Mudflaps are now rarely specified as standard on production cars as they interfere with the clean airflow around the vehicle. The removal of this part has led to increases in fuel efficiency in several studies. This is because the air flows over the top of the vehicle, following the smooth lines of the hood and windshield, then collides with the roof rack and causes turbulence. While roof racks are very useful in carrying extra storage on a vehicle, they also increase the frontal area of the vehicle and increase the drag coefficient. Roof rack Ī roof rack is a common trait on many SUV and station wagon vehicles. Most production sports cars and high efficiency vehicles come standard with many of these deletions in order to be competitive in the automotive and race market, while others choose to keep these drag-increasing aspects of the vehicle for their visual aspects, or to fit the typical uses of their customer base. Deletion can be as simple as removing an aftermarket part, or part that has been installed on the vehicle after production, or having to modify and remove an OEM part, meaning any part of the vehicle that was originally manufactured on the vehicle. The deletion of parts on a vehicle is an easy way for designers and vehicle owners to reduce parasitic and frontal drag of the vehicle with little cost and effort. Streamlining the body requires assumptions about the surrounding airspeed and characteristic use of the vehicle. Lowering the drag coefficient comes from streamlining the exterior body of the vehicle. Too much lift can cause the vehicle to lose road traction which can be very unsafe.
Lift is an aerodynamic force that acts perpendicular to the airflow around the body of the vehicle.
A potential complication of altering a vehicle's aerodynamics is that it may cause the vehicle to get too much lift. The drag coefficient is a unit-less value that denotes how much an object resists movement through a fluid such as water or air. The two main factors that impact drag are the frontal area of the vehicle and the drag coefficient. The reduction of drag in road vehicles has led to increases in the top speed of the vehicle and the vehicle's fuel efficiency, as well as many other performance characteristics, such as handling and acceleration.
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