FS Class 680

Specifications
Specifications
Configuration:;
• UIC	1′C1′ n4v
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	960 mm (37.80 in)
Driver dia.	1,850 mm (72.83 in)
Trailing dia.	1,220 mm (48.03 in)
Length	11,980 mm (39 ft 3+5⁄8 in)
Axle load	15 tonnes (15 long tons; 17 short tons)
Loco weight	70 tonnes (69 long tons; 77 short tons)
Tender weight	40.5 tonnes (39.9 long tons; 44.6 short tons)
Fuel type	Coal
Fuel capacity	6,000 kg (13,000 lb)
Water cap.	20,000 L (4,400 imp gal; 5,300 US gal)
Firebox:
• Grate area	3.5 m2 (38 sq ft)
Boiler pressure	16 kg/cm2 (1.57 MPa; 228 psi)
Heating surface	219.26 m2 (2,360.1 sq ft)
Cylinders	Four, compound
High-pressure cylinder	360 mm × 650 mm (14.17 in × 25.59 in)
Low-pressure cylinder	590 mm × 650 mm (23.23 in × 25.59 in)
Valve gear	Walschaerts

Type and origin
Type and origin
Power type	Steam
Builder	Ernesto Breda (91),; Gio. Ansaldo & C. (40),; Berliner Maschinenbau (20);
Build date	1907–1911
Total produced	151

FS Class 680
FS Class 680
	FS locomotive 680.037 as preserved
Power type
Type and origin
Power type	Steam
Builder	Ernesto Breda (91),; Gio. Ansaldo & C. (40),; Berliner Maschinenbau (20);
Build date	1907–1911
Total produced	151
Configuration:;
Specifications
Configuration:;
• UIC	1′C1′ n4v
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	960 mm (37.80 in)
Driver dia.	1,850 mm (72.83 in)
Trailing dia.	1,220 mm (48.03 in)
Length	11,980 mm (39 ft 3+5⁄8 in)
Axle load	15 tonnes (15 long tons; 17 short tons)
Loco weight	70 tonnes (69 long tons; 77 short tons)
Tender weight	40.5 tonnes (39.9 long tons; 44.6 short tons)
Fuel type	Coal
Fuel capacity	6,000 kg (13,000 lb)
Water cap.	20,000 L (4,400 imp gal; 5,300 US gal)
Firebox:
• Grate area	3.5 m2 (38 sq ft)
Boiler pressure	16 kg/cm2 (1.57 MPa; 228 psi)
Heating surface	219.26 m2 (2,360.1 sq ft)
Cylinders	Four, compound
High-pressure cylinder	360 mm × 650 mm (14.17 in × 25.59 in)
Low-pressure cylinder	590 mm × 650 mm (23.23 in × 25.59 in)
Valve gear	Walschaerts
Maximum speed
Performance figures
Maximum speed	110 km/h (68 mph)
Power output	1,100 CV (809 kW; 1,080 hp)
Tractive effort	9,000 kgf (88.3 kN; 19,800 lbf)

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.

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