31K views · 882 reactions | The mighty steam locomotive Garratt No. 60 “Drakensberg” is in steam and heading back to the shed at the Vale of Rheidol Railway! The atmosphere is electric as we gear up for this weekend's incredible Steam Festival. You don't want to miss seeing this powerful loco in action! #SteamTrain #HeritageRailway #RailwayHistory #TrainSpotting #Wales | Cymru Rails | Facebook

A steam locomotive is a machine that propels itself and other vehicles by means of the expansion of steam. [1]: 80 It is fueled by combustible material (usually coal, oil or, rarely, wood) which is burned in the firebox to heat water in the locomotive’s boiler into steam. As a gas, the waters volume is 1,700 times greater than as a liquid! In most locomotives, the steam is admitted alternately into each end of the cylinders to move the pistons back and forth. This lateral motion (or reciprocatin