something is not right. I always thought you cant put anything on a railroad car that is longer than the rail car. reason is you cannot secure it. as if you secure something to 2 railroad cars then either the straps will break or the object will get damaged as the train goes thru a curve.
semp
What's not right is you didn't investigate how boeing (and airbus) manufactures their airframes and the great efforts they make to transport the large structures to the final assembly plant
They've paid for huge amounts of work on transportation infrastructure to ensure they can get the sub-assemblies from place to place. That apparently includes some railroad routes that have gentle enough curves for oversize cargo. In other areas they've widened roads, rebuilt bridges to make them taller, found waterway routes, etc.
