NSB 0-6-0 Locomotives in Norway


Class Details by Steve Llanso of Sweat House Media

Class Class 10/10a (2-6-0) (Locobase 6105)

Data from:

Svein Sando's Railway Site [] (9 June 2004) --(Later link: The Semaphore, accessed for link update 10 July 2022.)--and the Jernbane (Iron Road) site [] (June 2004).

Identical to the 1867 Class 4 design except for a higher boiler pressure. Like the Class 4, these were converted to Moguls at some point after delivery. The last of the class was withdrawn in 1923.


Class Class 23a/23b (Locobase 6166)

Data from:

Svein Sando's Railway Site [] (9 June 2004)--(Later link: The Semaphore, accessed for link update 10 July 2022.)-- and the Jernbane (Iron Road) site http://jernbane.net (June 2004).

These six-coupled tanks were built as single entries in 1907 and 1911 (both by Hamar). After a long break, five were delivered in 1923 (works #319-323) from Thune, and seven more from Hamar & Thune in 1924. Locobase is not sure which engines were 23a and which were 23b. Given the long gap between the first two and the last 12, however, we lean toward taking the 1920s locomotives into the 12b classification. The data represent that version. (23a had 400-mm/15.75" diameter cylinders and smaller water tankage and coal bunkerage.)

Four of the locomotives shared a common retirement date: 442, 454, 457, and 460 all were withdrawn on 9 November 1970.


Class Class 36 (Locobase 6179)

Data from:

Svein Sando's Railway Site [] (9 June 2004)--(Later link: The Semaphore, accessed for link update 10 July 2022.)--and the Jernbane (Iron Road) site http://jernbane.net (June 2004).

This single six-coupled tank was originally purchased by the Aktieselskabet Sydvaranger in Kirkenes. As such locomotives went in Norway, this was a large engine both in power and in weight.

When the NSB took 410 over, it was first based in Narvik, later in Oslo. Retirement came on 10 November 1954.


Class Class 4/4a (2-6-0) (Locobase 6102)

Data from:

Svein Sando's Railway Site [] (9 June 2004)--(Later link: The Semaphore, accessed for link update 10 July 2022.)--and the Jernbane (Iron Road) site [] (June 2004).

The first freight locomotive (B,P works #812), very similar to the 2-4-0 that arrived two years later. Sando's table doesn't say for sure, but it appears that the 4a is this locomotive reconstructed as a 2-6-0.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassClass 10/10a (2-6-0)Class 23a/23bClass 36Class 4/4a (2-6-0)
Locobase ID6105 6166 6179 6102
RailroadNSBNSBNSBNSB
CountryNorwayNorwayNorwayNorway
Whyte0-6-00-6-0T0-6-0T0-6-0
Number in Class41411
Road Numbers49-52159, 165, 439-43, 454-6041020
GaugeStdStdStdStd
Number Built41411
BuilderNydqvist & Holm (NOHAB)severalHanomagBeyer, Peacock
Year1877190719171867
Valve GearStephensonStephensonHeusingerStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.84 / 3
Engine Wheelbase (ft / m) 9.84 / 3
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)37.02 / 11.28 9.84 / 332.36 / 9.86
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)63,714 / 28,90086,201 / 39,10095,901 / 43,50063,714 / 28,900
Engine Weight (lbs / kg)63,714 / 28,90086,201 / 39,10095,901 / 43,50063,714 / 28,900
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)86,201 / 39,10095,901 / 43,500
Tender Water Capacity (gals / ML)1056 / 41135 / 4.30
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.30 / 3 1.40 / 1 1.30 / 1 3.30 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.5048 / 2453 / 26.5035 / 17.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57 / 144849.20 / 125043.30 / 110057 / 1448
Boiler Pressure (psi / kPa)142.10 / 9.80174 / 12188.50 / 13121.80 / 8.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 22" / 406x56015.75" x 21.65" / 400x55016.93" x 21.65" / 430x55016" x 22" / 406x560
Tractive Effort (lbs / kg)11,934 / 5413.1816,144 / 7322.8022,962 / 10415.4010,229 / 4639.80
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.34 5.34 4.18 6.23
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)14 / 1.3013.56 / 1.2614.53 / 1.3514 / 1.30
Evaporative Heating Surface (sq ft / m2)759 / 70.50837 / 77.801067 / 99.20759 / 70.50
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)759 / 70.50837 / 77.801067 / 99.20759 / 70.50
Evaporative Heating Surface/Cylinder Volume148.25171.45189.15148.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1989235927391705
Same as above plus superheater percentage1989235927391705
Same as above but substitute firebox area for grate area
Power L1
Power MT

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