McLaren MCL39

[Farnborough]

I've copied this over from AM thread with yt link thats significantly off axis in technical discussion I believe



Theres many errors and should therefore not be used as definitive in my view.

Starting by noting with colours identification of arms .... lists "trackod" while showing the pullrod link to suspension spring medium !!!
Next he identified the "separated" lower wishbone by pointing to one of the wishbone links and then the real "trackrod" which is the steering link and not "locating" the upright for load, just steering the upright !!!
By that presentation, I don't know if anyone can draw technical conclusion. Its significantly far away from decent analysis in many direction.

Reality though .... if one of the wishbone is split at its outer end (it's hard to see in those image) with their respective locations not stacked directly one above the other but distributed along the chassis direction, then turning the steering results in that end (top or bottom position) moving the upright axis in an arc, this pushes the upright inward or outward in relation to the chassis, then by having the steering rack as constant it will alter the toe geometry by this method.

Theres good uillstration of this in Audi (from original 8 platform early 90s) of splitting the top wishbone to do exactly this. The top wishbone separate with longitudinal separate outer locations for each. Turning the steering "folds" those two pivot along each other to not only shift the arms as it moves, but pivots the upright in firstly a tighter more confined space resulting in less "displacement" of the wheel while turned ( could be useful in F1 for less aero interferance) but also shifting steering geometry as it does this. That 8 chassis also driving front wheels for 4WD and so has useful benefit in that aspect to them.
There's other influence (weight distribution) in that example, but common observation is it lacks steering feel for driver though

Very good images those are, but not revealing with enough detail exactly where each pivot is located, making it difficult to describe the full effects of the geometry. Only a loose projection can be made in reality without that detail.

[venkyhere]

I thought the image from the scarbs article showed separation of the bottom wishbone 'vertex' , resulting in two kingpin axis-es (or axes, how do we say it?)

[SilviuAgo]

Austria RW:
-> Lower DF RW for RedBull,
-> McLaren and Ferrari same amount of downforce (low-medium)
-> Mercedes higher (medium)

[SiLo]

Austria RW:
-> Lower DF RW for RedBull,
-> McLaren and Ferrari same amount of downforce (low-medium)
-> Mercedes higher (medium)

https://pbs.twimg.com/media/GuXFhfPWgAA ... name=large

Mercedes looks lowest to me, the wing is so backed off, even if there is more surface area there.

[SilviuAgo]

It might be. I thought that the angle for Mercedes RW is not as good as for the others.
Found also this on X. We have to wait couple of hours to see it on track.

[SilviuAgo]

An interesting article regarding changes in front suspension of Lando's car vs Oscar's:

https://www.formula1.com/en/latest/arti ... KUvgHKrfhA

[Luscion]

Upgrades for AustrianGP

[f1rules]

@carpentiers_f1

[Macklaren]

Sam Collins on Sky saying that MCL39 has a new floor as well??

[SilviuAgo]

Piola: McLaren still reproduces the old configuration of the front wing. But it will likely revise the new version in the first test sessions for further testing.

I saw on F1TV also when they changed the FW on Alex car, so Giorgio might be right.

[Emag]

Piola: McLaren still reproduces the old configuration of the front wing. But it will likely revise the new version in the first test sessions for further testing.
https://pbs.twimg.com/media/GuYzgHqX0AA ... name=large
I saw on F1TV also when they changed the FW on Alex car, so Giorgio might be right.

I am fairly certain Andrea Stella already confirmed last race that the front wing was a test piece and not an upgrade. It was not their intention to race it.

[SilviuAgo]

Piola: McLaren still reproduces the old configuration of the front wing. But it will likely revise the new version in the first test sessions for further testing.
https://pbs.twimg.com/media/GuYzgHqX0AA ... name=large
I saw on F1TV also when they changed the FW on Alex car, so Giorgio might be right.

I am fairly certain Andrea Stella already confirmed last race already that the front wing was a test piece and not an upgrade. It was not their intention to race it.

Indeed. Also on F1tv was said that also on front suspension changes test will continue due to lack of finding the right balance in Canada. I think this was the reason seeing the rakes and flow-vis in today's FP1. Curious if Oscar will eventual choose the new design or he will require another approach.

[ispano6]

McLaren has made an effort to ensure parity across the two title rivals whenever it brings an update, at least in terms of giving them the option to use it.

Houldey said it was "a big combination of a front end aerodynamic system that we're upgrading", along with a change to the rear suspension geometry that means McLaren has "joined in the party" after seeing other teams implement it.

"I'm not going to go into too much detail, but you'll have seen up and down the grid that there have been a number of changes on the rear suspension of the car, so really suspension kinematics," Houldey said.

"And this event we've just added something that we think will add a little bit more stability to the rear end, mainly in corner entry."

https://www.the-race.com/formula-1/aust ... 1-problem/

[SilviuAgo]

McLaren has made an effort to ensure parity across the two title rivals whenever it brings an update, at least in terms of giving them the option to use it.

Houldey said it was "a big combination of a front end aerodynamic system that we're upgrading", along with a change to the rear suspension geometry that means McLaren has "joined in the party" after seeing other teams implement it.

"I'm not going to go into too much detail, but you'll have seen up and down the grid that there have been a number of changes on the rear suspension of the car, so really suspension kinematics," Houldey said.

"And this event we've just added something that we think will add a little bit more stability to the rear end, mainly in corner entry."

https://www.the-race.com/formula-1/aust ... 1-problem/

Hmm..interesting article. I was thinking about this part:

McLaren considered making the change that it brought to Canada at the start of the year, but was concerned it would come with a potential drawback that would be counterproductive.
The nature of suspension set-up adjustments suggests this could have been detrimental to front tyre performance if it changed how it interacted with the track surface or what load was put through the tyre.
"They had some small negatives that we didn't necessarily want to introduce at the start of the year," Houldey said of the adjustments.
"Running earlier on in the season gave us confidence that actually that wasn't going to be a problem and so we were able to introduce this change without any real concern that it wouldn't be any worse and should be better.


Is ok also at race number 10, to admit that maybe if you had been braver, the outcome of the first races could have been a little different.
It was clear that the ace Lando had on Oscar last year (if I am correct quali battle was 20-4 for Lando) vanished this year. And that MCL39 is a different car in Q3 vs MCL38. For us, as McLaren fans, the joy is the same, P1 in WCC and P1 and P2 in WDC, but at least I hope this change will bring more confidence to Lando and will stop all the hate this guy had in last months (unfortunately sometime from "McLaren fans").

Also Lando’s thoughts on the subject

[f1rules]

It was a test piece but they used the new fw, the same here

Piola: McLaren still reproduces the old configuration of the front wing. But it will likely revise the new version in the first test sessions for further testing.
https://pbs.twimg.com/media/GuYzgHqX0AA ... name=large
I saw on F1TV also when they changed the FW on Alex car, so Giorgio might be right.

I am fairly certain Andrea Stella already confirmed last race that the front wing was a test piece and not an upgrade. It was not their intention to race it.