FS Class 640 II

Specifications
Specifications
Configuration:;
• UIC	1′C h2
Gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Leading dia.	960 mm (37.80 in)
Driver dia.	1,850 mm (72.83 in)
Length	9,670 mm (31 ft 8+3⁄4 in)
Axle load	14.7 t (14.5 long tons; 16.2 short tons)
Loco weight	54.5 t (53.6 long tons; 60.1 short tons)
Tender weight	35.3 t (34.7 long tons; 38.9 short tons)
Total weight	89,8 tons
Fuel type	Coal
Fuel capacity	6,000 kg (13,000 lb)
Water cap.	15,000 L (3,300 imp gal; 4,000 US gal)
Firebox:
• Grate area	2.42 m2 (26.0 sq ft)
Boiler pressure	12 kg/cm2 (1.18 MPa; 171 psi)
Heating surface	108.5 m2 (1,168 sq ft)
Superheater:;
• Heating area	33.5 m2 (361 sq ft)
Cylinders	Two
Cylinder size	540 mm × 700 mm (21.26 in × 27.56 in)
Valve gear	Walschaerts, Caprotti

Type and origin
Type and origin
Power type	Steam
Builder	Berliner Maschinenbau (48),; Ernesto Breda, (103); Costruzioni Meccaniche di Saronno (18),; Gio. Ansaldo & C.;
Build date	1907-1911
Total produced	173

FS Class 640
FS Class 640
	FS locomotive 640.143 in 2012
Power type
Type and origin
Power type	Steam
Builder	Berliner Maschinenbau (48),; Ernesto Breda, (103); Costruzioni Meccaniche di Saronno (18),; Gio. Ansaldo & C.;
Build date	1907-1911
Total produced	173
Configuration:;
Specifications
Configuration:;
• UIC	1′C h2
Gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Leading dia.	960 mm (37.80 in)
Driver dia.	1,850 mm (72.83 in)
Length	9,670 mm (31 ft 8+3⁄4 in)
Axle load	14.7 t (14.5 long tons; 16.2 short tons)
Loco weight	54.5 t (53.6 long tons; 60.1 short tons)
Tender weight	35.3 t (34.7 long tons; 38.9 short tons)
Total weight	89,8 tons
Fuel type	Coal
Fuel capacity	6,000 kg (13,000 lb)
Water cap.	15,000 L (3,300 imp gal; 4,000 US gal)
Firebox:
• Grate area	2.42 m2 (26.0 sq ft)
Boiler pressure	12 kg/cm2 (1.18 MPa; 171 psi)
Heating surface	108.5 m2 (1,168 sq ft)
Superheater:;
• Heating area	33.5 m2 (361 sq ft)
Cylinders	Two
Cylinder size	540 mm × 700 mm (21.26 in × 27.56 in)
Valve gear	Walschaerts, Caprotti
Maximum speed
Performance figures
Maximum speed	100 km/h (62 mph)
Power output	800 CV (588 kW; 789 hp)
Tractive effort	10,000 kgf (98.1 kN; 22,000 lbf)
Preserved
Career
Preserved	15 rebuilt (from FS Class 630)

The Ferrovie dello Stato (FS; Italian State Railways) Class 640 (Italian: Gruppo 640) is a class of 2-6-0 'Mogul' steam locomotives in Italy. Commonly nicknamed "Signorine" (Italian: 'young ladies'), a nickname shared with the similar Class 625, these locomotives were the first superheated steam locomotives in Italy.

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