NSB 2-4-0 Locomotives in Norway


Class Details by Steve Llanso of Sweat House Media

Class Class 1a (Locobase 6086)

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).

This is the tank version of the Class 2 that arrived in the same year. According to Sando, the last of these little loks was withdrawn in 1915.


Class Class 2 (Locobase 1725)

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).

Began passenger service on the Kongsvinger line; later operated over most of the main lines in Norway. According to Sando, the last of these locomotives was withdrawn in 1920, 58 years after delivery.


Class Class 3 (Locobase 6101)

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).

A few years newer than the 3 class 2 engines and quite a bit bigger, but a solo effort apparently. Still, it remained in service until 1916.


Class Class 5 (Locobase 6103)

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).

Looks like a repeat of the Class 2, but a slightly larger boiler, heavier tender, and a 60 km/h (31 mph) speed rating, up 10 km/h (6.2 mph) from the Class 2. In any case, one of the smallest 2-4-0s of the time.

Remained in service until 1917.


Class Tryggve (Locobase 12393)

Data from "Norwegian Rolling Stock," Engineering, Vol 10 (11 November 1870). p. 348 and Charles Henri Couche (translated by J Edwards Wilson), Permanent Way Rolling Stock and Technical Working of Railways: Rolling stock (London: Dulau & Co, 1878), pp. 453-454. See also Frank Stamford's report on his 2008 visit to the Norwegian Railway Museum at [], Works numbers were 704-705 in 1866; 814 in 1867; 836-837 in 1868; 989-993 in 1870; 1105-1109 in 1871; 1316-1321 in 1873; 1399-1402 in 1874; 1581-1582 in 1875; 2249-2250 in 1882.

Stamford notes that Carl Pihl, the Norwegian engineer who developed the 3 ft 6 in gauge concept in Norway, struggled for a while to find the right locomotive design for the first railways. He and Charles Frederick Beyer "...came up with a 2-4-0T locomotive with leading Bissell truck, sloping cylinders and compensating beams between the driving axles."

Engineering describes a tank carriage often coupled to these engines. The carriage was essentially an auxiliary tender that carried a tank containing 162 US gallons. Water flowed directly into the engine through a pipe. (Locobase isn't sure of the destination--was it the boiler or, more likely, the tanks mounted on the locomotive?)

The design proved very successful. Its modest top speed of 55 km/h (34 mph) suited the traffic demands and the Bissell truck tracked truly over the light rails. The Engineering

Principal Dimensions by Steve Llanso of Sweat House Media

ClassClass 1aClass 2Class 3Class 5Tryggve
Locobase ID6086 1725 6101 6103 12393
RailroadNSBNSBNSBNSBNSB
CountryNorwayNorwayNorwayNorwayNorway
Whyte2-4-0T2-4-02-4-02-4-02-4-0T
Number in Class331124
Road Numbers13, 14, 1815-1719 / 2621
GaugeStdStdStdStd3'6"
Number Built331124
BuilderRobert Stephenson & CoRobert Stephenson & CoRobert Stephenson & CoBeyer, PeacockBeyer, Peacock
Year18621862186518671866
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98 6.27 / 1.91
Engine Wheelbase (ft / m)12.25 / 3.7312.28 / 3.7414.27 / 4.35
Ratio of driving wheelbase to overall engine wheelbase 0.53 0.44
Overall Wheelbase (engine & tender) (ft / m)12.25 / 3.7325.39 / 7.7430.52 / 9.3028.04 / 8.5514.27 / 4.35
Axle Loading (Maximum Weight per Axle) (lbs / kg)14,784 / 6706
Weight on Drivers (lbs / kg)39,242 / 17,80033,731 / 15,30046,297 / 21,00030,865 / 14,00028,829 / 13,077
Engine Weight (lbs / kg)53,722 / 24,36850,486 / 22,90061,729 / 25,30046,958 / 21,30037,789 / 17,141
Tender Loaded Weight (lbs / kg)27,337 / 12,40035,27432,187 / 14,600
Total Engine and Tender Weight (lbs / kg)53,722 / 24,36877,823 / 35,30097,003 / 25,30079,145 / 35,90037,789 / 17,141
Tender Water Capacity (gals / ML)581 / 2.20871 / 3.301188 / 4.50581 / 2.20
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.60 / 2 2.20 / 2 3.30 2.20 / 2 2.60 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)33 / 16.5028 / 1439 / 19.5026 / 1324 / 12
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57 / 144857 / 144857 / 144857 / 144845 / 1143
Boiler Pressure (psi / kPa)120 / 8.30120.40 / 8.30121.80 / 8.40120 / 8.30120 / 8.30
High Pressure Cylinders (dia x stroke) (in / mm)12" x 20" / 305x50812.01" x 20" / 305x50815" x 22" / 381x56012" x 20" / 305x50811" x 18" / 279x457
Tractive Effort (lbs / kg)5154 / 2337.825179 / 2349.168991 / 4078.255154 / 2337.824937 / 2239.39
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.61 6.51 5.15 5.99 5.84
Heating Ability
Tubes (number - dia) (in / mm)107 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.75 / 2.36
Firebox Area (sq ft / m2)40 / 3.72
Grate Area (sq ft / m2) 8.10 / 0.75 8.07 / 0.7510.76 / 1 8.10 / 0.75 7.30 / 0.68
Evaporative Heating Surface (sq ft / m2)523 / 48.61523 / 48.61808 / 75.10544 / 50.56417 / 38.74
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)523 / 48.61523 / 48.61808 / 75.10544 / 50.56417 / 38.74
Evaporative Heating Surface/Cylinder Volume199.77199.44179.57207.79210.62
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9729721311972876
Same as above plus superheater percentage9729721311972876
Same as above but substitute firebox area for grate area4800
Power L12805
Power MT429.01

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