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Average full-size passenger cars have a drag area of roughly 8 sq ft (0.74 m 2). Reported drag areas range from the 1999 Honda Insight at 5.1 sq ft (0.47 m 2) to the 2003 Hummer H2 at 26.5 sq ft (2.46 m 2). The drag area of a bicycle (and rider) is also in the range of 6.5–7.5 sq ft (0.60–0.70 m 2). [5]
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.
Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling resistance and vehicle's air drag.
When air flows around the wheel wells it gets disturbed by the rims of the vehicles and forms an area of turbulence around the wheel. In order for the air to flow more smoothly around the wheel well, smooth wheel covers are often applied. Smooth wheel covers are hub caps with no holes in them for air to pass through. This design reduces drag ...
is the drag coefficient – a dimensionless coefficient related to the object's geometry and taking into account both skin friction and form drag. If the fluid is a liquid, c d {\displaystyle c_{\rm {d}}} depends on the Reynolds number ; if the fluid is a gas, c d {\displaystyle c_{\rm {d}}} depends on both the Reynolds number and the Mach number .
Three years after opening the store, Tire Rack got into the mail order business and by 1990 the store was shut down. [2] In 1995, Tire Rack began its website where it posted reviews of tires it sold. [2] In 1998, Tire Rack began online sales. [3] By 2005, Tire Rack had grown into a nationwide company that distributes more than 2 million tires ...