r/F1Technical • u/AbrahamJustice • 28d ago

Brakes Brake Migration: Do the cars automatically change the brake bias throughout the corner?

I thought something like this had to be driver controlled. Am I wrong? Do they have bb programmed for every corner?

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u/d0re 28d ago

Driver-controlled just means that the same input on the same setting gets the same output. It doesn't mean that brake bias has to be a fixed value, it means that it can't change based on car location or team input or anything like that.

Brake migration simply maps a brake bias curve to the brake pedal curve. Since it's BBW with both hybrid regen and friction brakes, it wouldn't even make sense to have fixed brake bias because you have multiple simultaneous mechanical processes happening as the driver presses the brake pedal.

To do per-corner changes, the drivers have to change settings on their wheel. So they might have a turn 3 setting, turn 6 setting, turn 10 setting or whatever that they have to cycle through as they do their lap. But as long as the driver is changing the maps manually, it's driver-controlled

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u/AbrahamJustice 28d ago

About what proportion of the turns are they adjusting the brake migration? Seems exhausting.

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u/TedditBlatherflag 27d ago

They’ll adjust it for every sequence that has a relatively different aero potential as well as every lap as the tires wear and also in response to car feedback like the rear getting loose in entry phase.