Cornering stifness

[Sebp]

No I mean when you are driving it, like drifters

Ah okay, erm, experience?

[Erunanethiel]

No I mean when you are driving it, like drifters

Ah okay, erm, experience?

You wont ever change the tires?
I am not sure that experience would work, ı mean it could but it still isnt linear

[Lycoming]

non-linear does not necessarily mean unpredictable.

How can you predict something that doesnt go up/down linearly?

It's not going up and down at random. in general, you can make a curve fit of the form specified here:

http://en.wikipedia.org/wiki/Pacejka

and it will often be pretty close to the data.

It's non linear but if your curve fit is good, you could consider it predictable. but sometimes there's no discernable peak and the curve just sort of tapers off and becomes constant at high slip angles.

Sometimes.

[Erunanethiel]

non-linear does not necessarily mean unpredictable.

How can you predict something that doesnt go up/down linearly?

It's not going up and down at random. in general, you can make a curve fit of the form specified here:

http://en.wikipedia.org/wiki/Pacejka

and it will often be pretty close to the data.

It's non linear but if your curve fit is good, you could consider it predictable. but sometimes there's no discernable peak and the curve just sort of tapers off and becomes constant at high slip angles.

Sometimes.

Are you sure if this is accurate? I read something like "this On the other hand, since the Pneumatic trail will never be equal to 0 or smaller than 0, you will never get a pacejka-like representation of MZ, since it will always stay positive and it will be bigger or smaller depending on you"
On this website
http://drracing.wordpress.com/2013/10/2 ... ng-torque/

By the way would you guys like to take a look at my other threads as well?

[Lycoming]

Please read the whole article, or at least the whole paragraph. Seriously.

What he's saying is that rFactor calculates pneumatic trail using lookup tables for computational efficiency. Because of they way they implement this (which is described in the paragraph you pulled that quote from), the model in rFactor cannot give you a pneumatic trail less than 0, which you can get with Pacejka. Thus, the rFactor implementation cannot fully emulate Pacejka.

It's saying the game cannot fully emulate Pacejka, it says nothing about what happens in real life. How well reality matches Pacejka is another story, one which isn't really delved into in that article.

[Erunanethiel]

Please read the whole article, or at least the whole paragraph. Seriously.

What he's saying is that rFactor calculates pneumatic trail using lookup tables for computational efficiency. Because of they way they implement this (which is described in the paragraph you pulled that quote from), the model in rFactor cannot give you a pneumatic trail less than 0, which you can get with Pacejka. Thus, the rFactor implementation cannot fully emulate Pacejka.

It's saying the game cannot fully emulate Pacejka, nothing about what happens in real life. How well reality matches Pacejka or not is another story, one which isn't really delved into in that article.

Sorry sorry.. Its past 1 am here so my brain isnt functioning properly

[Erunanethiel]

Please read the whole article, or at least the whole paragraph. Seriously.

What he's saying is that rFactor calculates pneumatic trail using lookup tables for computational efficiency. Because of they way they implement this (which is described in the paragraph you pulled that quote from), the model in rFactor cannot give you a pneumatic trail less than 0, which you can get with Pacejka. Thus, the rFactor implementation cannot fully emulate Pacejka.

It's saying the game cannot fully emulate Pacejka, it says nothing about what happens in real life. How well reality matches Pacejka is another story, one which isn't really delved into in that article.

I wonder tho, according to the Pacejka, after its past the slip angle, the lateral g decreases very slowly.
If the lateral g doesnt decrease that much with increasing slope angle (after the peak lateral G) why do drifters use techniques that are focusing on overloading the tire with slip angel in order to break the traction. I mean the decrease is very small how can it make you need less throttle to slide?

[-Felix-]

Where did you get the info, that drifters use the overload of SA to break traction? I am pretty sure they use overload in terms of longitudinal force, or in other words, a heavy right foot

[Tommy Cookers]

Exactly !!

[Erunanethiel]

Where did you get the info, that or difters use the overload of SA to break traction? I am pretty sure they use overload in terms of longitudinal force, or in other words, a heavy right foot

Almost all of them use weight transfer techniques and hand brakes

[Erunanethiel]

I still would like to hear some explanation

[Erunanethiel]

Nobody?