Pacejka tire coefficients

[orangutan]

For a game called VDrift, I'm thinking you may consider trying to fix beckman's method and use that after all. It should be pretty straightforward to do.

On track, it seems the driftability of the cars is enhanced, probably artificially, by beckman's combining. I plotted some curves, and sure enough, beckman's combining overestimates overall grip in pure Pacejka terms.

However, it should be noted that semi-empirical methods inherently underestimate grip on dynamic transitions...exactly where beckman's overestimation is most noticeable while driving. IOW, two wrongs may be ending up with something of a right, at least for high slip angle driving.

Putting in the more high fidelity, wrt Pacejka curves, combiners definitely results in a more wicked snap loose tire model than the beckman method. This does not mean the end result of the other combiners is high fidelity wrt dynamic reality though, so don't mistake that in thinking that I'm saying they are better than beckman's method. Just like Beckman himself basically says, this is an area for creative interpretation.