 Preserved B12/3 in LNER apple green livery. Great Eastern Railway (GER) Class S69, also known as 1500 Class, and later classified B12 by the LNER is a class of 4-6-0 steam locomotive designed for passenger work. Image File history File links No higher resolution available. ...
Image File history File links No higher resolution available. ...
The Great Eastern Railway (GER) was formed in 1862 as an amalgamation of the Eastern Counties Railway; and also with several other smaller railways: Norfolk, the Eastern Union, the Newmarket, the Harwich, the East Anglian Light and the East Suffolk; among others. ...
The London and North Eastern Railway or LNER was the second-largest of the Big Four railway companies created by the Railways Act 1921 in Britain. ...
In the Whyte notation, a 4-6-0 is a railroad steam locomotive that has a two-axle leading truck followed by three driving axles. ...
Union Pacific Big Boy #4012 at work on a cold November 29, 1941 A steam locomotive is a locomotive powered by steam. ...
Originally they were designed by S.D. Holden, but were much rebuilt, resulting in several subclasses. Stephen Dewar Holden (23 August 1870 - 7 February 1917) was a British engineer, the son of the engineer James Holden and succeeded his father as locomotive superintendent of the Great Eastern Railway in 1908, a post he held until his retirement in 1912. ...
British Railways numbers were 61501-61580 (with gaps). British Railways (BR), later rebranded as British Rail, ran the British railway system, from the nationalisation of the Big Four British railway companies in 1948 until its privatisation in stages between 1994 and 1997. ...
Sub-classes
- B12/1 Introduced 1911, GER locos with small boiler and Belpaire firebox
- B12/2 Introduced 1926, locos fitted with Lentz poppet valves (it is believed that some were rebuilt GER locos and some new LNER ones)
- B12/3 Introduced 1932, LNER rebuild of B12/1 with large boiler and round-top firebox
- B12/4 Introduced 1943, LNER rebuild of B12/1 with small boiler and round-top firebox (for Scottish lines with limited axle-load)
The poppet valves were not a great success and all the B12/2s were converted to piston valve engines between 1931 and 1934. A PRR N1s. ...
Hugo Lentz (July 21, 1859–March 21, 1944), Austrian mechanical engineer, born in South Africa, inventor of many award winning improvements of the steam engine. ...
A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. ...
A piston valve is a device used to control the motion of a fluid along a tube or pipe by means of the linear motion of a piston within a chamber or cylinder. ...
Preservation One, B12/3 number 8572, LNER 61572 has survived to preservation on the North Norfolk Railway. The North Norfolk Railway -- also known as the Poppy Line -- is a heritage railway in Norfolk, England, running between the coastal town of Sheringham and Holt which is further inland. ...
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