South Manchurian 2-10-0 Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class P/DK1 (Locobase 15021)

Data from Roy V Wright (Ed.) 1922 Locomotive Cyclopedia of American Practice, Sixth Edition (New York: Simmons-Boardman Publishing Company, 1922), 1013. See also Jim Livesey's comments in his 14 May 2008 post in the "Re: Rare film clip of An American built 2-10-0 in North Korea" thread of the Railway Preservation News blog at [], last accessed 21 January 2024. Alco-Schenectady' works numbers were 61491-61516 in June 1919.

"DK" expands to represent the transliterated phonetic "dekapoddo" or "decapod". Obviously satisfied with the power Alco's decapods brought to the SMR, the railway's own well-equipped Shahekou shops produced another 36 betwen 1921-1923.

Hauling heavy freight trains for decades, they served Japanese and later People's Republic of China for decades. One was spotted in use in 1980.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassP/DK1
Locobase ID15021
RailroadSouth Manchurian
CountryJapan
Whyte2-10-0
Number in Class62
Road Numbers1700-1725
GaugeStd
Number Built62
Builderseveral
Year1919
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)174,000 / 78,925
Engine Weight (lbs / kg)198,000 / 89,811
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)6000 / 22.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)12 / 11
Minimum weight of rail (calculated) (lb/yd / kg/m)58 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)23" x 28" / 584x711
Tractive Effort (lbs / kg)44,299 / 20093.71
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.93
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)165 / 15.33
Grate Area (sq ft / m2)50.80 / 4.72
Evaporative Heating Surface (sq ft / m2)2423 / 225.10
Superheating Surface (sq ft / m2)589 / 54.72
Combined Heating Surface (sq ft / m2)3012 / 279.82
Evaporative Heating Surface/Cylinder Volume179.95
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9652
Same as above plus superheater percentage11,582
Same as above but substitute firebox area for grate area37,620
Power L110,857
Power MT687.80

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