NSB 2-8-2 Locomotives in Norway


Class Details by Steve Llanso of Sweat House Media

Class Class 34a (Locobase 6177)

Data from DeGolyer, Volume 60, pp. 43+. Svein Sando's Railway Site [link] (9 June 2004)--(Later link: The Semaphore, accessed for link update 10 July 2022.)--and the Jernbane (Iron Road) site [link] (originally June 2004, last accessed 30 January 2010). Works numbers were 45839-45840 in June 1917 and 45873, 45942 in July.

This quartet of Mikado tanks represent the only locomotives with a 2-8-2 arrangement to run in Norwegian service. If Locobase properly teases out meaning from the Norse comments in the Jernbane listing, these were essentially repeats of the Type 32 Prairie tanks with smaller drivers on very nearly the same wheelbase. Although there seem to have been some clear advantages to this variation -- greater power, more weight on the drivers -- the boiler is quite small in relation to the larger cylinders. This may be the reason more Type 34s were not procured.

345 was built with the others, but delivered to Norsk Hydro Electric Nitrogen Co.

They operated on the Gjobikbanen out of Oslo until retirement with 328 being the last to be withdrawn on 23 August 1958.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassClass 34a
Locobase ID6177
RailroadNSB
CountryNorway
Whyte2-8-2T
Number in Class4
Road Numbers328-330, 345
GaugeStd
Number Built4
BuilderBaldwin
Year1917
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.76 / 4.50
Engine Wheelbase (ft / m)27.40 / 8.35
Ratio of driving wheelbase to overall engine wheelbase 0.54
Overall Wheelbase (engine & tender) (ft / m)27.40 / 8.35
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)110,231 / 50,000
Engine Weight (lbs / kg)130,954 / 59,400
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)130,954 / 59,400
Tender Water Capacity (gals / ML)2376 / 9
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.80 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)46 / 23
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53.10 / 1349
Boiler Pressure (psi / kPa)174 / 1200
High Pressure Cylinders (dia x stroke) (in / mm)22.05" x 23.62" / 560x600
Tractive Effort (lbs / kg)31,987 / 14509.08
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.45
Heating Ability
Tubes (number - dia) (in / mm)121 - 1.89" / 48
Flues (number - dia) (in / mm)18 - 5" / 127
Flue/Tube length (ft / m)12.01 / 3.66
Firebox Area (sq ft / m2)103.98 / 9.66
Grate Area (sq ft / m2)19.16 / 1.78
Evaporative Heating Surface (sq ft / m2)1093 / 101.54
Superheating Surface (sq ft / m2)233 / 21.65
Combined Heating Surface (sq ft / m2)1326 / 123.19
Evaporative Heating Surface/Cylinder Volume104.70
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3334
Same as above plus superheater percentage3934
Same as above but substitute firebox area for grate area21,349
Power L15472
Power MT437.76

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