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McLaren MP4-20 - barge board fins 28 May 2005

Adding small pointed fins to the external edge of barge boards, close to their sidepod link, has become increasingly popular since their first appearance on last year's Renault at Monaco. At the Nurburgring McLaren have introduced a triangular fin on the right-hand barge board only. This asymmetrical approach is down to the track being clockwise (as most are) - the right side of the car is the most effected by the airflow directed beneath it in corners. The new fins help limit those effects.