Red Bull's black and white RB11 hits the track in Spain

After surrendering their drivers' and constructors' crowns to Mercedes last year, Red Bull have launched the car with which they plan to fight back this season: the Renault-powered RB11, to be raced by Daniel Ricciardo and new team mate Daniil Kvyat. Featuring a striking new test livery for this week's opening Jerez session, the RB11 features a host of improvements in all areas as the team seeks to improve on 2014

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