Tyre model[]
We will only focus on the 3 following parameters in this section : Radius (m), TorusRadius (m) and Width (°)
You have the following input parameters : width of the tyre (W), height of the tyre based on the ratio (R) and rim size (usually 17") (Rim)
Here is a tool to easily change tyres :
https://mega.co.nz/#!oAhAlIBA!a03weRZpqIN6Se7Crpa26lZwXJRNbgz0GDlcxra4A4U You need geogebra to iopen it (http://geogebra.org)
For the moment, this info is still not confirmed, but based on reverse engineering we suppose this is the tyre model used:
Radius <----> ><===== : 1/2 Tyre ^^ Torus Other view: / / / \ ^ \ | width (in °) \ v
To retrieve the width of the tyre :
- W = Sin(Width) * TorusRadius * 2
Some technical informations about tyres :
- Dunlop : http://www.dunlopracing.com/fitment.pdf
- Pirelli : http://www.motorrad-testbericht.at/magazin/pirelli/pirelli_diablo_test2013/pirelli_road_race_reifendrucktabelle.pdf
Grip[]
To limit the bike angle in GPB, you need to play with the grip parameter.
Each tyre has 3 coumpounds. Right now are 6 different Tyres available (Qualify, Soft, Softhard, HardSoft, Hard, Wet).
Usually, you have the same compound use for all 3 parts (example : soft tyre, hard tyre, ...).
The Softhard and Hardsoft tyres use different compounds on the tyre (e.g. compound 0 - soft, compound 1 - hard, compund 2 - hard). They are asymmetric tyres.
Here is the compound order:
- c0 = left compound
- c1 = center compound
- c2 = right compound
Each compound has its own properties on different track surfaces (e.g. asphalt1)
asphalt1
{
dry_grip = 0.98
wet_grip = 0.7
max_wet = 0.5
curve_type = 1
resistance_dry = 1
resistance_wet = 3
}
The lean angle is based on the lateral grip the tyres can generate.
It is based on the following paramters : compound, temperature, wear, wet, grove, marbles and road banking.
So to limit the bike angle, you have to reduce the dry (or wet) grip.