NSB Class 15

NSB Type 15
NSB 15f no. 83, formerly 11b no. 83
Type and origin Power type Steam Builder Dübs, Nylands mekaniske verksted,Thunes, Hamar, Sächsische Maschinenfabrik, Schweizerische Lokomotiv- und Maschinenfabrik Build date 1896, 1898 - 1902 Total produced 16
Specifications Configuration: ​  • Whyte 2-6-0  • UIC 15a/b/c: 1'C-3 n2v 15d/e: 1'C-3 h2v 15f/g/h: 1'C-3 h2 Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Driver dia. 1,448 mm (4 ft 9.0 in) Length 14,432 mm (47 ft 4.2 in) Fuel type Coal Fuel capacity 3 t (3.3 short tons; 3.0 long tons) Water cap 7.7 m3 (1,700 imp gal) Firebox:  • Firegrate area 15a/b/d/g: 1.3 m2 (14 sq ft) 15c/e/f/h: 1.26 m2 (13.6 sq ft) Boiler pressure 12 kg/cm2 (170 psi) Heating surface:  • Firebox 15a: 82.3 m2 (886 sq ft) 15b: 76.4 m2 (822 sq ft) 15c: 78.5 m2 (845 sq ft) 15d: 72.5 m2 (780 sq ft) 15e/f/g 63.4 m2 (682 sq ft) 15h 71.2 m2 (766 sq ft) Superheater: ​  • Heating area 15d/h: 45 m2 (480 sq ft) 15e/f/g: 16.3 m2 (175 sq ft) Cylinders 2 Cylinder size 15f/g/h:432 mm × 610 mm (17.0 in × 24.0 in) High-pressure cylinder 15a/b/c/d/e: 425 mm × 610 mm (16.7 in × 24.0 in) Low-pressure cylinder 15a/b/c/d/e: 635 mm × 610 mm (25.0 in × 24.0 in)
Performance figures Maximum speed Forward: 60 km/h (37 mph) Reverse: 45 km/h (28 mph)
Career Operators Norwegian State Railways Numbers 64, 65, 83, 104–106, 110, 121–127, 139–143 Withdrawn 1935 - 1956 Preserved None, All scrapped

15c no. 125

The NSB Type 15 were Norwegian locomotives with the wheel arrangement 1'C (2-6-0), which were built between 1896 and 1901 by Thunes mekaniske verksted in Oslo, Hamar Jernstøberi in Hamar, Schweizerische Lokomotiv- und Maschinenfabrik in Winterthur, Sächsische Maschinenfabrik Hartmann in Chemnitz, Dübs and Company in Glasgow and Nylands mekaniske verksted in Oslo.

History

The Type 15 was a further development of the NSB Type 11. While the type 11 was originally a saturated steam locomotive with a four-wheel tender, the 15 received a six-wheel tender. In later years it was developed further as the NSB Type 21.

They were goods engine, but with 1,448 mm driving wheels which meant they could be used on passenger trains as well. The engines had a light axle load and therefore they could be used on branch lines. They were also used on mainlines up to the First World War.

Type 15 variants

The locomotives were rebuilt at a time of constant technical development. As a result, some locomotives were rebuilt several times during their life and re-designated into different (sub-)types. Over the years, most locomotives were fitted with a superheater. During other rebuilds, the compound locomotives were rebuilt as simple expansion, giving rise to further sub-types. In addition, three type 11 locomotives were fitted with six wheel tenders and re-designated type 15 (d, f and h). The rebuilds included five type 15a, one 15b and ten 15c, all other sub-series were created by rebuilding locomotives.

NSB Type 15a

15a no. 60 was delivered as a prototype by Dübs and Company in 1896. In 1898 the locomotive received the new number 15a no. 105. This was followed in 1899 by locomotives numbered 15a 106 and 121, built in Germany. The third batch were 15a nos. 122 and 123 by Nyland. 15a no. 123 was rebuilt in 1924 to the sub-class 15f and 122 in 1928.

NSB Type 15b

15b no. 104 was built by Dübs and was put into service on February 2, 1899. It was the only locomotive of this type and was rebuilt in March 1921 as a Type 15d, as a compounded locomotive with a superheater.

NSB Type 15c

These ten saturated compound locomotives were built and put into service in 1901 and 1902. This was the end of any new Type 15 being built.

15c Nos. 110, 125, 126, 127, 139, 141 and 143 remained in their original condition until they were withdrawn between 1935 and 1950. The last locomotive to remain in service was 15c no. 110, which was withdrawn on 2 June 1950.

In 1922 15c no. 142 was fitted with a superheater, after which it was re-designated 15e no. 142. 142, followed in 1923 by 15c no. 124, it was not until 1940 when 15c no. 140 was rebuilt.

NSB Type 15d

No. 104 was rebuilt into a type 15d in March 1921, and 11f no. 83 was rebuilt in November 1931, both being re-designated into the type 15d. No. 83 was rebuilt yet again in November 1941 to the type 15f as a simple expansion.

15d no. 104 was withdrawn on November 9, 1935.

NSB Type 15e

Locomotives 15c nos. 124, 140 and 142, which were rebuilt into the type 15e. 15e no. 124 was rebuilt into 15g in 1929, no. 140 was rebuilt into 15f in 1927 and no. 140 was renumbered into no. 142 shortly after, all the locomotive now being simple expansion. No. 140 was withdrawn in 1955 and no. 142 in 1952.

15g no. 124 was also rebuilt into the type 15e in 1932 and was withdrawn on May 28, 1954.

NSB Type 15f

15a no. 122 was rebuilt in 1928 and 15a no. 123 in 1924, 15g no. 124 was rebuilt into type 15f in 1932. 15e no. 140 was rebuilt into a type 15f in 1927 and 142 was the next locomotive to be rebuilt into a 15f in 1928. All locomotives were rebuilt to simple expansion during these rebuilds. 15d no. 83, the formerly 11f no. 83 was rebuilt in November 1941 a 15f. This was the last of the series to be rebuilt.

NSB Type 15g

15e no. 124, rebuilt in 1929 to 15g no. 124, the engine was rebuilt into the type 15f in 1932.

NSB Type 15h

By replacing the four wheel tender on the type 11e nos. 64 and 65 with a six-wheel tender into the type 15h, which remained in service through 1935 and 1947.

Use

15c no. 125 ordered for the Hell–Sunnanbanen was delivered directly from the factory to the Ofotbane in February 1902. On loan from NSB District 4 (Trondheim), No. 125 ran the Norwegian service to Riksgrensen in celebration of the unification of the Norwegian and Swedish parts of the Kiruna – Narvik – Fagernes line on 15 November 1902.

External links

• Locomotive types on jernbane.net. Archived from the original on March 19, 2008 ; Accessed 08-03-2023 (Norwegian).
• Database about rullende jernbanemamaterial brukt i Norge. Norsk Jerbaneklubb, Accessed 08-03-2023 (Norwegian).
• Type 15 – Jernbane.net

Template:Rolling stock of Norway

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