Over on RC Race chat we are having a discussion on L4 front tyre diameters vs Roll Centre changes.
Anyone care to get us closer to the truth of it?
Here is the starting point but there is more in the thread.
I know how to find the roll centre on a 1/10th touring car so I can picture the changes that top and bottom link angles make.
I have no idea how to "see" this on the front end of a 1/12th using the associated reactive (L4) type suspension on my CRC . Anyne care to enlighten me?
OK ... I guess it's is obvious where the RC is on the back ... its the rear pivot ball.... then it occurs to me....
As the rear tyres get smaller the rear RC does not change.
As the front tyres get smaller we take shims out of the whole suspension and lower the RC at the front?
So rear mechanical grip due to roll moment does not change at the rear but increases at the front as the tyres get smaller yes?
I like to keep with the same set of tyres through the day if they are working for me so understanding these changes I guess is more important than if you are rotating tyres to keep things more on the level.
Do people have any opinions on tyre diameters in general? In my second year of racing, I am tending to use smaller tyres because..... my tyres are smaller!
I am now using the IRS lowered associated arms so I can get more life out of my fronts also. Do others use these things? How small do you run your fronts?
19T F3 1/12th Scale BRCA Champ. Ha!