The 1989 version of Magic Formula initially did not comprise a combined slip approach. However, a respective modification had been added to the equations in HTire, making use of a simple friction ellipse approach.

The same approach can, as an option, also be used in the 2002 variant, eventually replacing the detailed combined-slip model suggested by Pacejka. This replacement might be helpful if only limited measurement data are available, which might be insufficient for a respective data fit.

See Also:

Modeling Approach