Miatav8,MstrASE,A&P,F wrote:
STRanger7
I know what bumpsteer is.
We aim for minimum bumpsteer with the wheels on parallel paths. The offset is not a factor. Look at the arc the tie rod attachment point follows throught eh range of suspension travel, then locate the pivot point for a fixed length tie rod. This provides the correct rack width, pivot to pivot and will ultimately determine which rack to use. With fabbed adjusters, you can use any rack so don't limit yourself to what will bolt together.
If you wish to address what may be happening with so many degrees of steering input, that's higher hanging fruit and more to do with ackermann than what we describe as bumpsteer.
I think I need help checking my understanding on the two terms.
I've been thinking that Ackermann involves the kingpin axis, the mid point of the rear axle and the point where the steering arm attaches to the tie rod end.
Attachment:
Aprox Ackermann .jpg
Attachment:
Kingpin Axis.jpg
Now if I understand what I've read about Bumpsteer, what is desired for min. BS is
to have the control arms and the the tie rod point to their I.C.
with the"
ideal "tie rod length being measured from where a line connecting the steering arm end to the control arms I.C. intersects lines between top and bottom control arm brackets ,and the top and bottom points where the control arms attach to , in this case the "out-rigger assembly.
Attachment:
More BS.jpg
I hope that I just failed to explain my concerns clearly, Because I really thought I had a handle on this at least. Having shared all that , I would not have posted in the first plac if I didn't want to learn.I am grateful for any help.
Ron
PS that is supposed to read "close enough for Jazz"
, and 4 15/64"