Bill, I watched a fascinating YT on Australian road trains with four trailers. The first trailer was always about a third shorter than the last three.Mostly, only two joints on a B train. 5th wheel on tractor and another one at the rear of the 1st trailer (Commonly called the 'lead'), It is mounted just about the center of the last axle on the lead.
keep them both well greased and you can put them almost anywhere, backwards. Just like pushing a chain is how one guy described backing up trains.They are easy, once you get used to them.
They were full air ride, air disks on all 5 axles and a stability control system called 'anti-rollover'. It works good when you are running with a part load. 50% or less.
I don't know. The only trains I've hauled in 50 years of trucking have all been long lead and shorter pup. I've seen guys from Winnipeg with the short lead and longer pup. But one would think that the tail would be wagging the dog. We in Ontario never want the pup heavier than the pup. The extra weight on the pup gives you the sensation of being pushed all over the road. NOT fun.Bill, I watched a fascinating YT on Australian road trains with four trailers. The first trailer was always about a third shorter than the last three.
I'm guessing that makes whole rig turn better/tighter?