Rikhart wrote:
Nice mini double diffuser they have going there in the middle, at least the opening feeding this one is part of the starter hole, unlike the mercedes one...
The diffuser slot (as is also the case with the one present on Mercedes W04) isn't actually an innovation of the 2013 car but was instead a development feature that appeared on last year's car (F2012). IIRC, it appeared as early as US GP '12, although may have been tested earlier in free practice sessions.
Here is a link to the F2012 topic with some Piola graphical representations: (bottom-most image):
http://www.f1technical.net/forum/viewto ... 09#p397509