ScottAndrews
Well-Known Member
I probably described that poorly...The wheel doesn't move at all. Both wheels are on the ground.Did you mean, “UP from the ground, “ and not down from the body?
In a corner with no ARB. the roll force of the body increases the downward force on the outer wheel and reduces the downward force on the inner wheel. I think we can agree on this.
With an ARB, the force on the inside wheel from the bar is up, toward the body, compressing the spring, but gravity applies a force to the body and the wheel down toward the ground (the wheel does not lift off the ground). The force to do that comes from the outside wheel. Since the bar has to compress the inner wheel spring, and the weight of the car doesn't change, the force on the outer wheel is reduced..
Seems our disconnect is really a matter of perspective...
The ARB reduces the downward force (the weight) one outside wheel, and increases the force onthe inside wheel. It does this by unloading the outer spring and transferring the load to the inner spring. Remember, the wheels never leave the ground, so this is all about increasing or decreasing the forces, not about lifting a wheel...
Another way to visualize this is this:
Consider an perfectly stiff roll bar. If the outer wheel force is increased in a corner, then that force will try to compress the spring. When it does that the (infinitely stiff) ARB compresses the inside wheel spring by the SAME AMOUNT. If the inside spring is compressed the same as the outside spring, then there is NO BODY ROLL. Since the car is now level and both springs are compressed the same, the load on each spring is the same. So load has been transferred by the bar from the outside wheel to the inside wheel.
The result is that the outer spring is compressed only half as much as it would otherwise be without the bar, and the inside spring is compressed twice as much (since it is compressed from what would have otherwise been an extended position).
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