McLaren managed to rush its Hungarian Grand Prix developments through earlier and get them on the car for the German GP weekend which helped Kevin Magnussen to qualify fourth on the grid. The rear-wing is the most noticeable change and looks rather radical when compared to rival cars. The wing features small turning vanes on the endplate (see arrow 1) to help airflow travel upwards to the wing tip, reducing the vortices that are created as the air spirals off edge and therefore reduces drag. The more unusual development though is to the main plane and flap (see arrow 2). The trailling edge of the main plane and the leading edge of the flap are serrated. This isn't a new concept and was used...
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