Build date | 1939, 1951, 1953, 1954 |
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Total produced | |
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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 | 5 ft 6 in (1,676 mm) |
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Driver dia. | 5 ft 7 in (1,702 mm) |
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Axle load | 16.25 long tons (16.51 t; 18.20 short tons) |
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Loco weight | 96.6 long tons (98.2 t; 108.2 short tons) |
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Fuel type | Coal |
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Fuel capacity | 6.5 long tons (6.6 t; 7.3 short tons) |
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Water cap. | 3,000 imp gal (14,000 L; 3,600 US gal) |
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Firebox: | |
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• Grate area | 24.6 sq ft (2.29 m2) |
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Boiler pressure | 210 psi (1.45 MPa) |
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Heating surface | 965 sq ft (89.7 m2) |
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Superheater:
| |
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• Type | AX pattern (21 A-type elements) |
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• Heating area | 230 sq ft (21 m2) |
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Cylinders | Two, outside |
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Cylinder size | 16 in × 28 in (406 mm × 711 mm) |
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Valve gear | Walschaerts |
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Performance figures |
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Tractive effort | 19,100 lbf (84.96 kN) |
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Factor of adh. | 5.68 |
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Career |
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Operators | Indian Railways |
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Number in class | 70 + 4 |
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Numbers | 13000–13073 |
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|
[2][3] |
The Indian locomotive class WM was a class of 2-6-4T tank locomotives used on 5 ft 6 in (1,676 mm) broad gauge lines in India from 1942.[2][4][5] A total of 70 of them were delivered new, and another four were converted from existing class WV engines.
The ten prototypes of the WM class, the first 30 production units, and the four WV class locomotives that were later converted to WMs, were built by Vulcan Foundry in Newton-le-Willows, Lancashire, England. The remaining 30 WM class engines were built by Robert Stephenson and Hawthorns in North East England.
Class table
Table of orders and numbers Year | Manufacturer | Serial Nos. | Qty | First Nos. | All-India Nos. | Notes |
1939 | Vulcan | 4795-4804 | 10 | 2210-2214 (EIR) 2300-2304 (GIPR) | 13000–13009 | Prototypes |
1951 | Vulcan | 6096-6125 | 30 | 9001-9030 | 13010–13039 | |
1953-1954 | Robert Stephenson and Hawthorns | 7706-7735 | 30 | 9301-9369 | 13040–13069 | |
1939 | Vulcan | 4787-4790 | 4 | 26954-26957 | 13070–13073 | Converted from WV |
See also
References
Notes
- ^ a b "Indian Railways 5 ft. 6 in. Gauge 1952 2-6-4T (WM) brochure" (PDF). Vulcan Foundry. Archived from the original (PDF) on 19 October 2013. Retrieved 11 July 2013.
- ^ "Indian Government Railways Thirty 2-6-4 Type, "WM" Class Side Tank Locomotives 5 ft. 6 in. Gauge". Vulcan Magazine. 2 (4). Vulcan Foundry: 16–17. December 1951. Archived from the original on 30 October 2013. Retrieved 11 July 2013.
- ^ Hughes 1976, p. 21.
- ^ Marshall 2009, pp. 88.
Bibliography
- Hughes, Hugh (1976). Steam in India. Truro, Cornwall: D. Bradford Barton Ltd. ISBN 0851532586.
- Hughes, Hugh (1996). Indian Locomotives: Part 4 – 1941–1990. Harrow, Middlesex: The Continental Railway Circle. ISBN 0-9521655-1-1. OCLC 35135033.
- Marshall, Lawrence G (2009). Indian Broad Gauge Steam Remembered. East Harling, Norfolk: Taverner Publications. ISBN 9781901470154.
External links
Media related to Indian locomotive class WM at Wikimedia Commons