adrian32
I have some information on a set of tyres i would like to use in Rfactor and i have the .tir file with magic formula 5.2. The main thing would be load sensitivity formula from the magic formula?
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rogdini
Not an easy task. I'd try to get peak forces at different loads and then fit a 3-order polynomial to them, if you are lucky you should end up with something like this:
a*F^3 + b*F^2 + c*F + d
where d is DryLatLong, then LoadSens curve is:
a/d*F^3 + b/d*F^2 + c/d*F + 1
from this you can find the 3 parameters you need for LoadSens. Be careful when choosing the loads though, I believe those Pacejka models are good representations of real tyres in a limited range of load only (specified in the .tir file), you may get weird results out of them.
a*F^3 + b*F^2 + c*F + d
where d is DryLatLong, then LoadSens curve is:
a/d*F^3 + b/d*F^2 + c/d*F + 1
from this you can find the 3 parameters you need for LoadSens. Be careful when choosing the loads though, I believe those Pacejka models are good representations of real tyres in a limited range of load only (specified in the .tir file), you may get weird results out of them.
adrian32
Sorry if i am being dumb but i do not fully understand that formula. The type of values I have are;
PCX1 = 1.336400 $Shape factor Cfx for longitudinal force
This is what i thought was more relevant to the LoadSens.
PCX1 = 1.336400 $Shape factor Cfx for longitudinal force
This is what i thought was more relevant to the LoadSens.
rogdini
check this: http://ti.mb.fh-osnabrueck.de/adamshelp/mergedProjects/tire/Chapter_04_PAC2002.pdf
just out of curiosity, is it a Pirelli tyre?
just out of curiosity, is it a Pirelli tyre?