NER Class R
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| NER Class R LNER Class D20 |
|
|---|---|
| Power type | Steam |
| Designer | Wilson Worsdell |
| Builder | NER Gateshead |
| Build date | 1899-1907 |
| Total produced | 60 |
| Configuration | 4-4-0 |
| Gauge | 1,435 mm (4 ft 8 1⁄2 in) |
| Leading wheel diameter |
4 ft 0 in (1.22 m) |
| Driver diameter | 6 ft 10 in (2.08 m) |
| Wheelbase | 23 ft 9 in (7.24 m) engine 12 ft 8 in (3.86 m) tender 45 ft 10 3⁄4 in (13.989 m) total |
| Axle load | 19.8 long tons (20.1 t) |
| Locomotive weight | D20/1: 54.1 long tons (55.0 t) D20/2: 55.45 long tons (56.34 t) |
| Tender weight | 41.2 long tons (41.9 t) |
| Locomotive & tender combined weight |
D20/1: 95.3 long tons (96.8 t) D20/1: 96.65 long tons (98.20 t) |
| Fuel type | coal |
| Boiler | 4 ft 9 in (1.45 m) diameter |
| Boiler pressure | 200 psi (1.4 MPa) later reduced to 160 psi (1.1 MPa) |
| Firegrate area | 20 sq ft (1.9 m2) |
| Heating surface: Tubes |
638.7 sq ft (59.34 m2) |
| Heating surface: Flues |
292 sq ft (27.1 m2) |
| Heating surface: Firebox |
139 sq ft (12.9 m2) |
| Heating surface: Total |
1,318.7 sq ft (122.51 m2) |
| Superheater area | 204 sq ft (19.0 m2) |
| Cylinders | two inside |
| Cylinder size | 19 × 26 in (480 × 660 mm) |
| Valve gear | Stephenson |
| Tractive effort | 17,025 lbf (75.73 kN) later reduced to 15,567 lbf (69.25 kN) |
| Career | North Eastern Railway, London and North Eastern Railway, British Railways |
| Power class | BR: 2P |
| Retired | 1943-1957 |
| Disposition | None preserved |
The NER Class R (later, LNER Class D20) was a class of 4-4-0 steam locomotive, designed by Wilson Worsdell for the North Eastern Railway. They passed to the London and North Eastern Railway (LNER) in 1923. In 1936, some were rebuilt with long-travel piston valves and classified D20/2. The unrebuilt locomotives were re-classified D20/1.
Contents |
[edit] Numbering
Forty-six D20/1 and three D20/2 locomotives passed to British Railways in 1948 and they were numbered 62340-62397 (with gaps).
[edit] Preservation
The last D20 was withdrawn in 1957 and none were preserved.
[edit] Sources
- Ian Allan ABC of British Railways Locomotives, 1948 edition, part 4, page 19
[edit] External links
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