wesley123 wrote:
Also you can see a neat cut out in the floor, guess we know where the Saubers exhaust gasses go
is that allowed by the rules?
I would guess not. Maybe it's the lights in the photo that are misleading
But even if that is indeed a small hole, it seems so tiny that I can't imagine much effect that even the high energy(over 400kph) gases of exhaust can have there, under the floor, to try help seal and accelerate air under the diffuser. It surely would help, but the dimension of it just wouldn't allow for much df to be added. Still, that's how it is. Gain a little bit of df here, a little there and, in the end, you got some quite significant advantadge over your rivals.
Let's wait for some more shots to speculate further on that
PS: If that is really a hole and other cars don't have it, then I guess it's because they can't make their exhaust plume reach that are to enhance diffuser's performance.