LMS Stanier Mogul

LMS Stanier Mogul
Preserved 42968 at Highley, Severn Valley Railway
Type and origin Power type Steam Designer William Stanier Builder LMS Crewe Works Build date 1933–1934 Total produced 40
Specifications Configuration: ​  • Whyte 2-6-0  • UIC 1′C h2 Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 3 1⁄2 in (1.003 m) Driver dia. 5 ft 6 in (1.676 m) Length 59 ft 10 3⁄4 in (18.26 m) Loco weight 69.10 long tons (70.21 t; 77.39 short tons) Tender weight 42.20 long tons (42.88 t; 47.26 short tons) Fuel type Coal Fuel capacity 5 long tons (5.1 t; 5.6 short tons) Water cap 3,500 imp gal (16,000 l; 4,200 US gal) Firebox:  • Firegrate area 27 3⁄4 sq ft (2.58 m2) Boiler LMS type 3D Boiler pressure 225 lbf/in2 (1.55 MPa) Heating surface:  • Tubes and flues 1,256 or 1,479 sq ft (116.7 or 137.4 m2)  • Firebox 155 sq ft (14.4 m2) Superheater: ​  • Heating area 185 to 244 sq ft (17.2 to 22.7 m2) Cylinders Two, outside Cylinder size 18 in × 28 in (457 mm × 711 mm) Valve gear Walschaerts Valve type Piston valves
Performance figures Tractive effort 26,290 lbf (116.94 kN)
Career Operators London, Midland and Scottish Railway → British Railways Power class 5P4F, later 5P5F, later 6P5F, later 5 Numbers LMS: 13245–13284 → 2945–2984 BR: 42945–42984 Withdrawn 1963–1967 Disposition One preserved, remainder scrapped

The London Midland and Scottish Railway (LMS) Stanier Class 5 2-6-0 or Stanier Mogul is a class of 2-6-0 mixed traffic steam locomotive. Forty were built between October 1933 and March 1934.

Although all built at Crewe Works, they were designed at Horwich Works and were developed from the Horwich Mogul, the LMS Hughes Crab 2-6-0. They had the addition of several features brought over from the Great Western Railway by newly arrived Chief Mechanical Engineer William Stanier, most notably the taper boiler. (Stanier would have been familiar with the GWR 4300 Class). In an effort to please Stanier, Horwich had designed in a GWR style top-feed cover and locomotive 13245 appeared with the feature fitted. Stanier was not at all pleased, ordering it promptly removed and replaced with the normal LMS cover.

Due to a higher boiler pressure than the Crabs the cylinders were 3" smaller in diameter and so the cylinders were able to be mounted horizontally: the only Stanier design to do so. Like the Crabs they were connected to a Fowler tender that was narrower than the locomotive. When built the first ten locomotives had no water pick-up gear fitted to their tenders.

They were initially numbered 13245–13284 (following on from the Crabs), but as standard locomotives, in the LMS 1933 renumbering scheme they were renumbered 2945–2984 in 1934 (the Crabs becoming 2700–2944). BR added 40000 to their numbers so they became 42945–42984. They were always painted black, and this was lined out except during the austere periods of the 1940s and towards the end of steam.

From the end of 1934 Stanier turned to a larger 4-6-0 for his mixed traffic class, this being the LMS Black Five Class.