This is intriguing:
https://it.motorsport.com/f1/news/sorpr ... i/3186153/
Could Mercedes be using a passive rear wheel steering?
The interesting bits:
Mercedes has since always won: if Monza was in the ropes of the team of Brackley, we can not say the same for Singapore, a track that has always exalted the qualities of Ferrari. And now it seems to dominate also in Sochi, revealing a supremacy in the slow corners and also in those in counter-tendency.
In the Singapore grid, our Giorgio Piola had discovered the new rear brake baskets that allowed, together with the new OZ Racing rims, to avoid overheating of the rear tires, finding a perfect balance of the silver arrow which, on the contrary, has always suffered of the different behavior of the tires between the two axles.
In Sochi another piece of truth emerged: Mercedes introduced a different rear suspension. The modifications are not easily visible because they concern the kinematisms that remain hidden in the gearbox. The Stella team has a hydraulic control system, thanks to which it tries to control the shaking and the height.
But the engineers headed by James Allison seem to have managed to go further, simulating the behavior of the Mercedes in the rear as if it had the rear steering wheels. We use the term simulation because the use of this system is banned by the regulations.
The idea was developed on the Benetton B193B, an experimental single-seater that had tested the four-wheel steering with Michael Schumacher during the free practice of the Japanese GP, but were never adopted in the race.
How can the effects of steering wheels be achieved? Combining the good operation of the hydraulic suspension with the brake by wire, the differential and some engine functions.
Ferrari has lost something of engine (the FIA continues to keep an eye on the power unit of the Cavallino), but Mercedes has made a major jump from Singapore onwards, recovering a technical supremacy that the team of the Cavallino had managed to conquer with the nails in an exciting comeback. The FIA controls the Red with frequency, because it does not even take a look at the silver arrow ...