Hokkaido Colliery and Railway Company/JNR 2-6-0 Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class 11 / 7200 (Locobase 10962)

Data from []. See also DeGolyer, Volume 16, p. 115 [appears in list of specifications, but not in actual volume]; Volume 19, p. 93; and Volume 20, p. 191. Works numbers were 11203-11206 in September 1890; 12063, 12069, 12076, 12080-12081, 12083 in July 1891; 13969-13970 in March 1894; 15024-15027 in August 1896; 15073 in October 1896; 15145-15150 in December 1896; 15164-15165 in January 1897.

1896-1897 batches had their boilers pressed to 160 psi. Ran on rails weighing 45 lb/yard (22.5 kg/metre).

Principal Dimensions by Steve Llanso of Sweat House Media

Class11 / 7200
Locobase ID10962
RailroadHokkaido Colliery and Railway Company/JNR
CountryJapan
Whyte2-6-0
Number in Class25
Road Numbers7200-7224
Gauge3'6"
Number Built25
BuilderBurnham, Parry, Williams & Co
Year1890
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)17.68 / 5.39
Ratio of driving wheelbase to overall engine wheelbase 0.68
Overall Wheelbase (engine & tender) (ft / m)37.42 / 11.41
Axle Loading (Maximum Weight per Axle) (lbs / kg)17,020 / 7720
Weight on Drivers (lbs / kg)47,708 / 21,640
Engine Weight (lbs / kg)57,915 / 26,270
Tender Loaded Weight (lbs / kg)32,827 / 14,890
Total Engine and Tender Weight (lbs / kg)90,742 / 41,160
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)27 / 13.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42.10 / 1069
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)14" x 18" / 356x457
Tractive Effort (lbs / kg)9972 / 4523.23
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.78
Heating Ability
Tubes (number - dia) (in / mm)161 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.25 / 2.51
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)11.10 / 1.03
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1554
Same as above plus superheater percentage1554
Same as above but substitute firebox area for grate area
Power L1
Power MT

All material Copyright © SteamLocomotive.com
Wes Barris