Wing in automotive is an aerodynamic device, the aim is for increasing resistance and / or produce a car down force or to provide aesthetic. In the wing angle of attack in some vehicles can be adjusted downward in order to enhance the unit's rear wheel, but it is the dual result of increased drag. The exact physics impact of the aerodynamics is the world's most protected secret in racing. Simulation and testing of both wings and wind tunnels are usually computationally expensive energy-intensive to run.
Spoilers are often confused with wings, conditions are often (but erroneously) used interchangeably. Performance cars usually use a spoiler rather than a wing. Racing Formula One car, such as the commonly used a spoiler / wing combination known as rear wing assembly. Although formally the same aircraft wing, the wing is usually used in the automotive industry upside down (for upside-down), and sometimes reversed (for backwards) comparison.
High-performance vehicles such as Audi TT see some benefit from properly tuned device drivers and wing installation, but your Audi look very cool, and that's what matters, right? In fact, because of your Audi TT or a front-wheel drive or all-wheel drive, together with a strong seat Audi TT and even negative. Add the wings of a steep turn to a shortage of front-wheel drive vehicles will increase (front wheel to lose traction turn), so you probably want an aesthetic Audi TT Wing or an Audi TT Spoiler.
Source: http://www.namotorsports.net/
Source: http://www.esetuning.com/
Source: http://www.caranddriver.com/
Source: Wikipedia.org, hubpages.com
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