flat4 wrote:
flat4 wrote:
Its possible to do variable rate manual steering racks. I found two ways to do that already.
1. use a screw to move a cam plate that actuates the steering arm. straight cam is fixed rate. curved cam will be variable rate.
2. use a bevel gear to drive a screw that then moves the steering arm. the fixed pitch screw is constant rate variable pitch screw will be variable rate.
I don't understand what you're describing. (Not that that bothers me...)
If you just want to reduce your steering wheel degrees, one of the simplest ways is to shorten the steering arms on the upright. Each inch of rack travel would then turn the wheels more.
If you really want a variable ratio of steering wheel degrees to knuckle degrees, and you're set on doing something exotic to achieve it, I'd take a look at some bizarre link geometry. We've all got an inner and outer tie rod end. Add a middle tie rod end to the mix with a floating link to the control arm. Something like a commercial door closer, maybe. I'm not smart enough to design such a thing, and I'd be terrified to drive it over 5 mph, but maybe it would be fun to design. File this one under "bad ideas".
-dave "about 1.5 posts from the 'In Theory' section and counting..." hempy
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