Article: Latest Update: Brabham Development Preview (WIP)

Tricky little guy to drive and setup. Initial turn-in has been good, but quickly turning to heavy mid-corner understeer. I loosened the diff preload quite a bit, disconnected rear ARB, and increased rear springs a couple of clicks. Car now will enter the corner properly with the rear feeling like it's following the front, as opposed to being dragged around. Traction at corner exit is also much improved.

At "Suzuka", the aero balance seemed a bit too much front-biased. Add a click of rear wing and the car is now nice to drive through 130R.
 
I thought this was being developed in conjunction with the blog. If so, when do we expect to see the blog regarding ultrachassis.
 
Added front suspensions + spindles
Added chassis flex

Waiting for some writing about this Michael Borda......
 
ucfquattroguy said:
Tricky little guy to drive and setup. Initial turn-in has been good, but quickly turning to heavy mid-corner understeer. I loosened the diff preload quite a bit, disconnected rear ARB, and increased rear springs a couple of clicks. Car now will enter the corner properly with the rear feeling like it's following the front, as opposed to being dragged around. Traction at corner exit is also much improved.

At "Suzuka", the aero balance seemed a bit too much front-biased. Add a click of rear wing and the car is now nice to drive through 130R.
Click to expand...

Thank you for the detailed feedback
 
TheGame316 said:
I thought this was being developed in conjunction with the blog. If so, when do we expect to see the blog regarding ultrachassis.
Click to expand...

gpfan said:
Added front suspensions + spindles
Added chassis flex

Waiting for some writing about this Michael Borda......
Click to expand...

We decided this time to get the car update out a little earlier than the blog, Michael's development blog should be out soon explaining the recent updates to the BT44. Thanks for your continued feedback.
 
Currently this car is a bit of a tank slapper in high speed corners, and the only way to cure it is max rear wing. My guess is that the tyres are the problem.
 
Minibull said:
Tank slapper, as in you are having the car oscillate in small slides?
Click to expand...

Yes. Various suspension and tyre adustments won't fix it. It's like the tyres loose their cohesion at max load or something.

E: On second thought, it's not about tyre load since max wing fixes it.
 
Last edited by a moderator:
Jyyka Pihtari said:
Yes. Various suspension and tyre adustments won't fix it. It's like the tyres loose their cohesion at max load or something.

E: On second thought, it's not about tyre load since max wing fixes it.
Click to expand...

You need to be very sure you keep a slight slide going, or you will have the car start to snap out of a slide, then start to point out of the corner, then start sliding again. A video would be really helpful in seeing what is going on here.

Seeing as Michael has said the tyres aren't finished, maybe it's just going to be part of the refinement. We shall see :)

It makes sense that running max wing will keep the car much more steady. The Megane is like that, where if you can control the car well, you can get away with less wing. More wing makes it much more planted, especially so in the very high speed corners.
 
The default setup has tons of mechanical grip understeer and a ton of aero oversteer. I was able to instantly shave 1.5-2.0secs at Suzuka by adding 2-clicks rear wing, more rear spring, less rear ARB, and minimum differential preload.
 
ucfquattroguy said:
...adding 2-clicks rear wing, more rear spring, less rear ARB, and minimum differential preload.
Click to expand...

Yup, that's what I have pretty much done too. The problem I'm pointing out is evident FE after the last corner of Interlagos where you accelarate through the gradual left hander to the front straight. Instead of smooth slip, the back end does sudden jerks at the limit.
 
You must log in or register to reply here.
Back
Top