RELEASED-wip Mercedes-Benz W125 0.79

[mantasisg]

The problem is slow speed grip. In retrospect, increasing DYX Refs is not the best way to fix it, but there are other parameters, most importantly lookup tables for load sensitivity -- for more slow speed grip and less mid speed grip (basically correcting what's wrong with Kunos tires).

RF2's over laborious tire model is the biggest deterrent for physics modders. Good luck with that.

Thats a good point about slow speed grip, I'll pay attention to that if I'll drive it again soon. Maybe I'll contact you for further detailed discussion, I don't know.

rF2 tires are not that laborous when you know what everythign does and understand how actual real tires work. Akthough I have never built full tire in there, but I have worked a lot with realtime parameters already. For example, regarding slow speed grip there are strightforward parameters for sliding friction vs sliding velocity.

I am afraid the reason why rF2 tires modding seems difficult for some physics guys is that they are used more to work with data, instead of observing how they work and perhaps even in some times not understanding very simple fundamentals of tire, such as for example what the hell actual slip angle means - it is effectively blending of sliding versus static friction. I rarely even hear people mentioning sliding and static friction relation, instead you will surely hear "slip angle" all over around simracing

 

[JyriK]

Thats a good point about slow speed grip, I'll pay attention to that if I'll drive it again soon. Maybe I'll contact you for further detailed discussion, I don't know.

Well, if you're interested in my physics overhaul for this car* (everything but the engine), I can send you the files. It definitely has more slow speed grip than a horse cart!

The most challenging issue was to set the rear roll center height at two feet (!), as it was in the real car. I did it with a 5-link solution. Unfortunately no camber gain for the rear is possible so I reduced camber sensitivity of the tires (not the most sophisticated solution, but hey..).

* personal use only

 

[JyriK]

...most importantly lookup tables for load sensitivity -- for more slow speed grip and less mid speed grip (basically correcting what's wrong with Kunos tires)...

Oops, working with tires for another mod, I realised I said it backwards. The problem actually is that if you set mid tyre loads correctly (ie. what I meant with mid speed grip) , then you end up with too much low and high load grip... In another words if low load grip is set correctly, there's too little medium load grip.

 

[grayman]

hello i am new but my lord this car is car is great have you ever thought about making a w25 too