Sanyo 2-6-0 Locomotives in Japan

Class Details by Steve Llanso of Sweat House Media

Class 111 (Locobase 12644)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 25, .p 118. Works number was 21545 in January 1903.

In addition to a set of Vauclain cylinders (2 sets of an HP and an LP cylinder, each served by a common 10 1/2"-diameter piston valve), this Mogul had a Vanderbilt boiler. For a full description of this understandably rare variation on the traditional Stephenson boiler, see Locobase 4104; the most radical part was the firebox, with its cylindrical shape and internal corrugations.

Although the result was a big boiler for a Japanese road at the time, experience elsewhere suggests that this wasn't a very successful divergence from the norm. Redesignated 8250 by JNR in 1907-1909, the engine only lasted until 1919.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID12644
Number in Class1
Road Numbers111 / 112 /8250
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.50 / 3.81
Engine Wheelbase (ft / m)20.58 / 6.27
Ratio of driving wheelbase to overall engine wheelbase 0.61
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)86,000 / 39,009
Engine Weight (lbs / kg)100,000 / 45,359
Tender Loaded Weight (lbs / kg)54,000 / 24,494
Total Engine and Tender Weight (lbs / kg)154,000 / 69,853
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)48 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)13" x 24" / 330x610
Tractive Effort (lbs / kg)13,790 / 6255.05
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.24
Heating Ability
Tubes (number - dia) (in / mm)276 - 1.625" / 41
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.08 / 3.07
Firebox Area (sq ft / m2)69.50 / 6.46
Grate Area (sq ft / m2)20 / 1.86
Evaporative Heating Surface (sq ft / m2)1244 / 115.61
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1244 / 115.61
Evaporative Heating Surface/Cylinder Volume337.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4000
Same as above plus superheater percentage4000
Same as above but substitute firebox area for grate area13,900
Power L17194
Power MT553.26

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Wes Barris