Drag reduction system

drag reduction system (DRS) is a form of driver-adjustable bodywork aimed at reducing aerodynamic drag in order to increase top speed and promote overtaking. It is an adjustable rear wing of the car, which moves in response to driver commands. DRS often comes with conditions, such as the pursuing car must be within a second (when both cars cross the detection point) for DRS to be activated. In Formula One, the DRS opens an adjustable flap on the rear wing of the car, in order to reduce drag, thus giving a pursuing car an overtaking advantage over the car in front. The FIA estimate the speed increase to be between 10–12 km/h by the end of the activation zone. When the flap is closed it increases downforce, giving better cornering. The device can only be used during a race after two racing laps have been completed, and when the pursuing car enters a designated "activation" zone defined by the FIA.