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Following Gresley's sudden death in 1941 Edward Thompson took over and following the end of hostilities in 1945, Thompson made a request to his works staff that a locomotive be selected for rebuild, the first of Gresley's A1 Pacifics, Great Northern was selected and became the LNER Class A1/1 specification with divided drive and separate valve ...
The Great Northern Railway Class A1 1470 Great Northern was the first of 52 A1 class locomotives.It has also represented three distinct stages in the history of the British 4-6-2 "Pacific" steam locomotives designed by Nigel Gresley for the Great Northern Railway (GNR), a constituent company of the London and North Eastern Railway before the amalgamation of 1923, for which they became a ...
The A1 prototype was classed both as an express passenger locomotive and as a rebuild of an existing locomotive out of expediency due to wartime austerity measures. [6] However, very limited amount of the original locomotive were retained in the rebuilding, such as the driving wheels, parts of the rear cartazzi, the tender frames and wheels. [6]
Union Pacific 844, the only steam locomotive never retired by a North American Class I railroad. The 4-8-4 wheel arrangement was a progression from the 4-8-2 Mountain type and, like the 2-8-4 Berkshire and 4-6-4 Hudson types, an example of the "Super Power" concept in steam locomotive design that made use of the larger firebox that could be supported by a four-wheel trailing truck, which ...
The engine worked as a two-cylinder simple on starting, changing over to compound expansion automatically. A superheater was fitted in 1914, and the engine was rebuilt as a two-cylinder simple in 1917; the new cylinders were outside, 20 by 26 in (510 by 660 mm) of the type used on class H3, driving the leading coupled wheels. It was withdrawn ...
A long block engine replacement typically requires swapping out parts from the original engine to the long block. These parts can include the oil pan, timing cover, valve covers, intake manifold, emission-control parts, carburetor or fuel injection system, the exhaust manifold(s), alternator, starter, power steering pump (if any), and air ...