| NER Class D LNER Class H1 |
|
|---|---|
| Power type | Steam |
| Designer | Vincent Raven |
| Builder | NER Darlington |
| Build date | 1913,1920—1922 |
| Total produced | 45 |
| Configuration | 4-4-4T |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Leading wheel diameter |
3 ft 1 1⁄4 in (0.946 m) |
| Driver diameter | 5 ft 9 in (1.75 m) |
| Trailing wheel diameter |
3 ft 1 1⁄4 in (0.946 m) |
| Wheelbase | 34 ft 6 in (10.52 m) |
| Locomotive weight | 87.35 long tons (88.75 t) |
| Fuel type | coal |
| Fuel capacity | 4 long tons (4.1 t) |
| Water capacity | 2,000 imp gal (9,100 l; 2,400 US gal) |
| Boiler pressure | 160 psi (1.1 MPa) |
| Firegrate area | 23 sq ft (2.1 m2) |
| Heating surface: Tubes |
654.24 sq ft (60.781 m2) |
| Heating surface: Flues |
280.6 sq ft (26.07 m2) |
| Heating surface: Firebox |
124 sq ft (11.5 m2) |
| Heating surface: Total |
1,252.974 sq ft (116.4051 m2) |
| Superheater type | Schmidt |
| Cylinders | three |
| Cylinder size | 161⁄2 × 26 in (420 × 660 mm) |
| Valve gear | Stephenson |
| Tractive effort | 22,940 lbf (102.0 kN) |
| Career | North Eastern Railway, London & North Eastern Railway |
| Retired | 1931-1936 |
| Disposition | All rebuilt to LNER Class A8 |
The North Eastern Railway Class D (later London and North Eastern Railway (LNER) Class H1) was a class of 4-4-4T three-cylinder side tank steam locomotive designed by Vincent Raven in 1913.[1] They were used for rural passenger services. Forty five were built in total; a first batch of twenty, then a further twenty five after the War.[2]
Between 1931 and 1936, all of the LNER H1 class were rebuilt with a 4-6-2T wheel layout and re-classified as A8.[3] They were scrapped between 1957 and 1960.[3]
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