Nanwa 2-6-2 Locomotives in Japan


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 2912)

Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899). See also Consul-General Gowey, "Length of Railways in Japan as of July 31", letter of 24 August 1898, in Consular Reports - December 1898, Volume LVIII, No. 219, US House of Representatives, 55th Congress, 2nd Session, Doc. No. 565, Part 4 (Washington, DC: GPO, 1898), p. 565. Works numbers were 2710-2711 in October 1896.

Very similar to the Koya tank engine exported to Japan by Brooks a year later. In both, the subframe stops short of the cylinders, which are bolted directly to the smokebox saddle.

The Nanwa Railway (Naniwa in CG Gowey's report) had completed all 16.6 miles (26.7 km) of its authorized length by 31 July 1898.

Principal Dimensions by Steve Llanso of Sweat House Media

Classunknown
Locobase ID2912
RailroadNanwa
CountryJapan
Whyte2-6-2T
Number in Class2
Road Numbers4-5
Gauge3'6"
Number Built2
BuilderBrooks
Year1896
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.33 / 3.15
Engine Wheelbase (ft / m)23.67 / 7.21
Ratio of driving wheelbase to overall engine wheelbase 0.44
Overall Wheelbase (engine & tender) (ft / m)23.67 / 7.21
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)74,000 / 33,566
Engine Weight (lbs / kg)94,000 / 42,638
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)94,000 / 42,638
Tender Water Capacity (gals / ML)1200 / 4.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.50 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 1219
Boiler Pressure (psi / kPa)150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)15" x 22" / 381x559
Tractive Effort (lbs / kg)13,148 / 5963.84
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.63
Heating Ability
Tubes (number - dia) (in / mm)210 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.33 / 2.84
Firebox Area (sq ft / m2)87.20 / 8.10
Grate Area (sq ft / m2)15.20 / 1.41
Evaporative Heating Surface (sq ft / m2)982 / 91.26
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)982 / 91.26
Evaporative Heating Surface/Cylinder Volume218.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2280
Same as above plus superheater percentage2280
Same as above but substitute firebox area for grate area13,080
Power L13782
Power MT338.02

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