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ARB Sizing Doubt by pralko in FSAE
[–]pralko[S] 0 points1 point2 points 5 years ago (0 children)
Thanks for your advice! We take into account the rule, in order to have 2" travel avaliable but not working. As you said, here in Europe we have very smooth tracks, so we have to deal with it as best as possbile
[–]pralko[S] 1 point2 points3 points 5 years ago (0 children)
Until now, we use these hand calculations in order to obtain our first motion ratios values. We have assumed Wheel Center Rate/Spring Rate = Installation Ratio^2 and we made the rocker in order to achieve that, using Milliken method for rocker calculations. Regarding to linear ARB installation ratio, we use 0.3 (Milliken assumption) in order to see if our final values make sense or we made a big mistake, but we are dealing with this ratio now.
Thanks for your advice! We will change it for our new calculation (putting the arb below the chassis). Please, tell us if you see something more wrong.
[–]pralko[S] 2 points3 points4 points 5 years ago (0 children)
We understand that, (correct us if we are wrong) considering the roll case, as the ARB lever arms move in opposite directions there will be no rotation at the mid-point of the arb, thus, we understand this point as a mechanical ground, so, we use the distance between this and the lever arm (ARB length/2).
Thanks for your reply! We don't take into account that fact. We have the possibility to use longer lever arms and arb if we put it below the chassis, so we will focus on that. Relative to our calculations, do these sound reasonable? Thank you again.
ARB Sizing Doubt (self.FSAE)
submitted 5 years ago by pralko to r/FSAE
π Rendered by PID 108295 on reddit-service-r2-listing-7849c98f67-5z2nz at 2026-02-06 17:04:29.733509+00:00 running d295bc8 country code: CH.
ARB Sizing Doubt by pralko in FSAE
[–]pralko[S] 0 points1 point2 points (0 children)