China Railways SY

SY
上游
SY-1721 idling at the Tangshan Works, December 2005
Type and origin
Power typeSteam
BuilderTangshan Railway Vehicle (Mostly)
Build date1960–1999
Total produced1,820
Specifications
Configuration:
 • Whyte2-8-2
 • UIC1′D1′
Gauge1,435 mm (4 ft 8+12 in)
Driver dia.1,370 mm (53.94 in)*
Length21.6 m (70 ft 10+38 in)
Loco weight142 tonnes
(140 long tons; 157 short tons)
Fuel typeCoal
Water cap.25,000 L (6,600 US gal)
Boiler pressure200 psi (1,379 kPa)
Heating surface:
 • Firebox4.5 m2 (48.44 sq ft)
Cylinders2
Cylinder size580 mm × 710 mm
(22.83 in × 27.95 in)
Valve gearWalschaerts
Valve typePiston
Performance figures
Maximum speed80 km/h (50 mph)*
Tractive effort207.66 kN (46,680 lbf)
Career
Disposition42 preserved

China Railway SY is a (Chinese: 上游; pinyin: Shàng Yóu; lit. 'Forward Position') 2-8-2 Mikado locomotive operated by the China Railway. It was built mostly by Tangshan Railway Vehicle between 1960 and 1999.