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Indian WM Type and origin Power type Steam Builder Build date 1939, 1951, 1953, 1954 Total produced 
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: 24.6 sq ft (2.29 m2 ) Boiler pressure 210 psi (1.45 MPa) Heating surface 965 sq ft (89.7 m2 ) Superheater:   • Type AX pattern (21 A-type elements)  • Heating area 230 sq ft (21 m2 ) Cylinders Two, outside Cylinder size 16 in × 28 in (406 mm × 711 mm) Valve gear Walschaerts 
[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] 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 .
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