Stockholm-Vasteras-Bergslagens 2-6-0 Locomotives in Sweden


Class Details by Steve Llanso of Sweat House Media

Class 43/L24 (Locobase 10642)

Data from Litt L24, one of a series of SJ locomotive diagrams archived by Anders Lundbing on [link], last accessed 10 June 2017 (Snabcon AB advertised its tools for mounting RJ45 connectors on bundled cables.) and Tommy Nilsson's Svenska-lok.se website at Svenska-lok.se, last accessed 21 June 2018. See also "Eight-Wheeled Locomotive, Stockholm-Vesteras-Bergslagens Ry," The Locomotive Magazine, Vol XIV (15 February 1908), p. 35. Works numbers were 1156-1157 in 1907.

Sturdy little Swedish Moguls with very high-pitched, superheated boiler and inside radial valve gear and cylinders. (Inside tube and flue diameters measured 42.5 and 118 mm, respectively, which led to a tube heating surface area of 74.4 sq m (801 sq ft). By the time of the SJ diagram, firebox heating surface was calculated to be 7.8 sq m (84 sq ft), resulting in 82.2 sq m (885 sq ft) evaporative heating surface area.

A very compact profiles showed the steam dome (or, rather, loaf) set over the center driving axle, just ahead of the firebox. A full cab with cutout window took cognizance of the cold Scandinavian winter. A larger tender joined the locomotive in 1936. The Statens Jarnvagar took the two locomotives into its roster in 1945 as L24s. 1717 was retired in 1953 with 1718 in 1960. Scrappings followed in 1966 and 1967.


Class E7/L25 (Locobase 20793)

Data from Litt. L25, one of a series of SJ locomotive diagrams archived by Anders Lundbing on [link], last accessed 10 June 2017 (Snabcon AB advertised its tools for mounting RJ45 connectors on bundled cables.) and Tommy Nilsson's Svenska-lok.se website at Svenska-lok.se, last accessed 20 July 2018.

Sharp, Stewart of Glasgow delivered this sextet of saturated-boiler Moguls in 1900 (Works numbers were 4601-4606). Small with valve motion inside, they merited a superheater update in 1916 (approximately) that included the usual change to piston valves.

The SWB converted 48-49 to 2-6-4 tank locomotives in 1935 and 1942, but soon rebuilt as tender engines. Taken over as a batch by the Statens Jarnvagar in 1945 and renumbered 1719-1724, the class stayed in service for another decade.

Four fell to the ferro-knacker in 1955-1956. 1719 was cut up in 1965 and 1724 followed in 1966.


Class F3a/L23 (Locobase 20792)

Data from "Tenderlok Litt. L23", one of a series of SJ locomotive diagrams archived by Anders Lundbing on [link], last accessed 10 June 2017;and Tommy Nillson's [link], las accessed 6 September 2020. Works numbes were 199-202 in 1899.

This quartet entered service at the turn of the century (1899) and proved valuable enough to merit a superheater installation in 1924-1928. The class leader was scrapped in 1936, but the other three formed Statens Jarnvagar class L23 upon nationalization in 1945.

Operating from the Vasteras and Krianstadt depots, they remained in service until the late 1950s. Placed in Sweden's strategic reserve, the latter two survivors were scrapped at Vislanda in 1966-1967. 1714 returned to Vasteras for display in 1968.

Principal Dimensions by Steve Llanso of Middle Run Media
Class43/L24E7/L25F3a/L23
Locobase ID10642 20793 20792
RailroadStockholm-Vasteras-Bergslagens (SWB)Stockholm-Vasteras-Bergslagens (SWB)/SJStockholm-Vasteras-Bergslagens (SWB)
CountrySwedenSwedenSweden
Whyte2-6-02-6-02-6-0
Number in Class264
Road Numbers43-44/1717-171845-50/1719-172439-42/1714-1716
GaugeStdStdStd
Number Built2
BuilderNydqvist & Holm (NOHAB)SWBMotala
Year190719161924
Valve GearWalschaertAllanAllan
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.80 / 3.9012.80 / 3.9012.80 / 3.90
Engine Wheelbase (ft / m)19.69 / 619.32 / 5.8919.69 / 6
Ratio of driving wheelbase to overall engine wheelbase 0.65 0.66 0.65
Overall Wheelbase (engine & tender) (ft / m)39.53 / 12.0538.88 / 11.8537.07 / 11.30
Axle Loading (Maximum Weight per Axle) (lbs / kg)26,896 / 12,20028,219 / 12,80027,558 / 12,500
Weight on Drivers (lbs / kg)80,028 / 36,30078,484 / 35,60079,366 / 36,000
Engine Weight (lbs / kg)92,153 / 41,80091,933 / 41,70090,389 / 41,000
Tender Loaded Weight (lbs / kg)73,634 / 33,40057,541 / 26,10049,846 / 22,610
Total Engine and Tender Weight (lbs / kg)165,787 / 75,200149,474 / 67,800140,235 / 63,610
Tender Water Capacity (gals / ML)3696 / 142508 / 9.506600 / 25
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.50 / 3 5.10 / 513 / 12
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 2244 / 2244 / 22
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)61 / 155055.50 / 141061 / 1550
Boiler Pressure (psi / kPa)156.60 / 1080171.10 / 1180156.60 / 1080
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 24.02" / 470x61017.32" x 24.02" / 440x61017.01" x 24.02" / 432x610
Tractive Effort (lbs / kg)17,939 / 8137.0018,882 / 8564.7415,166 / 6879.19
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.46 4.16 5.23
Heating Ability
Tubes (number - dia) (in / mm)112 - 1.89" / 48107 - 1.89" / 48106 - 1.89" / 48
Flues (number - dia) (in / mm)18 - 5" / 12715 - 5" / 12715 - 5" / 127
Flue/Tube length (ft / m)10.83 / 3.3010.56 / 3.2211.15 / 3.40
Firebox Area (sq ft / m2)88.80 / 8.2586.11 / 8
Grate Area (sq ft / m2)19.81 / 1.8419.38 / 1.8018.30 / 1.70
Evaporative Heating Surface (sq ft / m2)984 / 91.45807 / 75
Superheating Surface (sq ft / m2)248 / 23.05209 / 19.40
Combined Heating Surface (sq ft / m2)1232 / 114.501016 / 94.40
Evaporative Heating Surface/Cylinder Volume131.67123.21
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation310233162866
Same as above plus superheater percentage372340122866
Same as above but substitute firebox area for grate area16,68717,827
Power L177987535
Power MT644.46634.98

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