This boards been dead and thought I'd give everyone another chance to pick on someone.
Though traction circles are especially meaningless in oval racing and are intended to be a way of looking at grip on cars which turn left and right, they are though a way of thinking about grip.
The idea of traction circles, is grip is a limited constant commodity and it's total use can be split into the sum of what's used for all three types of acceleration, lateral, negative and positive. That idea though still a limited way of looking at grip becomes useless once you realizes racing and the application of grip deals with using available grip. If that's understood and you are able to bring into it how an oval race car with a solid axle and stagger is able to get turning ability out of both the front and rear tires, I can move on. Trying then to mix in the concept of traction circles with oval racing and available grip.
I'm going to move to how the limited ground work I presented can be used to understand how to refine or get the most efficient use out of a right rear tire.
No matter what the limit of available grip or what type of solid axle car your racing being the fastest is getting the most grip out of your right rear tire. Yes you need both rear tires but I think everyone will agree the grip limit is set by the right rear tire because when it goes away in all cases the back goes away. I'll define getting the most grip out of the right rear tire by saying your using it at it's grip limit. It doesn't matter how much horse power you have or how heavy your car, it's going to run at it's fastest using all tires as needed, at or near their limit of grip. I'll assume my last sentence is correct to now move thinking about a right rear tire being used at it's limit of grip.
A right rear tire is only used to accelerate, decelerate and maintain maximum lateral grip.
As with each rear tire on it's own, a right rear tire can only roll straight. If it has to go in any direction other then straight it has to be forced. Though your solid axle with stagger can create rotation of the whole car from the back, most racers because of what they race not being able to get much out of stagger, mainly think of the front tires doing the turning.
If I apply traction circle thoughts to a right rear tire this is what happens.
The forcing of it to turn and it's resistance to turning because on it's own it can only roll straight, then takes away from it's available lateral grip. That means when you turn a solid axle car with the front tires you create a conflict for control of direction between the front tires and the right rear tire. The amount of conflict then directly relates per traction circles to the amount of lateral grip you have available. Reduce conflict and in all cases you will increase available lateral grip at the right rear tire. Increase conflict and in all cases you will loose lateral grip at the right rear tire.
Where on the race track those thoughts can get you faster by allowing you to use your right rear tire better is another subject for me to get picked on if I offer it. This is offered because I'm getting tired of looking at this site and seeing nothing interesting and I wanted to offer more of the same.
edit: I tried to read through what I just wrote and it's a crummy read at best.
I'm no schooled writer and it shows but I hope the thought of how any turning you get from the front tires takes away from right rear grip is there. And how any reduction in turning by the front tires, lets you get more out of your right rear for both lateral grip and acceleration.
yeah it's obvious that if you stand on the gas while turning you'll spin out or hit the wall, but there's more to it because you need your right rear tire for more then the obvious..
Edited by dirtstudent2, 03 December 2017 - 12:36 PM.