Bredsjö - Degerfors 4-6-0 Locomotives in Sweden


Class Details by Steve Llanso of Sweat House Media

Class H3/A6 (Locobase 20213)

Data from Litt-A6-BDJ, 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.)

Motala's works number 494 was the first in 1913. Falun delivered the other five, four in 1918 (works numbers 254-257) and one in 1927 (works number 339).

The series of Ten-wheelers (Locobases 20208-20211) built with 520 x 610 cylinders and 1,720 mm diameter drivers all had relatively low axle loadings. Piston valves delivering steam to the cylinders had 200 mm (7.9") diameters in this batch.

(NB: Locobase's specifications show the evaporative heating surface area using the tubes' outer diameter (i.e., the water side)).

Principal Dimensions by Steve Llanso of Sweat House Media

ClassH3/A6
Locobase ID20213
RailroadBredsjö - Degerfors (BDJ)/Statens Jarnvagar
CountrySweden
Whyte4-6-0
Number in Class6
Road Numbers71-76/1795-1800
GaugeStd
Number Built6
Builderseveral
Year1913
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.45 / 4.10
Engine Wheelbase (ft / m)27.72 / 8.45
Ratio of driving wheelbase to overall engine wheelbase 0.49
Overall Wheelbase (engine & tender) (ft / m)46.26 / 14.10
Axle Loading (Maximum Weight per Axle) (lbs / kg)27,337 / 12,400
Weight on Drivers (lbs / kg)81,571 / 37,000
Engine Weight (lbs / kg)125,222 / 56,800
Tender Loaded Weight (lbs / kg)75,618 / 34,300
Total Engine and Tender Weight (lbs / kg)200,840 / 91,100
Tender Water Capacity (gals / ML)3643 / 13.80
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 5.20 / 5
Minimum weight of rail (calculated) (lb/yd / kg/m)45 / 22.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)67.40 / 1712
Boiler Pressure (psi / kPa)171.10 / 11.80
High Pressure Cylinders (dia x stroke) (in / mm)20.47" x 24.02" / 520x610
Tractive Effort (lbs / kg)21,718 / 9851.13
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.76
Heating Ability
Tubes (number - dia) (in / mm)127 - 1.89" / 48
Flues (number - dia) (in / mm)21 - 5" / 127
Flue/Tube length (ft / m)13.78 / 4.20
Firebox Area (sq ft / m2)118.40 / 11
Grate Area (sq ft / m2)25.83 / 2.40
Evaporative Heating Surface (sq ft / m2)1363 / 126.60
Superheating Surface (sq ft / m2)382 / 35.50
Combined Heating Surface (sq ft / m2)1745 / 162.10
Evaporative Heating Surface/Cylinder Volume148.97
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4420
Same as above plus superheater percentage5392
Same as above but substitute firebox area for grate area24,715
Power L111,329
Power MT918.57

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