- Auxiliary locomotive that is indispensable for organizing Big Boy. You can enjoy the event train of Big Boy revival driving.
- Commercialize Union Pacific Railway's SD70M #4015 as it is towed by an event train.
- Reproduces a different appearance from general cargo aircraft, such as green anti-reflection coating on the nose, silver bogie, and black brake wheels.
- Stable driving is possible by adopting a power unit with a flywheel.
- Without traction tires in consideration of combined operation
- Headlights, number board lighting
- Knuckle coupler is standard equipment. Coupler trip pin included
- DCC decoder can be installed
- Attachment: Coupler trip pin