Matlab for tire data/suspension design

[fastback33]

Jesus, this thread is old. Basically it is going to depend on your load characteristics starting at the top and bottom points of the upright. There is no optimum angle, but obviously the further out you make the inside pick-up points the better load distribution you could possibly have.

This is where packaging comes into play. How far away could you theoretically put the inboard points? And also where you want the suspension to tie in to the chassis. Basically to keep things simple it is up to you. Play with the points in CAD a little bit see what gives you the best torsional stiffness, and what the chassis will be able to handle etc. You can make this as simple or as complex as you like. Use a spread sheet. Also, you will get better topic relevant answers on the fsae forum.

[Tim.Wright]

To geometrically fix your points you need to know a little more than the roll centre of an axis.

From a kinematic point of view you need to know at least the vsal or at least the camber gain you want, then you can calculate the vsal.

There are of course packaging and force considerations too. You can't always put the points where you want.

Milliken has a good section on suspension design that I recommend to read. It tells how to solve for the mounting points given some constraints like track, weight transfer, camber gain etc. I think its exactly what you want

Tim