BMW Airbag and tail, plus a tail useful?

Tail, is an integral part of racing, we often see its shadow in the ultra-running and modified car. If you ask your tail what's the use? Most people would say that the "supercharger under pressure. However, you really know the tail is how to work it?

The empennage fact specification is called, it is the school called spoiler, English Writing Spoiler. However, the tail just a spoiler, we see in the car surrounded tablet-like air force component can be called Spoiler. For example, below the front bumper of the front lip (projecting forward is also referred to as "front shovel"), also belong Spoiler, but the effect is completely different and tail, it is rolled to the front air fed into the intake mouth, like an elongated mouth.
In order to open and the other spoiler components distinction, the tail generally called Wing, which is the meaning of the wings, flying wing. Other Spoiler, Wing not to air rolled or directed to a specific place, it acts like an aircraft wing, the use of the upper and lower air velocity different to achieve the pressure of one side to the other side. And wing opposite, Wing above smoothing projection below the air gathered downward pressure on the upper side.
The size of this pressure can be achieved by adjusting the angle of the tail - the greater the angle, the greater the windward side, under the pressure of the more obvious. In the actual game, the team will consider the site characteristics, test laps to get the optimum tuning parameters. In some narrow, multi sharp bends tracks, such as the famous F1 Monaco, competing cars will tail angle tone is relatively large, to enhance cornering performance. Windward side of the large, natural resistance, so the the tail adjustment will affect vehicle speed. 2011 F1 introduced new regulations, the riders in the race will be the designated area, the distance of the vehicle in front 1s, car electronic equipment temporary regulation rear wing the angle (DRS system), to increase overtaking possible. This provision greatly enhance the viewing of the race, but also lead to a lot of accidents.