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|length = 41ft
|weight = 78t 15cwt
|power = 24,300 lb|pressure = 200 lb/sq in}}4150 is a GWR 5101 class 2-6-2T locomotive, commonly referred to as a 'Large Prairie'. ==4150 in service==‘Large prairie’ Large prairie tanks were a common sight on the GWR, with more than 300 built between 1903 and 1949 to the same basic design. The locomotives were designed to haul semi-fast and suburban passenger services to tight schedules, and were also used on medium distance freight services. A number of Large Prairies the class were allocated to [[Kidderminster]] and [[Shrewsbury]] sheds and were regularly used on the Severn Valley Railway in its declining years.
The 5101 Class was an updated version by CB Collett of Churchward's 1903 3100/5100 Class. Fellow class member [[GWR Large Prairie 5164]] is an early 1930 example, while 4150 is a later post-War example. The 41xx number arose from the GWR practice, where more than 100 locomotives of one class were built, of maintaining the second number in the series and re-using older sequences of numbers where necessary. The prevalence of the Large Prairie also resulted in examples numbered 61xx, 31xx and 81xx.<ref>[http://www.greatwestern.org.uk/m_in_262.htm Great Western Archive</ref>
==4150 in service==
4150 was built at Swindon and entered service in June 1947. The first allocation was to nearby Stourbridge Junction shed (84F) where the locomotive would have worked local services towards Birmingham.
