FS Class 650

The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 650 (Italian: Gruppo 650), formerly SFAI 1181-1200 and Rete Mediterranea 300 Class, also known as "Vittorio Emanuele II", was the first steam locomotive in continental Europe to have the 4-6-0 'Ten-Wheeler' arrangement.

SFAI 1181-1200
RM Class 3000
FS Class 650
FS locomotive 6502, later 650.002
Type and origin
Power typeSteam
Builder
  • SFAI Turin works (1),
  • Gio. Ansaldo & C. (36),
  • Maffei (13),
  • Officine Miani & Silvestri (5)
Build date1884–1896
Total produced55
Specifications
Configuration:
​
 • Whyte4-6-0
 • UIC2′C n2
Gauge1,435 mm (4 ft 8+1⁄2 in)
Leading dia.840 mm (33.07 in)
Driver dia.1,675 mm (65.94 in)
Length10,280 mm (33 ft 8+3⁄4 in)
Axle load14.2 tonnes (14.0 long tons; 15.7 short tons)
Loco weight54.1 tonnes (53.2 long tons; 59.6 short tons)
Tender weight29.9 tonnes (29.4 long tons; 33.0 short tons)
Fuel typeCoal
Fuel capacity3,500 kg (7,700 lb)
Water cap.10,000 litres (2,200 imp gal; 2,600 US gal)
Firebox:​
 • Grate area2.34 m2 (25.2 sq ft)
Boiler pressure10 kg/cm2 (981 kPa; 142 psi)
Heating surface125.4 m2 (1,350 sq ft)
CylindersTwo, outside
Cylinder size475 mm × 620 mm (18.70 in × 24.41 in)
Valve gearGooch
Performance figures
Maximum speed80 km/h (50 mph)
Power output630 CV (463 kW; 621 hp)
Tractive effort6,250 kgf (61.3 kN; 13,800 lbf)
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