>>> I get the impression that the Papyrus sim doesn't take into consideration
>>> that more load on a tire generates more lateral force, but instead only
>>> model the change in the center of mass when you move weight around.
>I think they did it right - see below.
>> Last June I went to the 3 day skip barber school, had a great time and
>>learned some things. The lesson that applies here really was about weight
>>transfer, but I applied it to the F/R bias.
>[rest deleted...]
>Folks - these are two different things... In fact, weight transfer has the
>*opposite* effect of static weight distribution.
>Here's why: (For in-depth explanations see the *** to Win series by the author
>whose name I'm blanking out right now)
>- Static weight: All other things being equal, shifting the center of gravity
>of the car should have no effect on the balance - you've got increased lateral
>force required, but you've got the same amount of vertical force; should be
>a wash. What actually changes the balance is the effect of the extra weight -
>The weight deforms the tire, which in turn deforms the contact patch... As
>a result the coefficient of friction of the tire goes down... Thus, more front
>weight for a tighter car, more rear weight for a looser car.
quite following you here; a car that is set up, static, with more weight
on the front, is tighter/understeers? This is, unless I misunderstand
you, not what Carrol Smith says, and what I have experienced hundreds of
times. The end of the car that receives the most weight bias sticks
best. Jack weight to the front, you get loose. This is also known as
"rake". A formula car can be jacked up either rear or front to find a
balance. This occurs when the car handles neutrally, or in mid-corner.
Weight=increased contact patch=increased traction.
--Again, I must put my nose in; weight transfer occurs all possible
ways; sideways, forwards, backwards, upwards, but ultimately to the four
corners of the car, not only forwards/ backwards.
The name of the author is Carrol Smith, his books are:
Enginner to Win, Tune to Win, Drive to Win, and Nuts, bolts &
fasteners("screw to win"). They are worth their weight in gold!
Hope this all helps -
Matthew, Norway
--The art of flying is to avoid hitting the ground--