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'Spoilers' to stabilize your car
Nothing changes the look of a car quite as quickly as the addition of a spoiler. A car spoiler, or rear wing, consists of a styled piece of fiberglass that enhances the aerodynamics of your car. Spoiler wings can come in all different shapes and sizes, too. The high hoop spoiler, Supra spoiler, Lip spoiler, Wings West spoilers... there are number-less designs are available. They, of course, add to the beauty of your car, but apart from just the beautification they are very helpful mechanical accessories to make your car stay on the road.
A spoiler is an aerodynamic device attached to an automobile whose intended design function is to 'spoil' unfavorable air movement across a body of a vehicle of some kind in motion. This can result in improved vehicle stability by decreasing lift or decreasing drag that may cause unpredictable handling in a car at speed. Spoilers are often fitted to race and high-performance sports cars, although they have become common on passenger vehicles, as well.
Spoilers for automobiles are often incorrectly confused with, or even used interchangeably with, wings. Automotive wings are devices whose intended design is to actually generate down-force as air passes around them, not simply disrupt existing airflow patterns.
Spoilers generally work by disrupting the airflow going over a moving vehicle. This disruption's primary purpose is to reduce the amount of lift naturally generated by the shape of the vehicle while it is moving. This is accomplished by increasing the amount of turbulence flowing over the shape, "spoiling" the laminar flow and providing a cushion for the laminar boundary layer.
In cars, the result is increasing the contact between the tire and the road surface, thereby increasing traction. This increase in traction allows a vehicle in motion to brake, turn, and accelerate with more stability. Additionally, this is accompanied by an increase in aerodynamic drag. In nearly all cases, drag increases as the speed of the vehicle increases. Thus, some spoilers that are effective at very low speeds often generate excessive drag at high speeds, and spoilers that work well at high speeds are often ineffective while moving slowly.
The main design goal of a spoiler in passenger vehicles is to reduce drag and increase fuel efficiency. Passenger vehicles can be equipped with front and rear spoilers. Front spoilers, found beneath the bumper, are mainly used to direct air flow away from the tires to the under-body where the drag coefficient is less. Rear spoilers, which modify the transition in shape between the roof and the rear and the trunk and the rear, act to minimize the turbulence at the rear of the vehicle.
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