Valdresbanen / NSB 2-8-2 Locomotives in Norway


Class Details by Steve Llanso of Sweat House Media

Class Class 51a (Locobase 6196)

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 of two Mikado tanks came to the VB in 1910; the other arrived in 1913. Like the latter, 5-6 were absorbed into the NSB on 1 January 1937. At some point, the engines were superheated with identical areas to those of the later VB #7 (see Locobase 6195), but slightly smaller cylinders.

22 was the last to retire, leaving service on 10 Nov 1954.


Class Class 52a (Locobase 6195)

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 one Mikado tank was the last VB locomotive and was taken into the NSB when that line absorbed the VB on 1 Jan 1937. It was retired on 28 Feb 1958.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassClass 51aClass 52a
Locobase ID6196 6195
RailroadValdresbanen / NSBValdresbanen / NSB
CountryNorwayNorway
Whyte2-8-2T2-8-2T
Number in Class21
Road Numbers5-6 / 21-227
GaugeStdStd
Number Built21
BuilderHartmannHartmann
Year19101926
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)31.66 / 9.6522.80 / 6.95
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)31.66 / 9.6522.80 / 6.95
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)72,201 / 32,75080,248 / 36,400
Engine Weight (lbs / kg)84,657 / 38,40089,728 / 40,700
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)84,657 / 38,40089,728 / 40,700
Tender Water Capacity (gals / ML)1452 / 5.501716 / 6.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.20 / 2 2.80 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)30 / 1533 / 16.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41.30 / 105041.30 / 1050
Boiler Pressure (psi / kPa)188.50 / 13188.50 / 13
High Pressure Cylinders (dia x stroke) (in / mm)15.75" x 20.47" / 400x520 (1)16.93" x 20.47" / 430x520
Low Pressure Cylinders (dia x stroke) (in / mm)23.62" x 20.47" / 600x520 (1)
Tractive Effort (lbs / kg)13,636 / 6185.1922,762 / 10324.68
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.29 3.53
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)16.36 / 1.5216.14 / 1.50
Evaporative Heating Surface (sq ft / m2)937 / 87.10767 / 71.30
Superheating Surface (sq ft / m2)188 / 17.50
Combined Heating Surface (sq ft / m2)937 / 87.10955 / 88.80
Evaporative Heating Surface/Cylinder Volume405.99143.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation30843042
Same as above plus superheater percentage30843651
Same as above but substitute firebox area for grate area
Power L1
Power MT

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