See it in action: https://youtu.be/NypJ6Lxme9E
Santa Fe - Super Chief - F-series, A unit scale model train in HO (1:87). This is the train head and it is designed to be motorized.
The bogies are not included - they are designed for the passanger cars. I put them in the complete STL for visualization only.
Passenger coach and bogey: https://www.thingiverse.com/thing:2830660