- MOC-89126 was designed based on the biggest steam locomotive in history. This product was designed and authorized by Morningstrummer.
- the product is a highly realistic replica of the Big Boy steam locomotive, the biggest and most powerful steam locomotive in history. It is the only steam locomotive with 4-8-8-4 wheels in the world.
- There are two sets of driving wheels in front and rear of the train, each set of four axle eight driving wheels, and two axle four wheels without power guide wheels or slave wheels. Two sets of driving wheels have independent pistons and crank connecting rods.
- Length: 89cm, Width: 8.5cm, Hight: 13.5cm.