Le 2012/04/11 04:55, scott a écrit :
>>> Look at cars where speed above 70MPH actually matters. Like, say, race
>>> cars. They've gotten much faster.
>>
>> Pfft. Every time the engineers find a way to make the cars faster, the
>> FIA finds a way to make them go slower again. :-P
>
> http://en.wikipedia.org/wiki/List_of_fastest_production_cars
>
> The problem with top speed is that it depends on the cube root of power,
> so you need huge increases of power to get any significant top speed
> improvements.
>
> The bigger improvements have been in cornering speeds and braking
> ability (both in racing cars and road cars). If you look at videos of
> old F1 races there are many corners where they used to brake and change
> gear whereas in today's cars they just run flat out (Eau Rouge at Spa is
> the classic one, or 130R at Suzuka). Tyres, suspension and aerodynamics
> have improved vastly to make such things possible. Even in your road car
> braking distances have vastly reduced due to tyre, suspension and brake
> design (not ABS, that only really helps if you want to steer and brake
> or it's wet).

ABS is very often bad. Most are all/nothing affairs taking only one 
sample per wheel rotation that can jerk you around and make you loose 
controll. In some cases, the brake pedal will shake and hit your foot 
real hard, even to the point of causing some injuries...

A real good ABS must be progressive, take MANY samples per rotation, 
gradualy reduce the breaking power as needed acording to the breaking 
related torque and wheel load. In short, find the limit of adherance and 
stay around it untill you stop.




Alain

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