FS Class 680

The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 680 (Italian: Gruppo 680) is a 2-6-2 express steam locomotive; it was the direct ancestor of the very successful and appreciated Class 685.

FS Class 680
FS locomotive 680.037 as preserved
Type and origin
Power typeSteam
Builder
Build date1907–1911
Total produced151
Specifications
Configuration:
  UIC1′C1′ n4v
Gauge1,435 mm (4 ft 8+12 in)
Leading dia.960 mm (37.80 in)
Driver dia.1,850 mm (72.83 in)
Trailing dia.1,220 mm (48.03 in)
Length11,980 mm (39 ft 3+58 in)
Axle load15 tonnes (15 long tons; 17 short tons)
Loco weight70 tonnes (69 long tons; 77 short tons)
Tender weight40.5 tonnes (39.9 long tons; 44.6 short tons)
Fuel typeCoal
Fuel capacity6,000 kg (13,000 lb)
Water cap.20,000 L (4,400 imp gal; 5,300 US gal)
Firebox:
  Grate area3.5 m2 (38 sq ft)
Boiler pressure16 kg/cm2 (1.57 MPa; 228 psi)
Heating surface219.26 m2 (2,360.1 sq ft)
CylindersFour, compound
High-pressure cylinder360 mm × 650 mm (14.17 in × 25.59 in)
Low-pressure cylinder590 mm × 650 mm (23.23 in × 25.59 in)
Valve gearWalschaerts
Performance figures
Maximum speed110 km/h (68 mph)
Power output1,100 CV (809 kW; 1,080 hp)
Tractive effort9,000 kgf (88.3 kN; 19,800 lbf)
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