union pacific 4-8-8-4 big boy

Union Pacific 4-8-8-4 big boy with coal car.  The locomotive is designed for a 44mm motorized chassis.  The front boggie of the motorized chassis is hidden from view by the first set of 8 wheels.  some of the boggie's embossed detail may need to be sanded off for additional movement.  The front of the locomotive is designed to articulate.  A separate boggie will need to be installed at the front of the locomotive.

The coal car can be motorized with a 35.5 mm motorized chassis.