SD40-2 ATSF warbonnet (Unfortunately the graphics on this loco are screwed up. GP7 Duluth, Missabe & Iron Range (best as I can guess, see pictures) The quick rundown of stock is as follows: (Each minecraft block is supposedly one meter cubed.)
If you had to figure an actual gauge for these trains, it's about 2 1/2 to three feet. They are rather cutesy looking, but I have definitely been having my share of fun with my new virtual model railroad.