Designing the Satchell Link

[boodlefoof]

Thanks Norm! You're the man! I am still learning, and this is exactly why I wanted some opinions on the design before I went out and put it together. I'm not entirely sure what is or isn't considered to be ideal yet.



The outputs I calculated are the same, I just can't (or haven't figured out how to) plot the graphs as you have, or roll steer as a percentage. The roll figures I mentioned before are in a roll with no dive. I just told it to calculate axle location change at X* roll and it spit out those numbers.

The questions that pop out at me now are these:

First, some observations about roll steer. I'm still a little confused about the roll steer curve and its effects on driving. Based on the graph, yes there is about 3% at ride height and it gets up to about 10% at 2.5'' bump. I believe the calculations are correct. So, questions...

1. Is such a roll steer curve acceptable?

I'm sure that slowing the roll steer gain in bump is a good idea, but I'm having trouble imagining a scenario where I'm in that great a rear bump while cornering... at least not with the anti-squat I am trying to build in. On the other hand, I'd hate to have enough anti-squat to lift the car enough to put me in positive roll steer coming out of a turn! Of course, the lift in the car will be limited via bump-stops as I mentioned (to probably 2-3'').

2. Will roll steer in bump have any impact on driving in a straight line? It seems that going to 2.5'' bump could only happen on major accelleration (or if I'm on a bumpy road). It seems that if roll steer is changing that much in straight bump, effecting both wheels evenly, it won't affect performance. Please, correct me if I am wrong.

3. Any tips for changing things to slow the bump steer curve? I'll toy with it some more tonight and see what I can come up with.

Second, does that anti-squat curve look good? Again, I'm not sure what is or isn't good, so is 30% per inch is ok? Again, I'll toy around with it tonight and see if I can reduce the loss while maintaining my other variables.

Third, back to the RCH. Should I aim to lower it from 10.9'' or would raising it slightly (say, up to 12'') cause problems?

Thanks again.