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PostPosted: Wed Sep 14, 2011 12:03 pm 
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Can I have a detailed explanation for this block of code? I have a few guesses on what they are.

Code:
BrakeDiscRange=(0.0254, 0.000, 1)   // disc thickness
BrakeDiscSetting=0
BrakePadRange=(0, 1, 5)             // pad type (not implemented)
BrakePadSetting=2
BrakeDiscInertia=0.715              // inertia per meter of thickness
BrakeOptimumTemp=250.0              // optimum brake temperature in Celsius (peak brake grip)
BrakeFadeRange=650.0                // temperature outside of optimum that brake grip drops to half (too hot or too cold)
BrakeWearRate=1.207e-011            // meters of wear per second at optimum temperature
BrakeFailure=(1.33e-002,7.21e-004)  // average and variation in disc thickness at failure
BrakeTorque=3000.0                  // maximum brake torque at zero wear and optimum temp
BrakeHeating=0.00060                // heat added linearly with brake torque times wheel speed (at max disc thickness)
BrakeCooling=(3.660e-002,4.630e-004)  // minimum brake cooling rate (base and per unit velocity) (at max disc thickness)
BrakeDuctCooling=1.180e-004         // brake cooling rate per brake duct setting (at max disc thickness)


I know what this is.
Code:
BrakeDiscRange=(0.0254, 0.000, 1)   // disc thickness
BrakeDiscSetting=0


I don't think I need this.
Code:
BrakePadRange=(0, 1, 5)             // pad type (not implemented)
BrakePadSetting=2


If I increase this, it takes longer to stop, right?
Code:
BrakeDiscInertia=0.715              // inertia per meter of thickness


This must be some sort of exponential slope. Are any real brakes that resilient to this sort of abuse?
Code:
BrakeOptimumTemp=250.0              // optimum brake temperature in Celsius (peak brake grip)
BrakeFadeRange=650.0                // temperature outside of optimum that brake grip drops to half (too hot or too cold)


I take it that this value increases exponentially based on the previous two values?
Code:
BrakeWearRate=1.207e-011            // meters of wear per second at optimum temperature


These values are in meters right? Seems to be about half of the initial brake disk size.
Code:
BrakeFailure=(1.33e-002,7.21e-004)  // average and variation in disc thickness at failure


Does this value change exponentially with temperature? Does it change linearly with wear?
Code:
BrakeTorque=3000.0                  // maximum brake torque at zero wear and optimum temp


This seems self-explanatory, but does it increase with brake wear? If so, what's the formula?
Code:
BrakeHeating=0.00060                // heat added linearly with brake torque times wheel speed (at max disc thickness)


This seems self-explanatory, but is it increased linearly or exponentially?
Code:
BrakeCooling=(3.660e-002,4.630e-004)  // minimum brake cooling rate (base and per unit velocity) (at max disc thickness)


This appears to be some sort of modifier.
Code:
BrakeDuctCooling=1.180e-004         // brake cooling rate per brake duct setting (at max disc thickness)

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PostPosted: Mon Sep 19, 2011 12:19 pm 
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I've asked Jim to see if he can come in and help answer your questions...

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PostPosted: Mon Sep 19, 2011 3:24 pm 
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Thanks.

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PostPosted: Mon Sep 19, 2011 11:35 pm 
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[quote="TCR_500"]If I increase this, it takes longer to stop, right?
Theoretically yes, but the contribution of the disc inertia is miniscule compared with the mass of the whole car.
Code:
BrakeDiscInertia=0.715              // inertia per meter of thickness

This must be some sort of exponential slope. Are any real brakes that resilient to this sort of abuse?
Could be, I don't know for sure, I assumed it was linear.
Code:
BrakeOptimumTemp=250.0              // optimum brake temperature in Celsius (peak brake grip)
BrakeFadeRange=650.0                // temperature outside of optimum that brake grip drops to half (too hot or too cold)

These values are in meters right? Seems to be about half of the initial brake disk size.
Yes, meters.
Code:
BrakeFailure=(1.33e-002,7.21e-004)  // average and variation in disc thickness at failure


The other questions you ask are about how the rFactor physics engine calculates some things. There is little documentation beyond the comments included in the files - sorry, I don't have the answers.


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PostPosted: Tue Sep 20, 2011 9:32 am 
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Well, for the answers you could provide, thanks.

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