Originally Posted by
Frederik_b
Dont worry, I welcome all comments ! You mean the angle between the upper and lower links and where they intersect, right? That's a very good question and I forgot to explain.
I initially planned to have an angle (the distance between top and bottom joints on the chassis closer to each other than on the axle side) but on my first working model I immediately noticed this causes binding when rotating the axle (body roll). I never thought about it before this test, but after experiencing it I googled "four link binding" or something like that and realized it is normal with this design.
It makes sense when you think about it geometrically speaking though. The only way to achieve a freely moving axle with no binding was to make the links parallel. But I will still get somewhat of an anti squat or pro squat by playing with the ride height or chassis mounting location, if that makes any sense. I actually want the thing to plenty squat and roll
for more realism haha
On 1:1 scale cars they use bushings in the links to allow compliance and prevent damage due to binding. Maybe thats what I should do lol
I'm still learning suspension setups, but from what I've seen, link length does not effect antisquat, but effects deflection and pinion angles. When I say anti squat I'm referring to the forces from torque only that can cause the chassis to lift or lower.
0% antisquat will mean It won't adsorbed any of the torque forces. 100% in theory will adsorbed all of the torque forces. Anything under 100% will lower and anything above 100% will raise the chassis. Allso antisquat does not take into effect the weight transference under acceleration...so generally even with 100% u will get some squat from the weight transferring.
antisquat is the triangulation of the links and the location of the triangles tip compared to the vehicles instant centre line calculated with wheel base and COG.... Hope that's making sence so far....
so basically if the links intercept above the "instant centre" line it's running positive antisquat and if its below its negative antisquat.
and those links can intercept any where along that line for 100% antisquat...
and it allso shows that link length does not really effect it. And in theory the longer the links the less deflection and less variation of the pinion angle...
as I said I'm still learning, so I hope this makes sense...
