China Railway class SY
China 1960 1820 produced
These Mikados were based on the JF6 and were developed for industrial tasks. With a construction period up to 1999, they were the last large series-built steam locomotives in the world. There are reports that some locomotives were still in use in 2016 in open-pit mines or in heavy industry companies. Accordingly, an extraordinarily large number have survived to this day. Between 1989 and 1991 three US tourist railways ordered brand new locomotives of this type, one of which was lost at sea. One machine was also delivered to South Korea in 1994.
Technical data
General
- Built
- 1960-1999
- Manufacturers
- Tangshan
- Wheel arrangement
- 2-8-2 (Mikado)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 21.60 m
- Wheelbase
- 9.53 m
- Service mass
- 88 t
- Adhesion mass
- 70 t
- Total mass
- 142 t
- Rigid wheelbase
- 4.41 m
- Axle load
- 17.5 t
- Water capacity
- 25,000 l
- Fuel capacity
- 9.5 t (coal)
Boiler
- Grate area
- 4.5 m²
- Firebox surface
- 17.4 m²
- Tube heating surface
- 154.6 m²
- Evaporative heating surface
- 172 m²
- Superheater surface
- 42.8 m²
- Total heating surface
- 214.8 m²
Power plant
- Driver diameter
- 1,370 mm
- Boiler pressure
- 13.8 bar
- Expansion type
- simple expansion
- Cylinders
- two, 530 x 710 mm
Power
- Power source
- steam
- Indicated power
- 1,103 kW (1,500 PS)
- Top speed
- 80 km/h
- Starting effort
- 170.8 kN
Calculated values
- Factor of adhesion
- 1 : 4.02
- Optimal speed
- 40 km/h
- Power-to-weight ratio
- 12.5 kW/t
- Heating Surface Equivalent
- 344.6 m²
- Cylinder volume/HSE
- 1 : 909.11
- Adhesive weight/Total
- 1 : 1.26
- Tractive force/Heating surface
- 1 : 16.60
- Grate area/Heating surface
- 1 : 47.73
- Firebox/Tube surface
- 1 : 8.89
- Total/Superheater
- 1 : 4.02
