Banshu 2-6-2 Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14224)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 49, p. 212. Works numbers were 39528-39530 in March 1913.

Locobase cannot say for sure if the Banshu Railway was one of those built under Japan's 1910 Light Railway Act (see Locobase 14223 for more information), but the little Prairie tanks were certainly small enough and light enough to qualify.


Class 7 (Locobase 14604)

Data from Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University, Vol 60, p. 77+. Works number was 52718 in December 1919 and 53267 in May 1920.

These two Prairie tanks were essentially identical, although Baldwin's specs for the second one show very slight differences in grate and firebox heating surface areas. They were slightly smaller, but heavier, than the earlier Banshu 2-6-2Ts described in Locobase 14224. Locobase isn't sure where Japan's Banshu Railway operated, but a clue in a much later article suggests it served the famed Banshu textile region, which lies north of Kakogawa and northwest of Kobe.

Principal Dimensions by Steve Llanso of Middle Run Media
Class37
Locobase ID14224 14604
RailroadBanshuBanshu
CountryJapanJapan
Whyte2-6-2T2-6-2T
Number in Class32
Road Numbers3-57, 8
Gauge3'6"3'6"
Number Built32
BuilderBaldwinBaldwin
Year19131919
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74 7.50 / 2.29
Engine Wheelbase (ft / m)20.67 / 6.30 7.50 / 2.29
Ratio of driving wheelbase to overall engine wheelbase 0.441
Overall Wheelbase (engine & tender) (ft / m)20.67 / 6.3019.75 / 6.02
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)42,000 / 19,05149,000 / 22,226
Engine Weight (lbs / kg)60,000 / 27,21663,000 / 28,576
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)650 / 2.46650 / 2.46
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)23 / 11.5027 / 13.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 111838 / 965
Boiler Pressure (psi / kPa)160 / 1100170 / 1170
High Pressure Cylinders (dia x stroke) (in / mm)12" x 18" / 305x45712" x 18" / 305x457
Tractive Effort (lbs / kg)8012 / 3634.199856 / 4470.61
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.24 4.97
Heating Ability
Tubes (number - dia) (in / mm)84 - 1.75" / 4480 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.50 / 2.599 / 2.74
Firebox Area (sq ft / m2)46 / 4.2742 / 3.90
Grate Area (sq ft / m2)12.60 / 1.17 9.20 / 0.85
Evaporative Heating Surface (sq ft / m2)369 / 34.28368 / 34.19
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)369 / 34.28368 / 34.19
Evaporative Heating Surface/Cylinder Volume156.61156.18
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation20161564
Same as above plus superheater percentage20161564
Same as above but substitute firebox area for grate area73607140
Power L129832641
Power MT469.74356.47

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