N Scale EMD F7A&B Southern Pacific #6182, 8082Details: The F Unit is probably the most recognized diesel locomotive in North American history. It was found on railroads from East to West and North to South. Similar in appearance to its predecessor, the EMD F3, the EMD F7 was a 1500 hp multi purpose locomotive. Although originally promoted as a freight hauling unit by EMD, the F7 was also used in passenger service hauling such trains such as the Santa Fe Super Chief and the Great Northern Empire