Re: [Torcs-ng-devel] Supercars - need your help!

[Andrew S. <And...@la...>]

Hi Christos,

> 1) If you lower the mu factor of tyres, it may pay to increase stiffness
> quite a bit. (If it is too low, then the tyres only start to grip
> significantly after they start sliding, making the cars very hard to
> drive - if it is too high, then the tyres enter the dynamic slip regime
> very easily).

The new changes to the supercars don't change tyre mu much, however I have
slightly reduced stiffness and considerably dropped the dynamic friction.
The result is that the cars now go into & out of skids more gradually and
smoothly, rather than the behaviour of many TORCS cars - sharp, sudden skids
and spin-outs with a severe kick-back effect when the car regains grip.  At
least that's what I've seen in my experimentation, I don't know if that's
whats supposed to happen :)

> 2) simuv3 now biases the wheel forces when they are cambered with
> respect to the road, as suggested in Pajnecka's book.  This effect _is_
> quite significant in fact: and it makes the suspension type more
important.

That's really very interesting, I'll look forward to playing around with
that
and seeing what affect it has.  The 36GP cars had a _positive_ camber,
especially
on the front wheels...

> 3) the aerodynamics options use a somewhat more advanced model for the
> wings in pro mode (the wing downforce on each mode is a ...

No wings on Supercars, but again that's good to know.  You're still talking
about
simuv3 I assume?

cheers
Andrew