Midland Railway 1252 Class

Midland Railway 1252 class
Power type	Steam
Designer	Samuel W. Johnson
Build date	1875–1876
Total produced	30
Configuration	0-4-4T
UIC classification	B2′ n2t
Gauge	4 ft 8 1⁄2 in (1,435 mm)
Driver diameter	5 ft 6 1⁄2 in (1,689 mm)
Locomotive weight	53 tons 4 cwt (119,200 lb or 54.1 t)
Boiler pressure	140 lbf/in² (0.97 MPa)
Cylinder size	17 × 24 in (432 × 610 mm)
Valve gear	Stephenson
Tractive effort	13,810 pounds-force (61.43 kN)abbr=on

| factorofadhesion = | trainheating = | locobrakes = | locobrakeforce = | trainbrakes = | safety = | railroad = MR » LMS » BR | railroadclass = | powerclass = 1P | numinclass = | roadnumber = | officialname = | nicknames = | axleloadclass = | locale = | deliverydate = | firstrundate = | lastrundate = | retiredate = | withdrawndate = | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = }} The Midland Railway 1252 Class was a class of 30 0-4-4T locomotives built by Neilson & Co. in 1875-1876 to the design of Samuel W. Johnson. They were a development of the 6 Class. Originally numbers 1262-81 and 1252-61. Under the 1907 renumbering scheme they became 1236-65.

For this class, the Midland used nominal 5-foot-6 ¹⁄₂-inch (1,689 mm) diameter driving wheels, whereas in all later engines (starting with the 1532 Class) they used nominal 5-foot-3-inch (1,600 mm) diameter wheels. They were given the power classification 1P.

Nine, Nos 1239/46/7/9/51/2/5/60/1 were still in LMS stock at the end of 1947 and passed to British Railways (BR). BR allocated them numbers in the 58xxx series, though not all were renumbered before withdrawal. The class was extinct in 1954. None was preserved.

References

• Casserley, H.C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. pp. 27–28. ISBN 0-7110-0554-0. 

Further reading

• Bob Essery and David Jenkinson An Illustrated Review of Midland Locomotives vol 3
• Bob Essery and David Jenkinson An Illustrated History of LMS Locomotives vol 4