Randsfjord 0-6-0 Locomotives in Norway


Class Details by Steve Llanso of Sweat House Media

Class Class 25a (Locobase 4072)

Built by Hamar and Thune, this batch of tank locomotives was built to supply the new, standard-gauge line. They were, says the Norwegian Railway Club (Norsk Jerbaneklubb) website [], based on the NHJ Class F (itself designated Class 43 by the NSB).


Class Class 25b/25c (Locobase 4073)

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 [] (originally June 2004, last accessed 30 January 2010). See also DeGolyer, Volume 60, p. 5. See also "Baldwin Locomotives for the Norwegian Government Rys", Locomotive Magazine, Volume 24 (15 January 1917), pp. 16-17. Works numbers were 45601-45606 in May 1917

Supplementing the Class 25a class built in Norway, these engines were not as well-balanced, says the Norwegian Railway Club (Norsk Jerbaneklubb) website [] . The last in this batch was delivered to the Norwegian Hydro Electric Nitrate Co (aka the 16-km Rjukan Railway) and the first soon joined it.

Baldwin delivered three more in 1919 -- works numbers were 51966-51968 in June 1919--which were designated 25c.


Class Class 25d (Locobase 4075)

See website Norwegian Railway Club (Norsk Jerbaneklubb) website [] and [] (originally June 2004, last accessed 30 January 2010).

These NMI machines had mostly minor differences from the earlier Class 25s (Locobases 6179, 4072, and 4073), but the big difference was in the introduction of superheater to the basic design.

Principal Dimensions by Steve Llanso of Middle Run Media

ClassClass 25aClass 25b/25cClass 25d
Locobase ID4072 4073 4075
RailroadRandsfjordRandsfjordRandsfjord
CountryNorwayNorwayNorway
Whyte0-6-0T0-6-0T0-6-0T
Number in Class2296
Road Numbers197-200, 223336-340, 344, 381-383420-425
GaugeStdStdStd
Number Built2296
BuilderseveralBaldwinNMI
Year190919171917
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.23 / 3.12
Engine Wheelbase (ft / m)10.23 / 3.12
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)10.23 / 3.12
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)77,162 / 35,00079,300 / 35,97079,807 / 36,200
Engine Weight (lbs / kg)77,162 / 35,00079,300 / 35,97079,807 / 36,200
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)77,162 / 35,00079,300 / 35,97079,807 / 36,200
Tender Water Capacity (gals / ML)1410 / 5.34
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.30 / 1 1.30 / 1 1.30 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)43 / 21.5044 / 2244 / 22
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41.70 / 106040.55 / 103041.70 / 1060
Boiler Pressure (psi / kPa)169.70 / 11.70169.70 / 11.70169.70 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)14.17" x 19.69" / 360x50014.17" x 19.69" / 360x50014.17" x 19.69" / 360x500
Tractive Effort (lbs / kg)13,676 / 6203.3414,064 / 6379.3313,676 / 6203.34
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.64 5.64 5.84
Heating Ability
Tubes (number - dia) (in / mm)136 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.84 / 3
Firebox Area (sq ft / m2)60 / 5.57
Grate Area (sq ft / m2)12.59 / 1.1712.70 / 1.1812.59 / 1.17
Evaporative Heating Surface (sq ft / m2)624 / 57.99668 / 62.06506 / 47.03
Superheating Surface (sq ft / m2)237 / 22.03
Combined Heating Surface (sq ft / m2)624 / 57.99668 / 62.06743 / 69.06
Evaporative Heating Surface/Cylinder Volume173.63185.87140.80
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation213721552137
Same as above plus superheater percentage213721552820
Same as above but substitute firebox area for grate area10,182
Power L13089
Power MT257.63

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