peanutaxis wrote:olefud wrote:Parked on a hill nose downward, there will be more weight on the front tires than when parked on the level. The gravity force vector through the CoG will intersect the ground closer to the front wheels. Maybe that's what the driver feel through the seat of his pants.
Yep, certainly. But I'd be surprised if it were more than few centimeters, and considering the wheelbases are over 3m, it's be but a percent of two.
As the car brakes, the load transfer not only pushes the front tyres in to the track surface more but it will also make the front end settle closer to the ground. The rear will rise - even F1 cars with their stiff suspension have to deal with this effect. The forward pitching will lead to the front wing being closer to the track surface. At this point it will generate more downforce and the rear, conversely, will generate less downforce - i.e. the CoP migrates forwards under braking. So in order to prevent the rear wheels from locking you move the brake balance forward to make use of the added downforce-assisted grip at the front and lessen the chances of locked rears. Going downhill, the car will already have a slightly more forward weight balance which will add to the overall effect. Sure, it might be a small difference but these cars live and die on fractions of a percent changes...
I think Hill's comments were just typical media-style hyperbole intended to get the idea across to a non-technical audience.