Bergslagernas 0-4-2 Locomotives in Sweden

Class Details by Steve Llanso of Sweat House Media

Class C9 (Locobase 20369)

Data from Litt J, one of a series of SJ locomotive diagrams archived by Anders Lundbing on [], last accessed 10 June 2017 (Snabcon AB advertised its tools for mounting RJ45 connectors on bundled cables.) and Olavia Hokas's Swedish Steam website at [], first accessed 21 January 2006 (most recently 29 April 2018); and Tommy Nilsson's website at, last accessed 5 May 2018. Works number was 1931.

Nilsson's descriptions says that Beyer Peacock delivered a dozen of these small four-coupled leading engines for passenger work. Normally, all of the class would have been discarded well before the SJ acquired a single example in 1948. But the 29 had moved from main-line service to hauling an inspection train and thus was still available.

Within six years, however, the 1821 was scrapped and its boiler sent to the Prins August museum.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20369
RailroadBergslagernas (BJ)
Number in Class12
Road Numbers29/1821
Number Built12
BuilderBeyer, Peacock
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13
Engine Wheelbase (ft / m)14.43 / 4.40
Ratio of driving wheelbase to overall engine wheelbase 0.49
Overall Wheelbase (engine & tender) (ft / m)30.18 / 9.20
Axle Loading (Maximum Weight per Axle) (lbs / kg)25,574 / 11,600
Weight on Drivers (lbs / kg)49,163 / 22,300
Engine Weight (lbs / kg)64,154 / 29,100
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)64,154 / 29,100
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.20 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62 / 1575
Boiler Pressure (psi / kPa)156.60 / 10.80
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 24.02" / 470x610
Tractive Effort (lbs / kg)17,650 / 8005.91
Factor of Adhesion (Weight on Drivers/Tractive Effort) 2.79
Heating Ability
Tubes (number - dia) (in / mm)186 - 1.811" / 46
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.61 / 2.93
Firebox Area (sq ft / m2)85.04 / 7.90
Grate Area (sq ft / m2)15.07 / 1.40
Evaporative Heating Surface (sq ft / m2)869 / 80.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)869 / 80.70
Evaporative Heating Surface/Cylinder Volume116.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2360
Same as above plus superheater percentage2360
Same as above but substitute firebox area for grate area13,317
Power L12802
Power MT251.30

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