30th June 2011, 18:53
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Senior Member
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Join Date: Sep 2008
Location: Tynedale
Age: 79
Posts: 3,698
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Wagon train.
http://www.youtube.com/watch?v=VVwTnJFRj5Q
Quote:
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Roadrailers first appeared on American railroads in the 1950s. The trailers were built with integrated railroad wheelsets that could be lowered into position when the trailer was pulled behind a train. More modern roadrailers do not include integrated railroad wheels, but ride on specially-manufactured bogies that do double-duty, serving as articulation points between multiple trailers in a train. Each truck is equipped with two fifth wheels and at one end (or both ends) of a convoy there is an adaptor truck equipped with one fifth wheel and one regular AAR Type "E" or Type "F" automatic coupler. Each semi-trailer has one king pin at each end. Because the bogie is significantly lighter than a rail flatcar or well-car, roadrailer freight trains are much lighter and therefore are more energy efficient than traditional intermodal trains.
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Last edited by G-CPTN; 30th June 2011 at 18:57.
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