Regierung Articulated Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 11874)

Data from TecBook reprint of Sachsische Maschinenfabrik Richard Hartmann: alle 1910 catalogue. p. 26, previewed in Google Books (last accessed 11 December 2010). Bern Ilge's production list, available at [], last accessed 1 October 2020. Works numbers 2954-2993 cover both engines (A and B), which formed 20 sets.

As noted in Locobase 4870, twin locomotives were two locomotives bolted back-to-back and run by one crew. The data are for the two engines combined.

Wikipedia's article on Zwilling (Heeresfeldbahn) states that the Japanese Army Field Railway procured a total of 188 twins in 1905-1906.


Class unknown (Locobase 20799)

Data from "Feldbahn-Lokomotiven fur 600 mm Spurweite", Die Lokomotive, Volume 9, No 6 (Juni 1912), pp. 134-135.

As noted in Locobase 4870 (Zwilling) twin locomotives were two locomotives bolted back-to-back and run by one crew. The data are for the two engines combined.

These Borsig locomotives had large drum-shaped spark-arresting caps topping both chimneys (stack). In addition to side tanks on both engines, the rear locomotive trailed a tender. Tender capacities amounted to 3.1 cubic metres (3,100 litres/818 US gallons) of water and 0.85 metric tons (0.94 short tons) of coal. Locobase suspects that neither water nor coal could transfer to the tanks and bunkers of moving locomotive.

Principal Dimensions by Steve Llanso of Middle Run Media

Classunknownunknown
Locobase ID11874 20799
RailroadRegierungRegierung
CountryJapanJapan
Whyte0-6+6-0T0-6+6-0T
Number in Class2039
Road NumbersA&B 57-A&B 76
Gauge60 cm60 cm
Number Built2039
BuilderHartmannBorsig
Year19051912
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 4.27 / 1.30 4.27 / 1.30
Engine Wheelbase (ft / m)12.63 / 3.8517.39 / 5.30
Ratio of driving wheelbase to overall engine wheelbase 0.34 0.25
Overall Wheelbase (engine & tender) (ft / m)12.63 / 3.8512.63 / 3.85
Axle Loading (Maximum Weight per Axle) (lbs / kg)6526 / 29605952 / 2700
Weight on Drivers (lbs / kg)36,112 / 16,38034,833 / 15,800
Engine Weight (lbs / kg)36,112 / 16,38034,833 / 15,800
Tender Loaded Weight (lbs / kg)14,220 / 6450
Total Engine and Tender Weight (lbs / kg)36,112 / 16,38049,053 / 22,250
Tender Water Capacity (gals / ML)462 / 1.75238 / 0.90
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.50 / 0.45 0.30 / 0.25
Minimum weight of rail (calculated) (lb/yd / kg/m)10 / 510 / 5
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)23.10 / 58623.10 / 586
Boiler Pressure (psi / kPa)213.20 / 14.70213.20 / 14.70
High Pressure Cylinders (dia x stroke) (in / mm)7.09" x 9.45" / 180x240 (4)7.09" x 9.45" / 180x240 (4)
Tractive Effort (lbs / kg)7453 / 3380.637453 / 3380.63
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.85 4.67
Heating Ability
Tubes (number - dia) (in / mm)43 - 1.732" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.19 / 2.80
Firebox Area (sq ft / m2)26.05 / 2.4216.04 / 1.49
Grate Area (sq ft / m2) 6.24 / 0.58 6.24 / 0.58
Evaporative Heating Surface (sq ft / m2)308 / 28.58195 / 18.13
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)308 / 28.58195 / 18.13
Evaporative Heating Surface/Cylinder Volume356.63225.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation13301330
Same as above plus superheater percentage13301330
Same as above but substitute firebox area for grate area55543420
Power L141652616
Power MT1525.63993.42

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