Imperial Government Railways 0-10-0 Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class 4110 (Locobase 3819)

Data from Hiroshi Takagi, both from his website ([link]) and personal communication August 2000. His indispensable assistance is gratefully acknowledged.

Once the 4100s had been tried in service, Japanese builders began supplying additional locomotives of the same wheel arrangement. Note how the firebox area shrank considerably even as the grate area grew. Tubes are longer, but fewer in number. Like the other 4100s, this class had a slight boiler pressure increase to 185 psi.


Class 4140 (Locobase 3820)

Data from Hiroshi Takagi, both from his website ([link]) and personal communication August 2000. His indispensable assistance is gratefully acknowledged.

These last eight 4100s had one more superheater flue than the earlier 4110s shown in Locobase 3819.

Principal Dimensions by Steve Llanso of Middle Run Media
Class41104140
Locobase ID3819 3820
RailroadImperial Government Railways (JGR)Imperial Government Railways (JGR)
CountryJapanJapan
Whyte0-10-0T0-10-0T
Number in Class309
Road Numbers4110-41394140-4148
Gauge3'6"3'6"
Number Built309
BuilderKawasakiKawasaki
Year19141917
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)19 / 5.79
Engine Wheelbase (ft / m)19 / 5.79
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)28,770 / 13,05028,770 / 13,050
Weight on Drivers (lbs / kg)143,896 / 65,270143,896 / 65,270
Engine Weight (lbs / kg)143,896 / 65,270143,896 / 65,270
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)48 / 2448 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49 / 124549 / 1245
Boiler Pressure (psi / kPa)179.80 / 1240180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)20.98" x 24.02" / 533x61021" x 24" / 533x610
Tractive Effort (lbs / kg)32,976 / 14957.6833,048 / 14990.34
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.36 4.35
Heating Ability
Tubes (number - dia) (in / mm)136 - 1.732" / 44136 - 1.75" / 45
Flues (number - dia) (in / mm)21 - 5" / 12722 - 5" / 127
Flue/Tube length (ft / m)12.99 / 3.9613 / 3.96
Firebox Area (sq ft / m2)95.98 / 8.9295.98 / 8.92
Grate Area (sq ft / m2)23.99 / 2.2323.99 / 2.23
Evaporative Heating Surface (sq ft / m2)1262 / 117.331278 / 118.81
Superheating Surface (sq ft / m2)344 / 31.96360 / 33.48
Combined Heating Surface (sq ft / m2)1606 / 149.291638 / 152.29
Evaporative Heating Surface/Cylinder Volume131.31132.83
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation43134318
Same as above plus superheater percentage52195268
Same as above but substitute firebox area for grate area20,88121,077
Power L173917636
Power MT566.18584.95

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