Imprint Contact 868 Videos
900.000 Callings


Wheel change
Save Energy

Video Body
Video History
Video Body Development 1
Video Body Development 2
Video Coachwork - Package
Video NCAP norms
Video Body Repair 1
Video Body Repair 2
Video Model development
Video Efficient Develop.
Video Design 1
Video Design 2
Video Design 3
Video Design 4
Video Design 5
Video Design 6
Video Design 7
Video Design 8
Video Carbody Terms
Video Oldtimer Restoration
Video Wind-tunnel
Video Ferrari F 1
Video Drift
Video Aerodyn. Resist. 1
Video Aerodyn. Resist. 2
Video Aerodyn. Resist. 3
Video Frontend
Video Deep-drawing
Video Bending
Video Profile Rolling
Video Aluminum Body 1
Video Aluminum Body 2
Video Aluminum Body 3
Video Glass Roof
Video Panorama Glass Roof
Video Bulletproof Glass
Video Cross Section
Video Body (rear part)
Video Vehicle Floor Trim
Video Interior Decoration
Video Autom. dimming mirror
Video Seat 1
Video Seat 2
Video Folding rear seats
Video Impact Energy
Video Scrap Recycling 1
Video Scrap Recycling 2
Video High roof cars
Video Sports Utility Veh.
Video Minivan
Video Convertible
Video Folding Roof
Video Body (convertible)
Video Convertible study Seat
Video Convertible Body
Video Body Range
Video Rollover-protection
Video Body (transporter)
Video Aerodynamic (F-1)
Video Glass 1
Video Glass 2
Video Glass 3
Video Glass 4
Video Glass 5
Video Glass 6
Video Window tinting
Video Car wash 1
Video Car wash 2
Video Car wash 3
Video Paintwork 1
Video Paintwork 2
Video Paintwork 3
Video Color Matching
Video Car Wrap
Video Plastic coating
Video Polishing
Video Small Dents
Video Large Dents
Video Bumpers
Video Two-part Door
Video Sectional Repair
Video Straight. Equipment
Video Hydr. Body Repair
Video Repair Bench 1
Video Repair Bench 2
Video Pange and Flange Tool
Video Screw Production
Video Tin-plate
Video Alum. welding

Video Body 1
Video Body 2
Video Comfort - Interior 1
Video Comfort - Interior 2

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Aerodynamic Resistance
    (additional information)


If one were to design a car strictly according to aerodynamic guide-lines, it would have a great amount of influence on the form and on the cross-sectional surface. Ever since 1920, tests have been done repeatedly in this direction. In the above figure, an example of the long gone company of Borgward, which in 1954, tried to get very high performance out of their weakest model, the Lloyd with a 300 cm³ two-stroke engine.

How it works

The air-flow around the car body does not only influence the performance and the consumption, but also the chassis and the centre of gravity. The further the centre of gravity moves to the rear, the more unfavorable is the crosswind behaviour. In addition, a part of the drag coefficient is sacrificed to generate down-drive on the axles. The interior ventilation also plays a part. This has become easier with the continuous circuit for the electric fans. Even the possible influx of exhaust gases, perhaps through the air vents, must be tested and accordingly eradicated.A further subject is the noise development in modern vehicles. Here the body-work building also plays an important part. It depends on the optimising of details, which can even be influenced by the standard-spreading-variables. Apart from this, multiple door-sealings also play a part. A problem, still not optimally solved is, e.g., the noise development of partly open sunroofs. Generally speaking, wind resistance and acoustics are closely related.

An important aerodynamic component is the windscreen, not only because of it's incline. Opinions differ about the placement of the A-pillar. Not only because of the wind noises, together with those from the rear-view mirror, but because of the forward vision aspect. An aspect receiving less attention, is the flow of the rain water on the windscreen. Mostly drain-strips provide for the fact that it does not flow over the side windows, thus dirtying them as well. In adition, apparently peculiar wiper constructions are sometimes to be found, to avoid the so-called 'water dragging'. This develops from water swirling, e.g., next to the A-pillar, which allows the rainwater to reach the wrong side of the wiper blades.

As long as only very little wind is blown around the car body, the problems are relatively small. At higher speeds they increase rapidly, the wind excercises enormous forces, on certain points, driving force, and on other points, vacuuming off the air, on anything which is not solidly mounted, or must be movable to fulfill it's function. This is especially valid for roof racks and for spoilers, although, even very solidly built convertible roofs are not really silent during strong crosswinds. It becomes even worse if the wind conditions change abruptly. 10/09               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

Our E-Book advertising