|Nov20-08, 11:16 PM||#86|
Shorter Stopping Distance for ultralight vehicles?
I'll quote from that book:
"A tire's coefficient of friction, when considering longitudinal forces, is measured as percentage shear rather than shear angle. The "Percentage shear vs Coefficient of Friction" graph is much the same as the "Shear Angle vs Coefficient of Friction" graph. However, the longitudinal graph generally reaches its peak faster. It has a small bubble at the peak and a short flat area before it quickly drops off."
Most of my racing and vehicle dynamics books start off with the tire performance curve because almost all the suspension design and tuning revolves around that concept.
If you want to read some more from Warren's book, look on this page:
No, I am not selling it but I consider it one of the best books out there and strongly recommend it despite the price.
Here's a site that shows the lateral and longitudinal traction combined into another important concept:
The traction circle helps drivers understand what is being demanded of them. I have several data acquisition programs that will map each part separately or together as needed. I use them when allowed (not in NASCAR) to "tune" the driver.
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