Ok random one this.

Came across the schedule for the Optimum G 12-day race engineering seminar on their website:

http://www.optimumg.com/documents/12%20Day...%20Contents.pdf

Can't afford it financially or time-wise, but the schedule's kind of cool in that it lays out a list of key concept and I'm tempted to use it as a structure for a bit of revision on vehicle dynamics now I'm back doing 4-wheel related things.

In the kinematics section there's a section on something called the "Bobillier compatibility method" I've googled this and the first link is the OptimumG schedule itself and the rest are nothing to do with Kinematics.

Can anyone enlighten me as to what the hell this is?

Ben

Geometer. Cheese eating surrender monkey.

"Étienne Bobillier showed no interest in mathematics" as a demonstration of selective quotation!

I'm guessing they'll be talking about instantaneous centres, and where to put the toe link.

As Greg mentioned...Definitely a very good way to find graphicaly the best way to place either a toe link or a steering rack, given the inboard and outboard points in a twin wishbone suspension system.Had used it in the early days when no computers...

A drawing used to define a three bar linkage system

see more here , and here ...sorry, in french...
Had found it initialy in "Comme construire une voiture de course", a good little book from the 6o's, giving a follow through on the design of a single seater, using examples from Matras and Alpines... was an Uni textbook I think... some bastard stole it from me so cannot make you a copy, and can't be arsed to remember how I used to do it......

Edit=..only works when top and bottom wishbones inboard mounts are paralel to CL. turning it into a 2D arrangement..