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Indian WM
Vulcan Foundry works photo of EIR no. 2211.
Type and origin Power type Steam Builder Vulcan Foundry (40 (+4 ex WV)) Robert Stephenson and Hawthorns (30) Build date 1939, 1951, 1953, 1954 Total produced 70 new 4 ex WV
Specifications Configuration: ​  • Whyte 2-6-4T  • UIC 1′C2′h2t Gauge 5 ft 6 in (1,676 mm) Driver dia. 5 ft 7 in (1,702 mm) Axle load 16.25 long tons (16.51 t; 18.20 short tons) Loco weight 96.6 long tons (98.2 t; 108.2 short tons) Fuel type Coal Fuel capacity 6.5 long tons (6.6 t; 7.3 short tons) Water cap. 3,000 imp gal (14,000 L; 3,600 US gal) Firebox: ​  • Grate area 24.6 sq ft (2.29 m) Boiler pressure 210 psi (1.45 MPa) Heating surface 965 sq ft (89.7 m) Superheater: ​  • Type AX pattern (21 A-type elements)  • Heating area 230 sq ft (21 m) Cylinders Two, outside Cylinder size 16 in × 28 in (406 mm × 711 mm) Valve gear Walschaerts
Performance figures Tractive effort 19,100 lbf (84.96 kN) Factor of adh. 5.68
Career Operators Indian Railways Number in class 70 + 4 Numbers 13000–13073

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. 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

See also

• Rail transport in India § History
• Indian Railways
• Locomotives of India
• Rail transport in India

References

Notes

1. ^ Hughes 1996, p. 23.
2. ^ "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.
3. "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.
4. Hughes 1976, p. 21.
5. 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

v t e Broad-gauge locomotives of India
Steam	BESA designs SP SG PT HP AP HG HT IRS designs XA XB XC XD XE XF XG XH XP XT XS World War II designs AWD AWE CWD AWC IGR standard designs WP WG WL (1939) WL (1955) WM WT WU WV WW
Diesel	Mixed type WDM-1 WDM-2 WDM-2G WDM-3 WDM-3A (3C) WDM-3D (3B, 3E, 3F) WDM-4 WDM-6 WDM-7 Passenger WDP-1 WDP-2/3A WDP-4 (4B, 4D) Goods WDG-2/3A (3B,3C,3D) WDG-4 (4D) WDG-4G WDG-5 WDG-6G Shunting WDS-1 WDS-2 WDS-3/4C WDS-4 (4A, 4B, 4D) WDS-5 WDS-6 WDS-8
DC electric	Mixed type WCM-1 WCM-2 WCM-3 WCM-4 WCM-5 WCM-6 Passenger WCP-1 WCP-2 WCP-3 WCP-4 Goods WCG-1 WCG-2
AC electric	Mixed type WAM-1 WAM-2 WAM-3 WAM-4 Passenger WAP-1 WAP-2 WAP-3 WAP-4 WAP-5 WAP-6 WAP-7 Goods WAG-1 WAG-2 WAG-3 WAG-4 WAG-5 WAG-6A WAG-6B/6C WAG-7 WAG-8 WAG-9 WAGC-3/WAG-10 WAG-11 WAG-12
Dual (AC and DC) electric	Mixed type WCAM-1 WCAM-2/2P WCAM-3 Goods WCAG-1
Dual mode	Passenger WDAP-5

• Railway locomotives introduced in 1942
• Robert Stephenson and Hawthorns locomotives
• Steam locomotives of India
• Vulcan Foundry locomotives
• 2-6-4T locomotives
• 5 ft 6 in gauge locomotives
• Scrapped locomotives