Articulated lightweight piggyback railcar

An articulated railcar comprising:

• a plurality of car bodies positioned end to end with articulated connections therebetween, each car body having a skeleton structure with a depressed center sill extending centrally for the length of the car body, the center sill having goose neck projections at each end, with the ends of the center sill at a higher elevation than the remainder of the center sill,
• end sills at each end of the center sill extending perpendicularly from each side of the center sill, the end sills adjoining the articulated connections, body side bearing pads located on the underside of each of the end sills, the body side bearing pads offset longitudinally from a plane representing the end of the center sill towards the adjoining articulated connection, the end sills extending outwards on eac side to jacking positions located outside rails on which the railcar is supported,
• a single double axle truck assembly including a bolster having a center pin thereon disposed between adjacent ends of car bodies, the articulated connections including connector means on each end of each car body for engagement with the center pin on the adjacent truck assembly whereby each car body has a single point suspension at each end thereof, truck side bearings on each said truck assembly, said truck side bearings being disposed beneath said body side bearing pads with a small gap therebetween whereby, when the car body tilts, the side bearing pad engages the truck side bearing to transfer the side loading directly to the truck assembly.