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Lotus E21 - revised 'double DRS' system 30 June 2013

Lotus unveiled their 'double DRS' device (see larger drawing) at last year's German round and continued to evaluate it during Friday sessions throughout the rest of 2012. Although the team did use the system during pre-season tests, it hadn't appeared at a 2013 race until this weekend's Silverstone round. Installed on Kimi Raikkonen's car for qualifying and the race, the device is completely passive as the rules dictate. The vertical pipe is no longer connected to the rear wing's main profile (see smaller drawing) but only blows air on to the profile when the car hits certain speeds. This reduces the downforce level and increases the car's top speed.