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2011 rule changes - adjustable rear wing 03 February 2011

This change is designed to increase the amount of overtaking. The driver-adjustable front wing of 2010 is gone, replaced by a driver-adjustable - but FIA regulated - rear wing. It has just two settings, ON and OFF effectively, with the ON setting increasing the gap between the main plane and the flap from 10-15mm to 50mm. This will reduce drag significantly and so improve top speed. Drivers can use the system at any time in practice and qualifying, but in the race there are restrictions. It cannot be used in the opening two laps, and then will only be made available to the driver at set points on the circuit if he is less than one second behind the car ahead. A dashboard light will notify him when the system is enabled. The system is deactivated when the driver releases the button or brakes.

FIA Technical Regulation
3.18 - Driver adjustable bodywork :
3.18.1 The incidence of the rearmost and uppermost closed section described in Article 3.10.2 may be varied whilst the car is in motion provided :
- It comprises only one component that must be symmetrically arranged about the car centre line with a minimum width of 708mm.
- With the exception of minimal parts solely associated with adjustment of the section, no parts of the section in contact with the external airstream may be located any more than 355mm from of the car centre line.
- With the exception of any minimal parts solely associated with adjustment of the rearmost and uppermost section, two closed sections are used in the area described in Article 3.10.2.
- Any such variation of incidence maintains compliance with all of the bodywork regulations.
- When viewed from the side of the car at any longitudinal vertical cross section, the physical point of rotation of the rearmost and uppermost closed section must be fixed and located no more than20mm below the upper extremity and no more than 20mm forward of the rear extremity of the area described in Article 3.10.2 at all times.
- The design is such that failure of the system will result in the uppermost closed section returning to the normal high incidence position.
- Any alteration of the incidence of the uppermost closed section may only be commanded by direct driver input and controlled using the control electronics specified in Article 8.2.
3.18.2 The adjustable bodywork may be activated by the driver at any time prior to the start of the race and, for the sole purpose of improving overtaking opportunities during the race, after the driver has completed a minimum of two laps after the race start or following a safety car period.
The driver may only activate the adjustable bodywork in the race when he has been notified via the control electronics (see Article 8.2) that it is enabled. It will only be enabled if the driver is less than one second behind another at any of the pre-determined positions around each circuit. The system will be disabled by the control electronics the first time the driver uses the brakes after he has activated the system.
The FIA may, after consulting all competitors, adjust the above time proximity in order to ensure the stated purpose of the adjustable bodywork is met.