The fender on the car, we all think it is very useful, can block the rainy days of the wheel dumped mud, keep the body clean. But almost all new cars leave the factory without a fender.
Is it a car factory? In fact, it is not a car depot, but the fender will affect the aerodynamic characteristics of the vehicle, will lead to increased wind resistance coefficient, fuel consumption, wind noise, control and other changes. How could this little fender have such a big side effect?
Now let's analyze it. As we all know, cars can be greatly affected by air resistance when they are running at high speed. Data show that when the car speed of more than 80 km/h, air resistance accounted for about 60% of the total resistance of the vehicle; When the car speed of more than 120 km/h, air resistance accounted for about 80% of the total resistance of the vehicle;
When the vehicle is more than 180 km/h, the resistance is almost entirely air resistance, and other resistance is negligible compared to it. In order to reduce the air resistance of the car, engineers usually streamline the design of the car, and make the bottom of the car as smooth as possible to speed up the flow of air, so that the car has a relatively small coefficient of wind resistance.
As a result, many cars use some shields to wrap the chassis, making the chassis look like an entire block. If the car is fitted with a fender, it will disrupt the design of the diversion at the bottom of the car hinder the flow of the bottom airflow of the car, increase the bottom turbulence, slow the air flow rate, increase the wind resistance coefficient of the car, and make the car rising trend more obvious, high-speed driving will have a floating serves feeling, and will make the car's wind noise significantly increase.
According to the test data, if the car four wheels are installed 5cm long fender, the car's wind resistance coefficient increased by 0.05, the car's fuel consumption increased by 10%. Since the fender has such a big side effect, why don't the car manufacturers prohibit the installation of Fender? This is mainly because the fender mainly affects the high speed performance of the car, but it has little effect on the low-speed car.
Most of the world's cars are at low speed, even if the installation of the fender on the car's fuel consumption is not obvious, and can block a part of the muddy water spatter to the car, so that the car looks more beautiful, clean. So should this Fender be fitted? Personal advice: If your car often run high speed, then do not recommend installation;
