MaXyM
I want to initiate debate abut resistance for track surface materials.
Maybe some one has precise data about that.
Common question is, should resistance be set to zero for tarmac or not.
Preface
I have a friend who works as racing engineer irl. He's also an author of very well know Skoda Octavia Cup mod for rF. While building SOC mod, he put real life data into and figured that the car goes too fast.
After some verifications and calculation he managed that there must be something wrong with track resistance. After increasing it to level about 2500 car started to behave correctly (with tyres based on real data taken from manufacturer and from real car telemetry).
Additionally he did measurements of resistance of Brno track. It confirmed calculated values. New tarmac has resistance about 2250. 5 years old tarmac has about 2700.
Additionally in real life, longitudinal resistance is different than transversal one - it should be clear because of direction of particles in tarmac. This sentence is very important for next case.
Tyre characteristic
When tyre characteristic is measured, there some default resistance must be taken into account. The one is produced by measurement device: resistance of object against which tyre is tested.
Now question: is this resistance equal to tarmac resistance? Is it equal to new tarmac resistance or old one? Or what is its value?
Finally, is it correct to put whole resistance into tire characteristic while tarmac resistance is set to zero?
If we would have longitudinal and transversal resistance for tarmac and tyre, it is impossible to describe characteristic of reaction one against another putting all resistance into tyre data.
That is what make me wonder that putting tarmac resistance into tyre definition is correct for rFactor engine. Even if rF1 supports only longitudinal resistance of tarmac. But it is how all tracks are prepared (including reference ISI tracks). .
I'm curious what do you think about it (hope you understand my explanation)
best regards
PS.
We talked with Michelin but got no information about reference resistance of measurement device.
Maybe some one has precise data about that.
Common question is, should resistance be set to zero for tarmac or not.
Preface
I have a friend who works as racing engineer irl. He's also an author of very well know Skoda Octavia Cup mod for rF. While building SOC mod, he put real life data into and figured that the car goes too fast.
After some verifications and calculation he managed that there must be something wrong with track resistance. After increasing it to level about 2500 car started to behave correctly (with tyres based on real data taken from manufacturer and from real car telemetry).
Additionally he did measurements of resistance of Brno track. It confirmed calculated values. New tarmac has resistance about 2250. 5 years old tarmac has about 2700.
Additionally in real life, longitudinal resistance is different than transversal one - it should be clear because of direction of particles in tarmac. This sentence is very important for next case.
Tyre characteristic
When tyre characteristic is measured, there some default resistance must be taken into account. The one is produced by measurement device: resistance of object against which tyre is tested.
Now question: is this resistance equal to tarmac resistance? Is it equal to new tarmac resistance or old one? Or what is its value?
Finally, is it correct to put whole resistance into tire characteristic while tarmac resistance is set to zero?
If we would have longitudinal and transversal resistance for tarmac and tyre, it is impossible to describe characteristic of reaction one against another putting all resistance into tyre data.
That is what make me wonder that putting tarmac resistance into tyre definition is correct for rFactor engine. Even if rF1 supports only longitudinal resistance of tarmac. But it is how all tracks are prepared (including reference ISI tracks). .
I'm curious what do you think about it (hope you understand my explanation)
best regards
PS.
We talked with Michelin but got no information about reference resistance of measurement device.