based on youtube video "Vehicle Dynamics, Oversteer, Understeer Balance and More! Car Set-Up, Explained!" from Mercedes-AMG Petronas F1 TEAM channel
at 19min the sway bar functionality is being explained:
- when a car starts to corner there is a load transfer to the outside wheels, so the inner wheels transfer grip to the outside wheels
- what this graph means(20min50sec on the video) is that the amount of cornering gained in the outside wheel is a lot less then what is lost in the inside wheel, so grip is reduced.
- if there is no opposing force in the rear of the car to the weight transfer, the front inside tire will be very very loaded, and there is a possibility for the inside wheel to be off the ground.
This will generate a lot of under-steer (21min50seconds)
- if there is a strong sway bar in the back of the car increasing axle stiffness , the load transfer from the inside wheel to the outside can make the inside wheel lift, saturating the load on the outside wheel making it loose grip.
This will generate a lot of over-steer (22min15seconds)
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