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The term drag area derives from aerodynamics, where it is the product of some reference area (such as cross-sectional area, total surface area, or similar) and the drag coefficient. In 2003, Car and Driver magazine adopted this metric as a more intuitive way to compare the aerodynamic efficiency of various automobiles.
Citroen CX was a name coinded for that purpose of being in 1975 the lowest drag among world's production cars. Its shape has inspired GMC EV1, so the same value applies. I suggest that every figure be backed by an official reference, otherwise this article might fall into propaganda like too many Wikipedia subjects.
The idea was to create vehicles with the lowest possible drag coefficient. All the cars featured large rear bumpers and curved fins. They were built upon the Alfa Romeo 1900 chassis. Each of the three cars was presented at the Turin Auto Show, in 1953, 1954 and 1955 respectively. The lowest of the three cars' drag coefficient was 0.19, [2] an ...
The Aptera has a claimed coefficient of drag that is very low, at 0.13 as of January 2023. [14] The car was tested at an Italian wind tunnel, the results of which were described by co-CEO Chris Anthony as "pretty pictures".
Drag coefficients in fluids with Reynolds number approximately 10 4 [1] [2] Shapes are depicted with the same projected frontal area. In fluid dynamics, the drag coefficient (commonly denoted as: , or ) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment, such as air or water.
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The average drag coefficient of a 1:5 model of Tatra 77 was recorded as 0.2455. The later model T77a, introduced in 1935, has a top speed of over 150 km/h (93 mph) due to its advanced aerodynamic design which delivers an exceptionally low drag coefficient of 0.212.
The aluminum body was built by the Ludewig Brothers of Essen. Subsequent tests of the motorized model showed a slightly higher but still impressive drag coefficient of 0.186. [2] The Schlörwagen was built on a modified chassis of the Mercedes 170 H. The wheelbase was 2.60 meters, the vehicle was 4.33 meters long and 1.48 meters high.