Instant center
From Wikipedia, the free encyclopedia
Roll center is a term used in automotive suspension designs. It is the theoretical point through which tire motion is transferred into vehicle motion. Knowing a vehicle's roll center is very useful in tuning a car's suspension, particularly in racing. Adjusting the roll center can affect the anit-squat and anti-dive characteristics of the vehicle.
This point can be found by extending two theoretical lines out from each A-arm (or control link) out colinearly. The point at which the two lines intersect in the Roll Center.
More at http://en.wikipedia.org/wiki/Roll_center
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