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clutch mod proposal
I had a look at the clutch, and I am not very happy about the way it's simulated in vdrift.
1. Right now it looks like a kind of linear torque-converter(depends on rpm delta).
2. I have no idea where to get realistic parameters from(sliding friction, radius, area, max-pressure).
A (friction)clutch is a torque transfer device. So it's obvious to describe it by its torque capacity. The maximum torque it's able to transfer.
To account for clutch wear/slip the clutch torque capacity should be at least 1.25 of engine peak torque. If you've got a lot of grip(awd, slicks) 1.5. One usually stays below 2.0 to avoid engine/gearbox damages.
My proposal is to use torque capacity as clutch parameter.
For the 911(CS) instead of:
[ clutch ]
sliding = 0.27
radius = 0.1
area = 0.75
max-pressure = 11079.26
We would have:
[ clutch ]
torque-capacity = 350 # engine peak torque * 1.4
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