Mainline steam trains in Great Britain
The most famous steam locomotive operating on the British main line is the 1923 built "Flying Scotsman". After being taken into public ownership in 2004, following a decade long refit it returned to mainline service in 2016. The fastest steam locomotive ever built, the 1938 built "Mallard", was also certified for main line operation briefly in the 1980s.
2-8-4
Two prototypes were built in two-cylinder and three-cylinder versions. When tested, the two-cylinder version proved to be superior to the three-cylinder Class 114 version, and eventually twelve more two-cylinder Class 214 locomotives were built. In 1936, no. 214.13 reached a speed of , the highest speed ever attained by an Austrian steam locomotive. The regular speed limit was .
From 1938, the Deutsche Reichsbahn (DRB) designated the locomotives class 12.0. In the summer of 1939, they hauled 600 tons express trains out of Vienna over Wienerwald at a speed of , reaching over level stretches.