NER Class D

This article is about the 4-4-4T class. For the 2-4-0 class, see NER Class F.

NER D Class LNER H1 Class
Type and origin Power type Steam Designer Vincent Raven Builder NER Darlington Build date 1913, 1920—1922 Total produced 45
Specifications Configuration: ​  • Whyte 4-4-4T Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Leading dia. 3 ft 1+1⁄4 in (0.946 m) Driver dia. 5 ft 9 in (1.753 m) Trailing dia. 3 ft 1+1⁄4 in (0.946 m) Wheelbase 34 ft 6 in (10.52 m) Width 8 ft 6 in (2.59 m) Height 13 ft 0+1⁄2 in (3.98 m) Adhesive weight 39.75 long tons (40.39 t; 44.52 short tons) Loco weight 87.35 long tons (88.75 t; 97.83 short tons) Fuel type Coal Fuel capacity 4 long tons (4.1 t; 4.5 short tons) Water cap. 2,000 imp gal (9,100 L; 2,400 US gal) Firebox: ​  • Grate area 23 sq ft (2.1 m2) Boiler pressure 160 psi (1.1 MPa) Heating surface: ​  • Firebox 124 sq ft (11.5 m2)  • Tubes 654.24 sq ft (60.781 m2)  • Flues 280.6 sq ft (26.07 m2)  • Total surface 1,252.974 sq ft (116.4051 m2) Superheater: ​  • Type Schmidt  • Heating area 194.13 sq ft (18.035 m2) Cylinders three Cylinder size 16+1⁄2 in × 26 in (419 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 20,928 lbf (93.09 kN) Factor of adh. 4.25
Career Operators North Eastern Railway (UK), London & North Eastern Railway Class NER D Class, LNER H1 Class Numbers 2143-2162, 1517-1520, 1523, 1528, 1529, 1531, 1499, 1501-1503, 1524-1527, 1327, 1329, 1330, 1521, 1326, 1328, 1500, 1522, and 1530 Retired 1931-1936 Disposition All rebuilt to LNER A8 Class

The North Eastern Railway D Class (later London and North Eastern Railway (LNER) H1 Class) was a class of 4-4-4T three-cylinder side tank steam locomotive designed by Vincent Raven in 1913. They were used for rural passenger services. Forty-five were built in total. The first batch of twenty was outshopped between October 1913 and April 1914 (Nos. 2143 to 2162). After World War I, a further twenty-five locomotives were built. These consisted of eight members outshopped between May and June 1920, twelve between June to December 1921, three between February and March 1922, and two between May 1922 (1522 and 1530).

Between 1931 and 1936, all of the LNER H1 class were rebuilt with a 4-6-2T wheel layout and re-classified as A8. They were scrapped between 1957 and 1960.