The GER Class L77, LNER Class N7, is a class of 0-6-2T steam locomotives. They were designed by Alfred John Hill of the Great Eastern Railway and introduced in 1915. The design was perpetuated by Nigel Gresley of the LNER after the 1923 grouping. 134 were built and one example is preserved.
Quick Facts GER Class L77 LNER Class N7, Type and origin ...
GER Class L77 LNER Class N7 |
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N7/1 on a suburban train for Brentwood, c.1927 |
Type and origin |
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Power type | Steam |
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Designer | A. J. Hill |
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Builder | |
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Build date | 1915–1928 |
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Total produced | 134 |
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Specifications |
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Configuration:
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• Whyte | 0-6-2T |
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• UIC | C1 h2t |
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Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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Driver dia. | 4 ft 10 in (1.473 m) |
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Trailing dia. | 3 ft 9 in (1.143 m) |
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Wheelbase | 23 ft 0 in (7.01 m) |
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Length | 34 ft 10 in (10.62 m) over buffers |
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Axle load | 16 long tons 3 cwt (36,200 lb or 16.4 t) |
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Adhesive weight | 49 long tons 4 cwt (110,200 lb or 50 t) |
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Loco weight | 61.8–64.85 long tons (62.79–65.89 t) |
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Fuel type | Coal |
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Fuel capacity | 3 long tons 5 cwt (7,300 lb or 3.3 t) |
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Water cap. | 1,600 imperial gallons (7,270 L; 1,920 US gal) |
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Firebox: | |
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• Grate area | 17.7 sq ft (1.64 m2) |
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Boiler pressure | 180 psi (1.24 MPa) |
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Heating surface | 1,291.7 sq ft (120.00 m2) |
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Cylinders | Two, inside |
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Cylinder size | 18 in × 24 in (457 mm × 610 mm) |
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Valve gear | Walschaerts |
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Career |
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Operators | |
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Class | |
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Power class | BR: 3MT |
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Number in class | - 1 January 1923: 12
- 1 January 1948: 134
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Axle load class | LNER/BR: Route availability 5 |
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Withdrawn | 1957–1962 |
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Disposition | One preserved, remainder scrapped |
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