Hokkaido Colliery and Railway CompanyJNR 4-4-0 Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class 68 / 5800 (Locobase 12770)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 27, p. 225. Works numbers were 25158-25160 in February 1905.

Principal Dimensions by Steve Llanso of Sweat House Media

Class68 / 5800
Locobase ID12770
RailroadHokkaido Colliery and Railway CompanyJNR
CountryJapan
Whyte4-4-0
Number in Class3
Road Numbers68-70 / 5800-5802
Gauge3'6"
Number Built3
BuilderBurnham, Williams & Co
Year1905
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13
Engine Wheelbase (ft / m)20.83 / 6.35
Ratio of driving wheelbase to overall engine wheelbase 0.34
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)52,360 / 23,750
Engine Weight (lbs / kg)78,600 / 35,652
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)2400 / 9.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 22
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)15,474 / 7018.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.38
Heating Ability
Tubes (number - dia) (in / mm)180 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11 / 3.35
Firebox Area (sq ft / m2)95.40 / 8.87
Grate Area (sq ft / m2)16.90 / 1.57
Evaporative Heating Surface (sq ft / m2)1122 / 104.28
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1122 / 104.28
Evaporative Heating Surface/Cylinder Volume200.89
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2704
Same as above plus superheater percentage2704
Same as above but substitute firebox area for grate area15,264
Power L14123
Power MT347.20

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