Originally Posted by doc
Just for the sake of arguing, just how much does the front or rear axels on a three axel fiver toy hauler swivel? None? Now those three axels span several feet. Yet they seem to be fine as I see them up and down the interstates and surface roads every summer, in and out of RV parks as we travel around. The three axels may be a bit shorter, but the format (no swivel pad not swivel axels on either) is the same.
How about that situation?
On a 3 axle 5ver, the center axle is the swivel point, the axles in front and back get dragged sideways a bit on turning. On a tow dolly if the wheels on the dolly are fixed, the car and dolly are a 4 wheel, 2 axle trailer with a much longer wheelbase
than the 3 axle 5ver. Either the dolly wheels need to turn or the dolly/car needs to 'bend' in the middle with either a swivel platform on the dolly or leave the steering of the car unlocked so the 'tail' can allow for turning. The geometry is really quite simple, the red wagon example is a good one.