Sanyo 2-4-2 Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class Class 8 K Minami (Locobase 12152)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 19, p. 254 . See also "JGR Class 5060" in Steam Locomotives, Locomotive Wiki at [], last accessed 21 January 2024.. Works number was 14239 in June 1895.

Double-ender passenger engine delivered as a Vauclain compound with 8" (203 mm) piston valves.

Based on the Locomotive Wiki description, this locomotive remained a compound until its retirement in 1919.


Class unknown (Locobase 5413)

Data from "A Tank Locomotive for Japan," Railroad & Engineering Journal, Volume 64, No 12 (December 1890), p. 576. Works numbers were 1298-1301 in 1890.

Typical small British tank engine of late 19th-century vintage. Boiler pressure is an estimate.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassClass 8 K Minamiunknown
Locobase ID12152 5413
RailroadSanyoSanyo
CountryJapanJapan
Whyte2-4-22-4-2T
Number in Class14
Road Numbers39/5060
Gauge3'6"3'6"
Number Built14
BuilderBurnham, Williams & CoVulcan Foundry
Year18951890
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)19.67 / 6
Ratio of driving wheelbase to overall engine wheelbase 0.61
Overall Wheelbase (engine & tender) (ft / m)19.67 / 6
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)49,000 / 22,226
Engine Weight (lbs / kg)78,400 / 35,562
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)78,400 / 35,562
Tender Water Capacity (gals / ML)2400 / 9.091000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 152452 / 1321
Boiler Pressure (psi / kPa)180 / 12.40140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)10" x 22" / 254x55914" x 20" / 356x508
Low Pressure Cylinders (dia x stroke) (in / mm)17" x 22" / 432x559
Tractive Effort (lbs / kg)8336 / 3781.158971 / 4069.18
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.88
Heating Ability
Tubes (number - dia) (in / mm)161 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11 / 3.35
Firebox Area (sq ft / m2)86.90 / 8.0870 / 6.51
Grate Area (sq ft / m2)13.50 / 1.2512 / 1.12
Evaporative Heating Surface (sq ft / m2)889 / 82.62724 / 67.29
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)889 / 82.62724 / 67.29
Evaporative Heating Surface/Cylinder Volume444.53203.18
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation24301680
Same as above plus superheater percentage24301680
Same as above but substitute firebox area for grate area15,6429800
Power L141223657
Power MT370.92

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