5' Wheelbase Arch Bar Trucks
with insulated metal RP-25 contour wheelsets.
Back in the late 1800’s, this kind of truck was known as a Rigid Diamond Freight-car Truck. This one was built for the Union Tank Line and drawings of it were published in the 1895 Car Builder’s Dictionary. Prototype features included a five-foot wheelbase, 20-ton capacity journals and brake shoes that were hung from the truck.