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JNR's steam locomotive 8620 class

8620.jpg / 25.8KBytes
Jul.1970 Nagano Station.
This locomotive type was Japan's first full-scale main line express passenger train, and 672 of them were built between 1914 and 1929 for Japan National Railways (JNR) by Kisha-Seizo, Kawasaki, Hitachi, Mitsubishi, and Nippon-Sharyo. Another 15 were manufactured for the Sakhalin Agency Railroad from 1922 to 1929, and 43 from 1919 to 1928 for the Railway of the Governor-General of Taiwan during the Japanese colonial period (500 class, After Pusific war renamed Taiwan Railway Administration TRA CT150 class). Another was manufactured for a private railway. As trains became faster and heavier over time, the type 8620s became obsolete and gradually were taken off the front lines, finally being used as passenger locomotives on regional lines, for freight, and for switching until 1974. Currently, 1 of them is in dynamic preservation (refers to locomotives that have been preserved in a ready-to-operate state, and/or are still running today) at JR Kyushu, and 20 are in static preservation (refers to locomotives that are preserved in a way that does not allow them to be immediately operated, and/or that are simply on display) in various locations. Another is in static preservation at Miaoli Railway Park in Taiwan.

Data of 8620 Class
Wheel arrangement 2-6-0 Heating Surface(m2) 110.90
Loco. Weight in Working Order(ton) 48.8 Capacity of Boiler Water(m3) 4.20
Weight on Driving Wheels(ton) 41.5 Loading Capacity of Water(m3) 13.0
Tender Weight in Working Order(t) 34.5 Loading Capacity of Coal(ton) 6.0
Max Axle Weight(ton) 14.35 Height of Boiler Cube center(mm) 2,438
Diameter of Driving Wheel(mm) 1600 Length(mm) 16,765
Cylinder Dimensions(mm) 470X610 Height(mm) 3,785
Boiler Pressure(kg/cm2) 13.00 Length of Locomotive(mm) 10,547
Grate Area(m2) 1.63 Length of Tender(mm) 6,218
Built 672 Gauge 1,067mm(3'6")

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