1994-2002 [Subscribe to Daily Digest] |
"Aerodynamic Exterior Design
The 9-3 Viggen's aggressive front spoiler, rocker panel extensions, rear bumper cover and rear wing aren't just stylish - they serve a purpose. Fully integrated into the already sleek shape of the Saab 9-3, these elements give the Viggen dramatically improved aerodynamic properties. The Coupe and 5-Door Viggen's coefficient of drag (Cd) has been decreased a full 8 percent to 0.31 Cd, and Saab engineers have managed to reduce lift forces at the rear wheels by 60 percent. The 9-3 Viggen Convertible's coefficient of drag is reduced to 0.33 Cd.
Instrumental in decreasing the Viggen's drag is the deep front spoiler and pronounced rocker panel extensions. The front spoiler pushes more of the airflow over the surface of the body rather than allowing it underneath. The integrated rocker panels contain and channel what airflow there is under the body rather than allow it to dissipate from the sides. When the directed underbody airflow exits the rear of the car, it properly integrates into the airflow off of the rear wing. These elements not only improve the Viggen's stability at speed, but also reduce both wind noise and fuel consumption.
However, the advantages of utilizing such an aggressive front spoiler present a challenge.
Increased airflow over the car adds to the lift forces at the rear of the car, which can have a destabilizing effect under heavy braking from high speeds. To counter this possibility, the rear wing was designed to dramatically reduce lift forces at the rear and regain the front/rear balance of the car.
The Saab JA37 Viggen's delta wing design provides the lift and agility necessary to enable this multi-purpose jet fighter to perform its airborne duties. In contrast, the inverted rear wing designed for the 9-3 Viggen, with greater surface area on the underside than on top, keeps the earthbound Viggen firmly planted on the ground by creating an area of low pressure beneath the wing. This provides enhanced high-speed stability and a more linear response to hard braking, preventing the 9-3 Viggen from "nose diving" during high-speed deceleration. Balance is the key, not only for Saab JA37 Viggen jet fighter pilots, but also for pilots of the low-flying Saab 9-3 Viggen automobile. "
pmr
'99 9-3 Viggen
'99 9-5 SE V6
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