https://autoracer.it/ferrari-sf26-bahra ... va-stallo/ Ferrari's rotating rear wing
"When the flap returns to its active position before braking, the rear downforce increases rapidly, as does the diffuser's extraction. If the transition is not perfectly controlled, there could be effects on stability when entering a corner. Ferrari appears to have worked extensively on miniaturizing the actuator and integrating the system into the side supports. This suggests it is not just a wide range of movement, but a very refined management of aerodynamic moments during rotation. In summary, it is not a simple flap that opens. It is a wing that on the straight is almost 'deactivated' from an aerodynamic point of view. And it is precisely this radical nature, more than the angle achieved, that makes the technical solution extremely interesting."
Once adopted, the engineers hoped to see a gain of 5-7 km/h from the controlled stall. This also has a drawback, namely a couple of points less in downforce. The solution would bring over 1 tenth of a second per lap on straights, under certain conditions on low downforce tracks. A competitor's technician said that it is quite complicated to replicate it quickly, firstly because of the budget cap, and also because it takes a few months to optimize the aero platform, not to mention reliability.
Given the surprise and attention from the teams towards this novel solution, the head of the FIA's technical department, Nikolas Tombazis, was also asked for his opinion. 'We generally encourage solutions that can reduce drag. This is why the rules regarding DRS adjustments have changed compared to last year, giving teams more freedom. As far as we are concerned, the Ferrari solution is ok!
