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The Indian locomotive class XS was a class of experimental four-cylinder 4-6-2 "Pacific" type steam locomotives used on 5 ft 6 in (1,676 mm) broad gauge lines in British India, and then in post-partition Pakistan.[2][3]

Indian XS
Type and origin Power type Steam Builder Vulcan Foundry Serial number 4293–4296 Build date 1930 Total produced XS1: 2 XS2: 2
Specifications Configuration: ​  • Whyte 4-6-2  • UIC 2′C1′ h4 Gauge 5 ft 6 in (1,676 mm) Driver dia. 6 ft 2 in (1.880 m) Axle load 21.5 long tons (21.8 t; 24.1 short tons) Loco weight 108 long tons (110 t; 121 short tons) Tender weight 64.15 long tons (65.18 t; 71.85 short tons) Fuel type Coal Boiler pressure 225 psi (1.55 MPa) Cylinders Four (two inside and two outside) Cylinder size 18 in × 26 in (457 mm × 660 mm) Valve gear XS1: Caprotti XS2: Lentz
Performance figures Tractive effort 34,400 lbf (153.02 kN)
Career Operators North Western Railway (British India) North Western Railway of Pakistan Number in class XS1: 2 XS2: 2 Numbers XS1: 760, 761 XS2: 780, 781
[1][2][3]

The four members of the class were built by Vulcan Foundry in Newton-le-Willows, Lancashire, England, in 1930. They were divided into two sub-classes, XS1 and XS2, each made up of two locomotives.[1][3] Upon the partition of India in 1947, they all went to Pakistan.[2]

See also

• Rail transport in India#History
• History of rail transport in Pakistan
• Indian Railways
• Locomotives of India
• Pakistan Railways

References

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