The British Railways Standard Class 4 tank is a class of steam locomotive, one of the BR standard classes built during the 1950s. They were used primarily on commuter and outer suburban services. They were capable of reaching speeds of 75 mph (121 km/h).[1]
Quick Facts Type and origin, Power type ...
BR Standard Class 4 tank |
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80137 at Neasden MPD in March 1957. |
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Specifications |
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Configuration:
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• Whyte | 2-6-4T |
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• UIC | 1′C2′ h2t |
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Gauge | 4 ft 8+1⁄2 in (1,435 mm) |
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Leading dia. | 3 ft 0 in (0.914 m) |
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Driver dia. | 5 ft 8 in (1.727 m) |
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Trailing dia. | 3 ft 0 in (0.914 m) |
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Length | 44 ft 10 in (13.67 m) |
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Width | 8 ft 9+1⁄4 in (2.67 m) |
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Height | 13 ft 0 in (3.96 m) |
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Axle load | 17.95 long tons (18.24 t; 20.10 short tons) |
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Adhesive weight | 53.05 long tons (53.90 t; 59.42 short tons) |
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Loco weight | 86.65 long tons (88.04 t; 97.05 short tons) |
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Fuel type | Coal |
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Fuel capacity | 3.5 long tons (3.6 t; 3.9 short tons) |
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Water cap. | 2,000 imp gal (9,100 L; 2,400 US gal) |
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Firebox: | |
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• Grate area | 26.7 sq ft (2.48 m2) |
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Boiler | ABR5 |
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Boiler pressure | 225 psi (1.55 MPa) |
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Heating surface: | |
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• Firebox | 143 sq ft (13.3 m2) |
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• Tubes and flues | 1,223 sq ft (113.6 m2) |
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Superheater:
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• Heating area | 240 sq ft (22 m2) |
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Cylinders | Two, outside |
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Cylinder size | 18 in × 28 in (457 mm × 711 mm) |
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Career |
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Operators | British Railways |
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Power class | 4MT |
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Numbers | 80000–80154 |
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Axle load class | Route availability 5 |
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Withdrawn | July 1962 – July 1967 |
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Disposition | 15 preserved, remainder scrapped |
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