F1 cars Rancing Mercedes team introduce Drag Reduction System (DRS) in last year and now F1 make a rule changes in 2013. RDS basiclly a moveable part of the rear wing that reduces drag and therefore increses straight line speed was introduced in 2011, Its use was free throughout practice and quailying that has now changed.
In the race, nothing changes – drivers can only use it when they are within a second of the car in front. But in practice and qualifying, although they can still use it every lap, they can do so only in the places they would be able to in the race. This will change the down force levels people will run and it may affect how Red Bull, particularly, go about their races.
When the driver opens DRS, the flap uncovers a pair of openings on the rear wing end plates. A passageway moulded inside the unusually thick end plates, creates a duct that feeds the DRS-duct system. These openings are fed with high pressure air, which has formed on top the rear wing.
In the past, their philosophy has been to run the car with lots of downforce, which increases cornering speed and helps the tyres work well, and then to use the DRS to lose that drag on the straights. Get on pole position, do one banzai lap, get out of the one-second DRS-Activation zone and you’re safe.