| NSB Type 12 |
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| Specifications |
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Configuration:
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| • Whyte | 2-6-2T |
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| • UIC | 12a: 1'C1' T
12b/c: 1'C1' T n2v |
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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 | 3,810 mm (12 ft 6 in) |
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| Length | 11,170 mm (36 ft 8 in) |
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| Loco weight | 12a: 39.0 t (43.0 short tons; 38.4 long tons)
12b: 40.4 t (44.5 short tons; 39.8 long tons)
12c: 40.3 t (44.4 short tons; 39.7 long tons) |
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| Total weight | 12a: 46.4 t (51.1 short tons; 45.7 long tons)
12b: 49.4 t (54.5 short tons; 48.6 long tons)
12c: 50.4 t (55.6 short tons; 49.6 long tons) |
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| Fuel type | Coal |
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| Fuel capacity | 12a/b: 1.3 t (1.4 short tons; 1.3 long tons)
12c: 1.8 t (2.0 short tons; 1.8 long tons) |
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| Water cap. | 12a: 3.4 m3 (750 imp gal)
12b: 4.7 m3 (1,000 imp gal)
12c: 4.9 m3 (1,100 imp gal) |
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| Firebox: | |
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| • Grate area | 1.3 m2 (14 sq ft) |
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| Boiler pressure | 12a: 10 kg/cm2 (140 psi)
12b/c: 12 kg/cm2 (170 psi) |
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| Heating surface: | |
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| • Firebox | 80.7 m2 (869 sq ft) |
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| Cylinders | 2 |
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| Cylinder size | 12a: 406 mm × 610 mm (16.0 in × 24.0 in) |
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| High-pressure cylinder | 12b/c: 425 mm × 610 mm (16.7 in × 24.0 in) |
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| Low-pressure cylinder | 12b/c: 635 mm × 610 mm (25.0 in × 24.0 in) |
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| Performance figures |
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| Maximum speed | Forward/Reverse: 60 km/h (37 mph) |
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| Factor of adh. | 12a: 32.5 t (35.8 short tons; 32.0 long tons)
12b: 32.7 t (36.0 short tons; 32.2 long tons)
12c: 33.6 t (37.0 short tons; 33.1 long tons) |
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The NSB Type 12a, NSB Type 12b and NSB Type 12c were three steam locomotives built between 1891 and 1898 by Sächsische Maschinenfabrik and Dübs and Company for use on various railway lines in Norway. They were tank engines, which were useful so they wouldn't have to be turned around.
