NBR S class

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NBR S Class LNER Class J37
J37 No. 64608 at Carlisle (Citadel)1960
Type and origin Power type Steam Designer William Paton Reid Builder Cowlairs railway works North British Locomotive Co. Build date 1914-1921 Total produced 104
Specifications Configuration: ​  • Whyte 0-6-0 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 5 ft 0 in (1.524 m) Length 54 ft 5+1⁄2 in (16.599 m)[1] Loco weight 54 long tons 14 cwt (122,500 lb or 55.6 t) Fuel type Coal Boiler pressure 180 lbf/in2 (1.24 MPa) Cylinders Two, inside Cylinder size 19.5 in × 26 in (495 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 25,210 lbf (112.14 kN)
Career Operators North British Railway London and North Eastern Railway British Railways Power class NBR/LNER: 4F BR: 5F Withdrawn 1959-1966 Disposition All scrapped

The NBR S Class (LNER Class J37) was a class of 0-6-0 steam locomotive designed by William Paton Reid for freight work on the North British Railway. The engines were initially designated as B class, being a development of the standard B class locomotives designed by Reid some eight years previously, and represented the culmination of a long evolution on the NBR of powerful 0-6-0 freight engines. The new locomotives were introduced in 1914 and had superheaters, inside cylinders and piston valves operated by Stephenson valve gear.^[2]