Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
I wanted to comment this, too.

On the loading gauge aspect:

  • The most advanced US roadrailer system (it's suitable for high speeds, at 70 mph actually higher speeds than most European low-floor solutions) is the RailRunner's Terminal Anywhere. They don't actually give the figure anywhere, but it appears that the wheeled end of their standard semi-trailers is lifted 9' (contact surfaces at c. 40' resp 49' above rail), that's about 230 mm.
  • Modalohr loading height is 207 mm.
  • Another new rotating chassis solution from Europe, Megaswing, has a loading height of 270 mm.
  • Classic RoLa is between 310 and 480 mm (the higher end of the range is the minimum height possible above the bogies, but many car types have lowered paths between the bogies).

The pros and cons of these systems also include weight:
  • Terminal Anywhere leads by leaps and bounds in train tare weight on unit length: 0.73-0.83 t/m, of which the bogie contributes 0.39-0.5 t/m. From what I can find, they even achieved this without substantial increase in semi-trailer tare weight, in spite of the need for specialised chassis with higher structural strength.
  • Necessitated by the double chassis (static and rotating parts), Modalohr cars are heavy: 1.27 t/m.
  • Megaswing cars don't have a double chassis, but have parts that need to be specially strong too: hence a tare weight by unit length of 1.22 t/m (single version) resp. 1.12 t/m (twin version).
  • Classic RoLa cars are in the range 0.85-1.1 t/m (newer ones tend to be lighter).

*Lunatic*, n.
One whose delusions are out of fashion.
by DoDo on Tue Jul 17th, 2012 at 02:55:59 PM EST
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