For the first use (1905–1907) of FS Class 690, see FS Class 670.
FS Class 690
FS locomotive 69001 (later 690.001)
Type and origin
Power type
Steam
Builder
Ernesto Breda (20),
Officine Meccaniche (3),
Gio. Ansaldo & C. (10)
Build date
1911–1914
Total produced
33
Specifications
Configuration:
• UIC
2′C1′ h4
Gauge
1,435 mm (4 ft 8+1⁄2 in) standard gauge
Leading dia.
1,090 mm (42.91 in)
Driver dia.
2,030 mm (79.92 in)
Trailing dia.
1,360 mm (53.54 in)
Length
13,430 mm (44 ft 3⁄4 in)
Axle load
17.1 tonnes (16.8 long tons; 18.8 short tons)
Loco weight
87.2 tonnes (85.8 long tons; 96.1 short tons)
Tender weight
49.6 tonnes (48.8 long tons; 54.7 short tons) total weight 136.8 tonnes
Fuel type
Coal
Fuel capacity
6,000 kg (13,000 lb)
Water cap.
22,000 litres (4,800 imp gal; 5,800 US gal)
Firebox:
• Grate area
3.5 m2 (38 sq ft)
Boiler pressure
12 kg/cm2 (1,180 kPa; 171 psi)
Heating surface
210 m2 (2,300 sq ft)
Superheater:
• Heating area
67 m2 (720 sq ft)
Cylinders
Four, simple
Cylinder size
450 mm × 680 mm (17.72 in × 26.77 in)
Valve gear
Walschaerts
Performance figures
Maximum speed
130 km/h (81 mph)
Power output
1,400 CV (1,030 kW; 1,380 hp)
Tractive effort
12,400 kgf (122 kN; 27,300 lbf)
The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 690 (Italian: Gruppo 690) was a 4-6-2 'Pacific' steam locomotive for express trains.
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