McLaren MP4-20 - additional fins 21 August 2005
Small but important changes in Turkey, continuing development of the barge boards and lower sidepods. Small, round-edged fins are added both to the outermost edge of the car's flat bottom (lower-right arrow) and to the triangular fin connected to the barge boards (lower-left arrow). The knife-edge profile of the barge boards has also been lengthened slightly (upper-left arrow). All these changes help increase airflow efficiency underneath the car.