at high speed and therefore results in a shorter braking distance and greater driving stability. PAA is also used for adaptation to the changed air flow around the vehicle when the sliding roof or convertible top is open. So the PAA system doesn’t just improve performance or fuel economy, it can improve also safety and driving pleasure in different situations.

Milestones of the Active Aerodynamics

Porsche has continuously improved the aerodynamics of the 911 from generation to generation. Although aerodynamics have played an important part in every Porsche model, we can highlight some important milestones on the path towards active aerodynamics.

• In 1971, the Porsche 911 S was fitted with a front spoiler. It accelerated the air flow under the vehicle and guided part of the air past at the sides. This solution reduced the front-end lift.
• The Porsche Carrera RS 2.7 was launched in 1972. It featured a low front fascia and a distinctive spoiler above the rear decklid, known as the legendary “duck tail”.
• Porsche unveiled the first 911 Turbo in 1975. A distinctive feature of the first Turbo was the large fixed rear spoiler with a black shell made of polyurethane (PU).
• The Porsche 911 Carrera 4 of the 964 generation made its debut in 1989. It was the first model with an electrically-extending rear spoiler.
• In 2014, Porsche introduced adaptive aerodynamics with the 911 Turbo. The front and rear spoilers extended depending on speed and driving mode.

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