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GER Class B74
LNER Class Y4
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Departmental (Service) locomotive No. 33 at Stratford Locomotive Depot, 18 February 1961
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Specifications |
Configuration |
0-4-0T |
UIC class |
B n2t |
Gauge |
4 ft 8 1⁄2 in (1,435 mm) |
Driver diameter |
3 ft 10 in (1.168 m) |
Wheelbase |
6 ft 0 in (1.829 m) |
Length |
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Axle load |
19 long tons 1 cwt (42,700 lb or 19.4 t) |
Loco weight |
38 long tons 1 cwt (85,200 lb or 38.7 t) full |
Fuel type |
Coal |
Fuel capacity |
0 long tons 15 cwt (1,700 lb or 0.8 t) |
Water cap |
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Boiler |
LNER Diagram 40 |
Boiler pressure |
180 lbf/in2 (1.24 MPa) |
Firegrate area |
13.9 sq ft (1.29 m2) |
Heating surface |
980.5 sq ft (91.09 m2) |
• Tubes |
905.4 sq ft (84.11 m2) |
• Firebox |
75.1 sq ft (6.98 m2) |
Superheater |
None |
Cylinders |
Two, outside |
Cylinder size |
17 in × 20 in (432 mm × 508 mm) |
Valve gear |
Walschaerts |
Valve type |
Slide valves |
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Career |
Operators |
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Class |
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Power class |
BR: 0F |
Nicknames |
Pots |
Axle load class |
LNER/BR: RA 6 |
Disposition |
All scrapped |
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The GER Class B74 was a class of five 0-4-0T steam locomotives designed by Alfred John Hill for the Great Eastern Railway. They all passed to the London and North Eastern Railway at the 1923 grouping and received the LNER classification Y4.
History
These locomotives had 17-by-20-inch (432 by 508 mm) outside cylinders driving 3-foot-10-inch (1.168 m) wheels. They were built to replace the older, less powerful Class 209 (LNER Class Y5).
Table of orders and numbers
Year |
Order |
Manufacturer |
Quantity |
GER Nos. |
LNER Nos. |
LNER 1944 Nos. |
Notes |
1913 |
B74 |
Stratford Works |
1 |
227 |
7227 |
8125 |
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1914 |
B77 |
Stratford Works |
2 |
228, 226 |
7228, 7226, |
8126, 8127 |
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1921 |
A82 |
Stratford Works |
2 |
229, 210 |
7229, 7210 |
8128, 8129 |
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All were still in service at the 1923 grouping; the LNER adding 7000 to the numbers of nearly all the ex-Great Eastern locomotives, including the Class B74 locomotives. There were renumbered 8125–8129 in the 1944 renumbering scheme. At nationalisation in 1948, British Railways added 60000 to their numbers.
In 1952, number 68129 was transferred to the Service (departmental) list and renumbered 33. Withdrawals started in 1955 with 68125, with 68127 and 68128 going in 1956 and 68126 in 1957. The last to be withdrawn was 33, in 1963.
References
Notes
Bibliography
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External links
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Pre-grouping railway designs: |
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LNER designs: |
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Other designs: |
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Proposed designs: |
- P10 2-8-2T (Nov 1929)
- B 4-6-0 (Nov 1936)
- ? 4-8-2 (1939)
- Q 0-8-0 (June 1930)
- D 4-4-0 (1943)
- ? 4-8-4 (Feb 1946)
- ? 4-8-2 (Feb 1946)
- K 2-6-0 (Aug 1947)
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