Interessante visie over de 55-mod in rF en indirect over elke klassieke mod in rF van Marko Rasannen, die blijkbaar ook mee teste aan de mod:
"To compare GPL and rfactor isn't a fair comparison. GPL aims to simulate
7 GP cars from 1967, whereas rfactor aims to be an all-purpose car
simulator / racing game. The physics model of it is already quite
complex for an average modder to understand. Still it's miles away from
the physics detail GPL is capable of. GPL achieves that by hard coding
of parameters and using shortcuts in calculation that makes things work
with the narrow range of cars it is made to simulate, but makes it
unusable for simulating, say, a modern FWD saloon car.
Having said that, there is one particular flaw in rfactor tyre physics
simulation that really turns me off. It is known fact that a tyre has a
grip budget that can be used for longitudial acceleration (acceleration
or braking) and lateral acceleration (turning, i.e. keeping the car on
track when the track turns). You can do at any give time one or the
other, or both, but when you're doing both you can't do them as much as
you could if you were doing just the other. That is to say, there is a
maximum amount of force the tyre can withhold without losing grip, and
that force is a function of its lateral and longitudial components.
This function (or relationship) of the component forces is something
that cannot be changed in rfactor. For example, if I wanted to define in
my mod how much does the lateral grip of my front tyres decrease (from
the nominal steady state value) when I'm braking at certain force (in
corner entry), as a modder I simply cannot do it!
When I was testing the 67 Eagle for Team Players (and 55 Merc before
that), one of the biggest problems I just couldn't get over with was the
massive understeer when braking. There was just no way to do a proper
trail braking. It's not only that the car went straight on if I locked
the fronts. I even used some ridiculous front brake bias values (such as
43%), I didn't lock the fronts, but still the car ploughed off the track
and the steering did nothing to help. This had something to do with the
tyre's sensitivity of vertical loads (weight transfer to the front
causes vertical load). The thing is, the sensitivity is adjustable, and
we were using reasonable values for the era. Besides, there was nothing
wrong with the braking grip. It's just that the ability to steer (the
lateral grip) pretty much vanished. And because the relationship between
the component forces cannot be changed in rfactor, that was it for me.
Another related problem (that further put me off) was that whenever you
did lose the lateral grip, there was very little you could do to get it
back. It's like the game decided that you went over the limit and shall
be punished no matter what you try to do to correct the situation.
I know this is not the issue with most of the mods for rfactor. But then
again, surprisingly many of them have "borrowed" the tyre parameters
from ISI cars, which no doubt model modern radials reasonably well.
I haven't tried the released version of 55 Merc yet, and it might just
as well be that they've found a workaround for the tyre physics "flaw".
Sorry if this sounded a bit like a rant. If anything, it just reflects
my disappointment of rfactor failing to model vintage tyres with
realistic parameters."
De originele context vind je hier :
games.groups.yahoo.com/group/GBGPLNoviceLeague/message/17814Werpt dit een ander licht over de bruikbaarheid van rF voor historische mods?
Timo
). Denk je dat rFactor 1 of LFS toen die uitkwamen niet zwaar waren voor de pc's toen?
