Roll Center

[jordi26jlr]

Hello everyone,
I have a few days trying to reason about questions about the vehicle's roll center. And I'd like to know:
Let's build a car from 600 kilos approximate. That is a pretty light car. And it will drive. As I have understood and here are my questions:
The RC has to go forward always lower than the rear? (We found cases such as CM that there are designs that do not have to go this way)
The RC can be negative?
In case you have to go positive:
The RC has to always go as low as possible. That is, all you can hit the ground? Then when we bum-steer in a dynamic course we put the negative RC, that interested?
I hope I have explained the clearest possible because it is a somewhat complicated issue. All this we analyze analyzer geometries.


PD: Sorry for my English


Regards, Jordi

 

[NormPeterson]

The geometric roll center is a virtual point, not a hard pivot, so you could place it above, below, or at ground level.

Keep in mind that this roll center will move around some as the suspension compresses and extends (and the various links go into different inclinations). It is entirely possible for a geo-RC to start out above grade but move down to and below grade as the suspension moves into 'bump'.


Norm