"Available this week is a brand-new experience for railfans — West Somerset Railway, the longest heritage line in the United Kingdom and the first official add-on to Train Sim World on Xbox one. Two new locomotives are arriving with this pack as well in the shape of the venerable Class 47 and rugged Class 09. While both are diesel powered locomotives, their employment in service and methods of operation could not be more different. Let’s take a look. British Rail Class 47 A diesel-electric locomotive, meaning a diesel generator drives electrical motors that turn the wheels." Xbox Wire says.