Williams unveiled their new 2009 challenger, the FW31, at the Algarve circuit in Portugal on Monday.
Decked out in their winter test livery, the new car features the expected low, long front wing and short, high rear wing in keeping with this year's regulation changes.
KERS, the Kinetic Energy Recovery System, has also been fitted to the car, which test driver Nico Hulkenberg is set to drive for the first time later today.
Williams, whose form has slumped in recent seasons, are hoping the new car will be another step forward up the order. Last year they finished eighth in the Constructors' Championship.
Source : Planet F1