A 1960s experiment to stuff gas-turbines inside locomotives with the deafening sound similar to a 60s turbojet fighter taxiing was a brave choice for UP to fool around with. It mostly ran across Nevada, California, Utah, and Wyoming.
Read more about the real ones at https://utahrails.net/up/up-turbines-at-the-end.php
The model is an HO scale Scale Trains "Museum Quality" edition, and is unbelievably spectacular. My friend came by to run it on the layout yesterday and it was literally a blast.