| NSB type 21 |
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| Type and origin |
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| Power type | Steam |
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| Builder | NOHAB, Hamar, Thune |
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| Build date | 1904 - 1917 |
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| Total produced | 42 |
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| Specifications |
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Configuration:
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| • Whyte | 2-6-0 |
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| • UIC | 1'C-3 |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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| Driver dia. | 1,448 mm (4 ft 9.0 in) |
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| Wheelbase | 3,352 mm (11 ft 0 in) |
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| Length | 14,432 mm (47 ft 4.2 in) |
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| Fuel type | Coal |
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| Fuel capacity | 3 t (3.3 short tons; 3.0 long tons) |
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| Water cap. | 7.7 m3 (1,700 imp gal) |
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| Boiler pressure | 12 bar (170 psi) |
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| Cylinders | 2 |
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| Performance figures |
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| Maximum speed | Forward: 60 km/h (37 mph)
Reverse: 45 km/h (28 mph) |
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| Tractive effort | 18,560 lbf (82.56 kN) |
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| Career |
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| Operators | Norwegian State Railways |
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| Numbers | 146, 149–150, 174–183, 201–209, 224–225, 237, 251–253, 294–295, 312–315, 370–377 |
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| Withdrawn | 1971 |
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| Preserved | 5 (207, 225, 252, 376 and 377) |
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| More technical data |
The NSB type 21 was a standard gauge locomotive, suitable for lightly laid lines (10–11 tonnes axle load), introduced in 1904 for the rebuilt Bergen-Vossbanen, and was in use until NSB phased out steam in 1970–71.
