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The reference for locomotives and railcars

China Railway class QJ

China 1956 4717 produced
QJ 7105 on the JiTong railway Sammy King

Between 1956 and 1960, various factories in China manufactured a total of 42 prototypes of a new 2-10-2 freight locomotive, which was based on the Soviet ОР21. From 1964 onwards, series production of a total of 4,675 additional machines, which were soon referred to as QJ, began in Datong. The abbreviation here stood for “Qianjin”, which means “progress”.

They replaced the JF and FD in heavy freight service and also pulled heavy passenger trains. In addition to the stoker and mostly smoke deflectors, their features also included the distinctive air horn. Some QJs were also built in Soviet broad gauge. A chimney similar to the Giesl ejector was tested on other machines.

Although production continued until 1988, replacement with diesel locomotives began in the eighties. After steam operations on the Chinese State Railways officially ended in 2002, the last of them disappeared from the main lines in 2003. However, the private JiTong Railway used the QJ to transport coal on its 945 km long line in Inner Mongolia until 2005 and it was also used by industrial companies until around 2010. Three QJs later found their way to the USA.

Technical data

General

Property four-axle tender six-axle tender
Built 1956-1988
Manufacturers Datong
Wheel arrangement 2-10-2 (Santa Fé)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property four-axle tender six-axle tender
Length 26.01 m 29.21 m
Length loco 16.14 m
Wheelbase 15.37 m
Total wheelbase 26.26 m
Service mass 133.3 t
Adhesion mass 106 t
Total mass 220 t 253 t
Rigid wheelbase 6.40 m
Axle load 21.2 t
Water capacity 39,500 l 50,000 l

Boiler

Property four-axle tender six-axle tender
Grate area 6.8 m²
Firebox surface 32.5 m²
Tube heating surface 222.8 m²
Evaporative heating surface 255.3 m²
Superheater surface 144.1 m²
Total heating surface 399.4 m²

Power plant

Property four-axle tender six-axle tender
Driver diameter 1,500 mm
Boiler pressure 14.7 bar
Expansion type simple expansion
Cylinders two, 650 x 800 mm

Power

Property four-axle tender six-axle tender
Power source steam
Indicated power 2,192 kW (2,980 PS)
Top speed 80 km/h
Starting effort 281.6 kN

Calculated values

Property four-axle tender six-axle tender
Factor of adhesion 1 : 3.69
Optimal speed 48 km/h
Power-to-weight ratio 16.4 kW/t
Heating Surface Equivalent 706.0 m²
Cylinder volume/HSE 1 : 752.02
Adhesive weight/Total 1 : 1.26
Tractive force/Heating surface 1 : 14.72
Grate area/Heating surface 1 : 58.74
Firebox/Tube surface 1 : 6.86
Total/Superheater 1 : 1.77
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