2022 cars 'porpoising' at high speed

[godlameroso]

leclerc fp2 1.18.978 - porposing like mad on back straight from 270+ kmh. Probably the worst I've seen from ferrari so far. Curiously it doesn't seem to be affecting them much on main straight.
https://streamable.com/09za8i


verstappen fp2 1.19.223 - just getting wrecked in S3 low-mid speed corners. Might have been affected a little by the car in front
https://streamable.com/uxy91h

Great video Juzh. Ferrari porpoising from 270 - 315 kph. The RB smooth through that same section 270 - 320 kph. Ferrari onset is mid-corner so maybe some yaw effects, maybe not.

Note the engine note changes with the porpoising, indicating that there is either a drag/linear acceleration component or the driver's foot is being moved. Also not the Ferrari doesn't porpoise at the same speed on the main straight.

The porpoising is still there, but the amplitude is much lower.

[saviour stivala]

FERRARI have introduced a new upgraded diffuser which might have increased porpoising but at the same time the car also certsainly looks faster and better on its tyres.

[Shrieker]

Serious porpoising at MotoGP at COTA.
In FP2 at the 37 minutes to go mark for Jorge Martin about as bad as it gets before major consequences.

Is it not because of the bumpy circuit tho ?

[mzso]

Why doesnt the porpoising happen on high speed corners?

Ant Davidson suggested that it does if the speed is above the "porpoising speed".

I just havent seen it, has anyone noticed it?
My thoughts are that it is because of the cornering loading of the suspension

Well, Leclerc's car was "porpoising" like crazy in the fast bends in his pole lap between 300-310 km/h.
Strangely it didn't do it in the following fast section even above 310 km/h.

So maybe it's the opposite and the cars do it even more in fast bends?

[SiLo]

Ant Davidson suggested that it does if the speed is above the "porpoising speed".

I just havent seen it, has anyone noticed it?
My thoughts are that it is because of the cornering loading of the suspension

Well, in Leclerc's car was "porpoising" like crazy in the fast bends in his pole lap between 300-310 km/h.
Strangely it didn't do it in the following fast section even above 310 km/h.

So maybe it's the opposite and the cars do it even more in fast bends?

Potentially something about being in yaw that induces it more for Ferrari vs Mercedes, who seem to get it everywhere above 270kmh

[Sevach]

Ant Davidson suggested that it does if the speed is above the "porpoising speed".

I just havent seen it, has anyone noticed it?
My thoughts are that it is because of the cornering loading of the suspension

Well, in Leclerc's car was "porpoising" like crazy in the fast bends in his pole lap between 300-310 km/h.
Strangely it didn't do it in the following fast section even above 310 km/h.

So maybe it's the opposite and the cars do it even more in fast bends?

Apparently when DRS is open the back end is pushed less towards the track and reduces porposing, it can still happen but it's gonna come at much higher speeds.
In addition to that there's the combination of lateral and vertical loads that might make things much tougher.

Ferrari changed their onset from 270+ to 300+ from yesterday, In the race with less power they might just come up short of 300 on that section and be safe.

[mrluke]

At about 42 seconds as Leclerc straightens the wheel the porpoising noticeably reduces and then increases again as he starts to add lock.

[Cthomaswilson01]

When this issue first showed up, I immediately thought that the ratio of tyre diameter to wheelbase length had increased, making the car more likely to pitch. When the car pitches, the aerodynamics inherently correct, but the time constant of the correction doesn’t match the time constant of the elastic behavior of the suspension. I don’t think this can be corrected without increasing the wheelbase length.

[godlameroso]

I just havent seen it, has anyone noticed it?
My thoughts are that it is because of the cornering loading of the suspension

Well, in Leclerc's car was "porpoising" like crazy in the fast bends in his pole lap between 300-310 km/h.
Strangely it didn't do it in the following fast section even above 310 km/h.

So maybe it's the opposite and the cars do it even more in fast bends?

Apparently when DRS is open the back end is pushed less towards the track and reduces porposing, it can still happen but it's gonna come at much higher speeds.
In addition to that there's the combination of lateral and vertical loads that might make things much tougher.

Ferrari changed their onset from 270+ to 300+ from yesterday, In the race with less power they might just come up short of 300 on that section and be safe.

The rear wing being high up creates a lever arm on the chassis, combined with a rearward COG, then it makes sense when DRS is activated, that it limits the porpoising, because suddenly you're placing less load on the rear end. The center of pressure has been moved forward as well.

[Sevach]

The rear wing being high up creates a lever arm on the chassis, combined with a rearward COG, then it makes sense when DRS is activated, that it limits the porpoising, because suddenly you're placing less load on the rear end. The center of pressure has been moved forward as well.

I agree, the mechanics of why DRS helps are probably tied to that.

[KAIZEN]

If you turn the steering and run diagonally, the aerodynamics will change.
Home straights do not bounce.
The back straight is bouncing.

The Mercedes W13 porpoise is a synergistic effect of floor and body aerodynamics.


The maximum negative pressure on the floor is at the back.


Downforce that does not travel through the suspension is made with the rear drum deflector.

Only long side pods can maximize this.

Create downforce behind the diffuser and floor.
Poposing cannot be stopped.

No suspension can withstand the mighty downforce.

[johnny comelately]

Did anybody notice porpoising during the race?
I didnt, but didnt see the whole race.

[Jolle]

Did anybody notice porpoising during the race?
I didnt, but didnt see the whole race.

The Ferrari had some bounce

[mzso]

Did anybody notice porpoising during the race?
I didnt, but didnt see the whole race.

Leclerc even noted that his car was bouncing on the restart, so breaking for the first turn was difficult.

[AR3-GP]

Interesting plot in F1.com



I have no idea how well the data has been captured. https://www.formula1.com/en/latest/arti ... dlwQE.html