Wurttembergische 2-12-0 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class Group K/BR 59 (Locobase 2521)

Data from US Military Railway Service Equipment Data Book -- German Locomotives supplied from the extensive collection of Allen Stanley (March 2004). See also "Baureihe 59.0" on Alfred Gieseler's Dampfmaschinen und Lokomotiven website at [link], last accessed 21 April 2019; and "Württembergische K" in Wikipedia.de at [link], last accessed 16 February 2024; and Douglas Self, "Wurtemberg [sic] State Railway Class K locomotive" at [link], last accessed 16 February 2024 . (Thanks to Alexander Blessing for his 4 February 2024 email noting the correct road numbers and engine wheelbase.)

home.t-online.de/home/kopka.manfred/stamp.htm added that these engines were quite successful, both the most powerful freight haulers of their time and an extremely economical design on an axle loading of 16 metric tons (35,274 lb) . (Wikipedia's entry says the class showed better economy on the hilly sections than on the flat.). They were four-cylinder de Glehn compounds with the inside HP cylinders driving the third coupled axles and outside low-pressure cylinders turning the 4th coupling axle.

With electrification of the Geislinger line, some were sent off to Austria to work the Semmering grade with four 659s (postwar cliass ID by the OBB) operating until 1957. Others went to Hungary and Yugoslavia. Of those that remained in Germany, the last continued in service until 1953.

NB: Locobase's specs are based on the water-side tube heating surface area. Figured from the fire side (the usual practice in Continental countries), the tube heating surface area was 2,331 sq ft (216.56 sq m) and evaporative heating surface area was 2,503 sq ft (232.5 sq m). Also the MRS Diagram Book, notable for its very exact conversions, measured the superheater area as 968 sq ft (89.9 sq m).

Principal Dimensions by Steve Llanso of Middle Run Media
ClassGroup K/BR 59
Locobase ID2521
RailroadWurttembergische (Wurttemberg) Staatsbahn
CountryGermany
Whyte2-12-0
Number in Class44
Road Numbers1801-1815/59 001-59 044
GaugeStd
Number Built44
BuilderEsslingen
Year1917
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)23.79 / 7.25
Engine Wheelbase (ft / m)32.48 / 9.90
Ratio of driving wheelbase to overall engine wheelbase 0.73
Overall Wheelbase (engine & tender) (ft / m)56.36 / 17.18
Axle Loading (Maximum Weight per Axle) (lbs / kg)34,833 / 15,800
Weight on Drivers (lbs / kg)208,557 / 94,600
Engine Weight (lbs / kg)238,099 / 108,000
Tender Loaded Weight (lbs / kg)102,740 / 46,602
Total Engine and Tender Weight (lbs / kg)340,839 / 154,602
Tender Water Capacity (gals / ML)5280 / 20
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.60 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)58 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53.10 / 1349
Boiler Pressure (psi / kPa)217.60 / 1500
High Pressure Cylinders (dia x stroke) (in / mm)19.69" x 25.59" / 500x650
Low Pressure Cylinders (dia x stroke) (in / mm)29.53" x 25.59" / 750x650
Tractive Effort (lbs / kg)47,844 / 21701.70
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.36
Heating Ability
Tubes (number - dia) (in / mm)183 - 2.047" / 52
Flues (number - dia) (in / mm)32 - 5.236" / 133
Flue/Tube length (ft / m)18.04 / 5.50
Firebox Area (sq ft / m2)172.22 / 16
Grate Area (sq ft / m2)44.24 / 4.11
Evaporative Heating Surface (sq ft / m2)2733 / 253.90
Superheating Surface (sq ft / m2)861 / 80
Combined Heating Surface (sq ft / m2)3594 / 333.90
Evaporative Heating Surface/Cylinder Volume303.04
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9627
Same as above plus superheater percentage11,937
Same as above but substitute firebox area for grate area46,469
Power L110,769
Power MT683.02

All material Copyright © SteamLocomotive.com
Wes Barris