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For my final project in college we built a 4-wheel steering car. We used a handle for steering, and when you pushed forward, it was crab steering so the vehicle would go sideways, like to parallel park. In the center, it would steer only the front for conventional steering, and if you pulled back, it would steer 4-wheel opposed for maximum turning radius. The design was very simple to make it work, but it might require drawing a picture to explain how it.
Minimum maybe?
Go cart slicks? Why not a utlity tire for off road apps? more GC that way for batteries, etc?
Very cool item. Just to add to complexity you might see about a way to make it go from four wheel opposing to crab steering (and back).
it does both. to crab steer, you would move the 'towing arm" to the left and turn the "T-bar" to the right.
it does both. to crab steer, you would say, move the 'towing arm" to the left and turn the "T-bar" to the right.
Initially I hadn't intended to. I did it as an exercise in learning cad. How keen are you?