Jon Anderson wrote:
Nothing wrong with a rigid chassis if you have enough suspension
articulation...

http://www.youtube.com/watch?v=w_F7QrR4Ur8

Even when taken to extremes.

My dad used to brag that with posi-trac and careful driving he could get
his '59 El Camino stuck in places where the four wheel drive brush
rigs (with less intrepid drivers) couldn't even get close to pull him out.

But I don't think they had one of those...

--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com