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What are the main changes for 2011?
Adjustable rear wings
Referred to as the "DRS system", the ajustable rear wing is electronically controlled by the drivers. It changes the angle of the rear wing so as to reduce downforce and increase straight line speed. The system, like KERS, is aimed at increasing overtaking. The system can be used at anytime in practice and qualifying. During the race, however, it can only be activated on a distinct part of the circuit and only if a car is under 1 second behind another one. The DRS system is deactivated as soon as the car hits the brakes.
KERS
Introduced in 2009 and dropped the following year, KERS is making a comeback. The system stores the energy wasted under braking and makes it available to the driver via a "boost" button, on a fixed amount per lap. Like the DRS system, it is optional.
Tyres
Bridgestone having withdrawn from the competition, it is now Pirellli, the Italian Manufacturer, who takes over as sole supplier. The amount of dry-weather tyre sets are reduced from 14 to 11 over the course of a race week-end. During a dry race, each car will need to use the two tyre specifications (prime and option).
Gearboxes
Gearboxes need to last for 5 race week-ends.
F-ducts and double diffusers are banned
Drivers are no longer allowed to dynamically change the car aerodynamics, which means the F-ducts are banned. The double diffusers are also banned.
107% qualifying rule
In the first phase of qualifying, drivers have to set a time within 107% of the pole position timing. Failing that, they will not be allowed to take part in the race, although stewards may allow these cars to take part in exceptional circumstances.
Team orders
The clause forbidding team orders has now been removed from the regulations.
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