ASC Paper Notes
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The distance of the NSP from the front axle is determined by the following equation   Assuming the tires in the front and back are the same model, and thus the cornering stiffness values are the same, the equation simplifies down to 1/3WB. |
The location of the CG relative to the NSP determines the characteristic of the yaw response. This can be summarized in variables known as the static margin and the understeer coefficient
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When turning, the side load from before becomes the centrifugal force. With this model, the steering angle can be described with the following equation
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This, using lateral force vs slip angle data such as figure 3 (in the first expandable section), this equation can be re-written as Re-writing this equation by replacing slip angles alpha yields the following equation.
where W_f is the weight on the front axle and W_r is on the rear. This can be further simplified by introducing the understeer gradient and simplifying the lateral acceleration.
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For ASC regulations, the car must be able to withstand a 45-degree tipping table. This gives us an Fc of at least 1.
This is the equation for a 4 wheeler
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Braking Weight Transfer
Under braking, the following side view model can be used. In this scenario, the car may have 3 or 4 wheels.
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