R30531 RailRoad Class 66 Freightliner 66601 'Freightliner 60' Diesel LocomotiveFirst introduced in 1998, the Class 66 revolutionised the rail freight sector in Britain and have become the most prolific type for heavy freight work. In 2000, a new 66 6 sub class was created with a lower gear ratio version enabling heavier trains to be hauled, albeit at slower speeds. A total of 25 were put into service by Freightliner, numbered 66601 625 and some of these have since moved overseas for use with Freightliner Poland. Used mainly on