Unspecified 2-8-2 Locomotives in Korea

Class Details by Steve Llanso of Sweat House Media

Class Nakiha/Hyouki 8 (Locobase 3081)

Drawn from the North & South Korean Locomotives Website ([]), although the listing is a little confusing. The author credits Yuuji Oikawa with the information on earlier classes and reproduces a table that refers to these narrow-gauge engines as Hiyouki-8. Yet he also credits Oikawa with a table of specifications in which the class is referred to as the Nakiha class.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassNakiha/Hyouki 8
Locobase ID3081
Number in Class
Road Numbers
Number Built
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)69,445 / 31,500
Engine Weight (lbs / kg)91,932 / 41,700
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)91,932 / 41,700
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)29 / 14.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)31.50 / 800
Boiler Pressure (psi / kPa)201.40 / 13.90
High Pressure Cylinders (dia x stroke) (in / mm)15" x 16.5" / 381x419
Tractive Effort (lbs / kg)20,176 / 9151.69
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.44
Heating Ability
Tubes (number - dia) (in / mm)86 - 1.77" / 45
Flues (number - dia) (in / mm)12 - 4.76" / 121
Flue/Tube length (ft / m) 9.51 / 2.90
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)19.37 / 1.80
Evaporative Heating Surface (sq ft / m2)747 / 69.42
Superheating Surface (sq ft / m2)138 / 12.83
Combined Heating Surface (sq ft / m2)885 / 82.25
Evaporative Heating Surface/Cylinder Volume221.35
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3901
Same as above plus superheater percentage4525
Same as above but substitute firebox area for grate area
Power L1
Power MT

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