This is a functional Alco RS3 locomotive, compatible with Dragon Railway.
To assemble this model, you will need 12 M2x6mm screws. To make this model run you will need 4x N20 1000 RPM motors, 2x 3mm LEDs and a control system – see official Dragon Railway models for more details.
An assembly manual is available here: https://docs.google.com/presentation/d/1NTbfd6bIZscm6-aXOA32cGl-w733jKwjyqbmQzqPul4/
This model is set up for v1 Dragon Railway couplers, available here: https://www.printables.com/model/346775-auto-coupler-v1-dragon-railway
Print more Dragon Railway: https://www.printables.com/@rambros/collections/406299
The author marked this model as their own original creation.