Ferrari F1-75

[godlameroso]

Idk, I've been following closely and ferrari didn't seem to be having the problem yesterday and most of today. Only after lec made some suspension change did it become so apparent.
Also, Imo it's more to do with aero stall rather than some aero problem.

The plank area is still flat and can easily stall. If it does it will create turbulence and high pressure which has nowhere to go but the tunnels.

My bad, I mistook it for a wrong winglet.

I do remember Kyle engineering's vid say that it's curved inwards, towards the venturi channels and not the center floor tho.

That's true, as far as I can tell no one has the inner strake hugging the floor, it always diverges from it.

[JPower]

I think all teams will have it solved by Bahrain. Ferrari at the very least, is running the most base floor possible.

[AriaanGert]

But is it really driven by the instability on the front? It may also be a choking diffuser in the rear.

Aerodynamically speaking, choking means no more flow than what has been achieved, it doesn't mean flow stops. If choking happens it is either the throat or the inlet near the strake and bow. Those are the only places the flow can "choke" in the aerodynamic sense. Stalling is caused by flow separation and the resulting turbulence restoring atmospheric pressure.

The bow can certainly contribute to this instability because the strake the road and the bow form a duct.

Well, of course, the surface which first meets the stream can contribute to what's happening downstream.
What I noticed is that in that video (with Leclerc) the car seemed to also change the pitch, so first, the rear dropped, then the car bounces back. So I think it was rear ride height which was critical.
I guess maybe they were experimenting with the rear drop trick, which was made famous by Merc last year, but Ferrari also did it. With the new aero formula, the car may not like it so much.

I remember to have read somewhere that this drop trick isn't allowed anymore under the new rules. But there more knowledgable people here.

[timbo]

Could be! But that's easy to tune out with bump stops.

Indeed. I think this is what everybody will do.

[timbo]

I remember to have read somewhere that this drop trick isn't allowed anymore under the new rules. But there more knowledgable people here.

It's not the rear drop that isn't allowed, it's the rear suspension that was greatly simplified. Which probably exacerbates the issue.

[cheeRS]

I remember to have read somewhere that this drop trick isn't allowed anymore under the new rules. But there more knowledgable people here.

It's not the rear drop that isn't allowed, it's the rear suspension that was greatly simplified. Which probably exacerbates the issue.

Right. I think the it's that the ride height isn't allowed to change purely based on steering input, as it was able to in years past. The ride height can changed based on "normal" factors though.

[DClark]

Does anyone have the 2022 steering wheel photo?

[PlatinumZealot]

Severe separation in their bow, very detached flow, wouldn't surprise me to see that instability propagate down the floor.

But is it really driven by the instability on the front? It may also be a choking diffuser in the rear.

This. It looks like rear porpoising to me. At high speeds the team likley wants the diffuser to stall, but it seems it's a more sudden stall than before. This sudden disturbance acts on the tyres and suspension which seem to be underdamped. It is not resonance for sure. But the teams likely need special valving in the dampers to catch this or maybe tune the aero some more.

[Owen.C93]

Interesting floor edge sparking.

[f1316]

Binotto said it’s very easy to solve porpoising by raising the ride height. The issue is that they’ll get more performance by running it lower.

So from the FIA perspective: you don’t need fancy suspension, just run the car higher.

From the team’s perspective: we going to push the limits and try to find ways to have our cake and eat it.

In that footage, Ferrari were probably experimenting with settings to get the car lower without the porpoising (and that particular experiment failed), whereas later in the day they either reverted to higher settings or found a way to make it work lower.

[timbo]

but it seems it's a more sudden stall than before.

The floor generates a much bigger part of the total downforce, and also there's no step in the floor that prevented too low ride height.

[PlatinumZealot]

but it seems it's a more sudden stall than before.

The floor generates a much bigger part of the total downforce, and also there's no step in the floor that prevented too low ride height.

Since the middle plank is there it stops the floor edges from bottoming entirely but the flow can still choke.

[pierrre]

but it seems it's a more sudden stall than before.

The floor generates a much bigger part of the total downforce, and also there's no step in the floor that prevented too low ride height.

Since the middle plank is there it stops the floor edges from bottoming entirely but the flow can still choke.

unless they flex it

[timbo]

but it seems it's a more sudden stall than before.

The floor generates a much bigger part of the total downforce, and also there's no step in the floor that prevented too low ride height.

Since the middle plank is there it stops the floor edges from bottoming entirely but the flow can still choke.

Yes, though the plank is only 1 cm, and as noted above the floors can flex, there are bumps, etc.
Indycar used venturis for years, and they had stepped floor. Same on LMPs if I'm not mistaken.

[AeroDynamic]

Overhead angles of the Ferrari