Join Date: Dec 2018
Location: Dallas Texas, USA
It's not just the missing material. The angle of the elements relative to the main element is quite different as well. On WTF1, someone speculated that Sauber/Alfa are collaborating with Ferrari, with whom they have a close relationship. Well, that would likely contravene the regulations (Appendix 6, I think it is, where aero testing is 'restricted').
My guess? At speed, the rotating front tires produce a 'wash' of air forward of the front tires. I have seen CFD images of this somewhere. Anyway, perhaps Sauber are testing the more efficient portions of that wing. But the angle? I think this is an effort to channel the air around to the sides and to produce vortices. In other words, it's an effort at airflow management to the middle portion of the bodywork.
Just my 2 cents....
Prior Street Cars: BMW Bavaria, 3.0 Cs, 320iS, M5; Lotus Europa Twin Cam