Hunan Mining Bureau 0-4-0 Locomotives in China

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 14625)

Data from DeGolyer, Volume 60, pp. 154. Works number was 46896 in November 1917.

This skinny-gauge mining locomotive's specification included a frequent advisement to make "all springs to be one plate heavier than usual". Other information concerned the service the engine was to perform: "Locomotive to haul a train of 12 ore cars, the total weight of car and ore to be 3 tons each, a distance of three miles (4.8 km), the run to be made in about 15 minutes." Maximum grade on this lines was about 2%.

(Marshall valve gear was an adaptation of Walschaert's gear for very small locomotives.)

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID14625
RailroadHunan Mining Bureau
Number in Class1
Road Numbers
Gauge60 cm
Number Built1
Valve GearMarshall
Locomotive Length and Weight
Driver Wheelbase (ft / m)4 / 1.22
Engine Wheelbase (ft / m)4 / 1.22
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)4 / 1.22
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)18,200 / 8255
Engine Weight (lbs / kg)18,200 / 8255
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)18,200 / 8255
Tender Water Capacity (gals / ML)175 / 0.66
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)15 / 7.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)23 / 584
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)8" x 12" / 203x305
Tractive Effort (lbs / kg)4825 / 2188.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.77
Heating Ability
Tubes (number - dia) (in / mm)56 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)7 / 2.13
Firebox Area (sq ft / m2)21.10 / 1.96
Grate Area (sq ft / m2) 4.90 / 0.46
Evaporative Heating Surface (sq ft / m2)198 / 18.39
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)198 / 18.39
Evaporative Heating Surface/Cylinder Volume283.61
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation833
Same as above plus superheater percentage833
Same as above but substitute firebox area for grate area3587
Power L12833
Power MT686.34

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