OK here it is: it is a regular four or six wheel drive, except that each side of the drive train (the blue parts) would splay out to allow driving in arcs. Depending on what angle you expanded them to, you would drive in a larger or smaller arc; If you expanded them to 45*angle, you would travel in a mid-sized arc, and if you expanded them to an 87* angle, you would travel in a very large arc.
There would be a platform suspended on casters between the sets of wheels (the red part) for mounting any mechanisms that you needed to.
The top "diagram" would be fully closed, which would allow you to drive normally; and the bottom one would be fully open, which would allow you to drive sideways.
Am I missing anything that would make this not work?
P.S. I apologize for using paint, It's all I have at the moment.
