NSB Class XXI

Specifications
Configuration	2-6-2T
UIC class	1′C1′t n2
Gauge	3 ft 6 in (1,067 mm)
Driver diameter	36 in (914.4 mm)
Minimum curve	330 ft (100.6 m)
Length	27 ft 3 in (8.31 m)
Loco weight	18.4 long tons (20.6 short tons; 18.7 t)
Fuel type	Coal
Fuel capacity	1,760 lb (800 kg)
Water cap	460 imp gal (2,100 L; 550 US gal)
Boiler pressure	145 psi (1.00 MPa)
Firegrate area	7.5 sq ft (0.70 m2)
Heating surface	407.6 sq ft (37.87 m2)
Cylinders	Two, outside
Cylinder size	11 in × 18 in (279.4 mm × 457.2 mm); or 11.5 in × 18 in (292.1 mm × 457.2 mm)
Loco brake	Hand brake, Carpenter brake from 1900

Type and origin
Power type	Steam
Builder	Dübs & Co. (2); Thunes Mekaniske Værksted (1),; Hamar Jernstøberi (1)
Serial number	Dübs 3172–3173,; Thune 4,; Hamar 77
Build date	1894 (2), 1901 (1) 1912 (1)
Total produced	4

NSB Class XXI
	NSB locomotive class XXI number 1 photographed at Dübs & Co. Locomotive Works before delivery to Setesdalsbanen.; Photograph by Dübs & Co., 1894.
Type and origin
Power type	Steam
Builder	Dübs & Co. (2); Thunes Mekaniske Værksted (1),; Hamar Jernstøberi (1)
Serial number	Dübs 3172–3173,; Thune 4,; Hamar 77
Build date	1894 (2), 1901 (1) 1912 (1)
Total produced	4
Specifications
Configuration	2-6-2T
UIC class	1′C1′t n2
Gauge	3 ft 6 in (1,067 mm)
Driver diameter	36 in (914.4 mm)
Minimum curve	330 ft (100.6 m)
Length	27 ft 3 in (8.31 m)
Loco weight	18.4 long tons (20.6 short tons; 18.7 t)
Fuel type	Coal
Fuel capacity	1,760 lb (800 kg)
Water cap	460 imp gal (2,100 L; 550 US gal)
Boiler pressure	145 psi (1.00 MPa)
Firegrate area	7.5 sq ft (0.70 m2)
Heating surface	407.6 sq ft (37.87 m2)
Cylinders	Two, outside
Cylinder size	11 in × 18 in (279.4 mm × 457.2 mm); or 11.5 in × 18 in (292.1 mm × 457.2 mm)
Loco brake	Hand brake, Carpenter brake from 1900
Performance figures
Maximum speed	25 mph (40 km/h)
Career
Operators	Norges Statsbaner
Numbers	1, 2, 5, 7
Locale	Setesdalsbanen

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NSB Class XXI is a steam locomotive class designed by the Norwegian State Railways exclusively for use on the Setesdal Line.

External links

Heritage locomotive on the Setesdal Line