Alakshendra wrote: ↑12 Sep 2022, 13:45
Can anyone please explain the impact of new TD specific to which area and how?
and why it affected ferrari bad way and impacted RB in a good way than?
Duchessa went into detail but fundamentally it's changed what setup compromises the F1-75 is able to adopt.
The TD not only banned the flexible plank but also introduced tighter limits on plank wear & the Aerodynamic Oscillation Metric (AOM). The AOM limits vertical accelerations, and to not breach the limit that the FIA has set for this AOM teams are having to run the car higher and stiffer. Unfortunately, this is not where the F1-75 is a happy car; it's really compromising them in terms of the slippage of the tyres in race trim & traction both in race and quali trim. More tyre slip and worse traction both contribute to increased tyre wear across race distance which is what the F1-75 is struggling most with since Spa. It's also possible Ferrari were gaining laptime using a flexible plank/floor that was beyond the intention of the rules, but there isn't much evidence for that - only evidence is Binotto had said they need to make changes to their floor to abide by TD039.
RB's car concept operates across a range of ride heights; they don't seem to be affected nearly as much as others by running with larger ground clearance. Furthermore they don't porpoise and seem to deal with bumps better than other teams, so the AOM is not so much of a problem for them. They haven't had to make a big compromise on the new metric. Furthermore it seems they may have not been exploiting anything in regard to flexible plank. So less setup compromise and potentially less rule exploitation of the plank leads to less laptime loss.
The problems that Ferrari experience relating to the TD are ameliorated by low downforce tracks as with less downforce, the F1-75 can run higher and with less downforce whilst also being a bit softer (whilst not breaching the AOM limit). The increased softness that the low downforce allows means less slip and better traction. Still, the F1-75 is not in the same window at Monza as it was prior to the TD, but not as bad. However, at high tracks with more bumps we will most likely see the opposite; the high downforce and bumpiness means triggering the AOM is easier, and so greater compromises in terms of stiffness etc must be made - likely why the car was so weak at Spa relative to the RB who seemingly did not have to compromise at all.
Then we may also speculate that some of the laptime lost is that Ferrari have run the engines more conservatively recently due to Austria and the championship being out of sight
Pair these woes for the F1-75 with the largest update to the floor the RB18 received all season at France and you can arrive at the deficit seen recently.
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