Southern Pacific's GS-4 4-8-4 (Northern) Daylight #4449.
This marks the 20th LEGO locomotive I have built.
This model is fully track compatible with a fully functioning 4 wheeled leading/pony truck. However, in order to do so I was forced to build her so that she swings out in curves more than any other locomotive in my collection. She currently sports 9v motors, but will eventually be rebuilt as completely Power Functions.
Give a man a fire and he'll be warm for a day.
Set a man on fire and he'll be warm for the rest of his life.