page_title: Brecon and Merthyr 0-6-2T locomotives
section_title: Overview of similar classes
hierarchical_section_title: Brecon and Merthyr 0-6-2T locomotives / Overview of similar classes
caption_attribution_description: English: Ex-Brecon &amp; Merthyr 0-6-2T as a Swindon Works Shunter. Before being scrapped, former South Wales lines locomotives were commonly used as Works Shunters at Swindon. Ex-GWR No. 434, seen here in April 1954, had been withdrawn in 9/53, having been built as B&amp;M No. 48 in 2/21, acquired by the GWR in 1922 as No. 1375 and renumbered 434 by 1950.
context_page_description: Brecon and Merthyr 0-6-2T locomotives were steam tank locomotives of the Brecon and Merthyr Railway including classes 36 and 45.
  The Brecon and Merthyr 36 was a class of 0-6-2T steam locomotive introduced into traffic in 1909 from a design by the Rhymney Railway's engineer Hurry Riches. There were initially four locos in the class augmented to eight in 1914. They were built by Robert Stephenson and Company and were almost identical to the successful Rhymney Railway R class excepting a round-topped boiler. When rebuilt by the GWR they acquired GWR Belpaire boilers.
  The B & M also borrowed from the Rhymney Railway P class for six more engines in two batches of three in 1915 and 1920 loosely known as the 45 class.
context_section_description: In similar vein, the Neath and Brecon Railway used the Rhymney Railway's Stephensons as a blueprint for three locomotives (known as the Neath and Brecon Stephensons) built in 1904 to the design of the Rhymney Railway M class.
  The Rhymney Railway R class and related 1904-introduced Rhymney Railway M class and 1910 Rhymney Railway A class were successful designs ideally suited to hauling heavy coal trains a relatively short distance.  In 1924, Nos 36 & 38 were reboilered by the GWR and in this form were visually almost indistinguishable from the GWR 5600 Class.  All but two of the fourteen B & M Stephensons were eventually rebuilt, the last as late as 1947.
  Thus the 36 (and larger wheeled 45 class) were designed for work on the Brecon and Merthyr, replacing smaller locomotives.  When the smaller railway companies were forcibly merged into the GWR, these 0-6-2T's were in generally good order and had proved successful. Collectively the sixty-five various permutations of the Rhymney Stephensons became the blueprint for the 200 strong 56xx class.
  The design of the 56xx followed the Rhymney/Brecon and Merthyr/Neath and Brecon designs quite closely, but adopted GWR practice as far as possible, by utilising many standardized parts. Included in Collett’s innovations was a standard number 2 boiler which was suitable for the 5600 (and the M and R class Rhymney locomotives and the B & M 36 class), complete with the traditional copper GWR safety valve casing and copper-capped chimney. Some Rhymney A and P classes were also rebuilt but used the slightly shorter standard number 10 boiler, also to good effect.
  These were  substantial sized tank engines, and weighed 66tons (62 tons after rebuilding) and were 36' 8" in length.
  They had long lives, extended by the rebuilding.  The first withdrawal was in 1947 and the last in 1954.
caption: No. 434, built as B&M No. 48 in 1921, acquired by the GWR in 1922 as No. 1375 and renumbered 434 by 1950, 25 April 1954.
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