Car Physics - equality of 3d shapes important, too? (Wheelbase etc.)

[iZzy]

Hi !

Currently we are discussing in our online league about slightly different handlings on different formula 1 cars, while we are using the similar performance on every car.

Normally, so i thinked, the whole car physic and handling is controlled by the car.HDV, engine.INI, damage.INI, gears.INI, headphysics.INI, susp.pm, tires.TBC - doesn't matter how the 3d shape looks or which "optical" wheelbase it has. So, if all cars are using the same physic (performance/handling), all cars are 100% the same in drivability and speed.

But it seems that this isn't right, can someone say something about this mystery? ^^

I've tested now with a "moded" Megane Tropy Cup because as all of you know this cars are ways different as an formula 1 car ... narrower wheelbase, higher and so on I've used all performance files from our formula 1 mod (car.HDV, engine.INI, damage.INI, gears.INI, headphysics.INI, susp.pm, tires.TBC) and inserted them on the Megane Trophy Mod.

Now i've started an Testday on the same Track as im actually driving in the Formula 1 and noticed that my car is oversteering ways more. Especially in long, fast corners my car looses all the grip - which makes sense, in case of that "short" wheelbase.

Would be cool if someone can say someting

 

[Niels_at_home]

The 3d model does not affect the physics, unless you have the Wheelbase and track set to zero in the HDV file. Then it will look at the 3d model for these numbers. If you enter these values manually i.e. wheelbase 3.2, track 1.4, then there are no differences in physics when using different 3d models.

 

[iZzy]

Hi Niels,

thanks for your answer

im trying a bit around with this...

Any idea how to find out the values the 3d shape is using with 3DS MAX ?

 

[olandese volante]

I reopen the discussion…

I have a mod with wheelbase=0 in the hdv (the track has a number instead)…Can I be sure that the several cars have the same physics and handling characteristics by overlapping 2 screenshots of 2 cars in the vehicle garage of rfactor?

This is what i've done: stop the camera rotation in the rfactor showroom, choose the first car, grab a screenshot; choose the second car, grab the second screenshot. Overlap them in photoshop and set the transparency of the above layer to 50%. The cars are blown out, except for the wheels that are in the exact same place: