LMS 6399 Fury

No. 6399 Fury was an unsuccessful experimental express passenger steam locomotive built in 1929 by the North British Locomotive Company in Glasgow for the London, Midland and Scottish Railway, one of several locomotives built around the world in the search for superpower steam. It was a three cylinder semi-compound with a complex three stage Schmidt boiler whose sealed ultra high pressure circuit worked at 1,400 to 1,800 psi, carried on a frame longer than the standard Royal Scot frame. On 10 February 1930, during a test run near Carstairs, an ultra high pressure tube burst and Lewis Schofield of the Superheater Company was killed. Trials at Derby until early 1934 showed significant shortcomings, and in 1935 William Stanier rebuilt it as 6170 British Legion with a conventional type 2 boiler.