FS Class 420

Specifications
Specifications
Configuration:;
• UIC	D'n2
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Driver dia.	1,220 mm (48.03 in)
Length	16,320 mm (53 ft 7 in)
Axle load	14.3 tonnes (14.1 long tons; 15.8 short tons)
Loco weight	55.7 tonnes (54.8 long tons; 61.4 short tons)
Tender weight	26.7 tonnes (26.3 long tons; 29.4 short tons)
Fuel type	Coal
Fuel capacity	4,000 kg (8,800 lb)
Water cap.	9,000 L (2,000 imp gal; 2,400 US gal)
Firebox:
• Grate area	2.16 m2 (23.3 sq ft)
Boiler pressure	10 kg/cm2 (0.981 MPa; 142 psi)
Heating surface	166.63 m2 (1,793.6 sq ft)
Cylinders	Two, outside
Cylinder size	530 mm × 610 mm (20.87 in × 24.02 in)
Valve gear	Stephenson

Type and origin
Type and origin
Power type	Steam
Builder	Cockerill, Breda, Ansaldo, Miani & Venturi, Maffei, MÁVAG, Maschinenfabrik Esslingen, Henschel & Son, Lokomotivfabrik der StEG, Naples Railway Works, Pietrarsa Railway Works, Hawthorn-Guppy of Naples
Build date	1873-1905
Total produced	293

SFAI Class 1200
RA Class 420
RM Class 480
FS Class 420
SFAI Class 1200; RA Class 420; RM Class 480; FS Class 420
	An FS Class 420 locomotive
Power type
Type and origin
Power type	Steam
Builder	Cockerill, Breda, Ansaldo, Miani & Venturi, Maffei, MÁVAG, Maschinenfabrik Esslingen, Henschel & Son, Lokomotivfabrik der StEG, Naples Railway Works, Pietrarsa Railway Works, Hawthorn-Guppy of Naples
Build date	1873-1905
Total produced	293
Configuration:;
Specifications
Configuration:;
• UIC	D'n2
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Driver dia.	1,220 mm (48.03 in)
Length	16,320 mm (53 ft 7 in)
Axle load	14.3 tonnes (14.1 long tons; 15.8 short tons)
Loco weight	55.7 tonnes (54.8 long tons; 61.4 short tons)
Tender weight	26.7 tonnes (26.3 long tons; 29.4 short tons)
Fuel type	Coal
Fuel capacity	4,000 kg (8,800 lb)
Water cap.	9,000 L (2,000 imp gal; 2,400 US gal)
Firebox:
• Grate area	2.16 m2 (23.3 sq ft)
Boiler pressure	10 kg/cm2 (0.981 MPa; 142 psi)
Heating surface	166.63 m2 (1,793.6 sq ft)
Cylinders	Two, outside
Cylinder size	530 mm × 610 mm (20.87 in × 24.02 in)
Valve gear	Stephenson
Maximum speed
Performance figures
Maximum speed	45 km/h (28 mph)
Power output	620 PS (456 kW; 612 hp)
Tractive effort	11,450 kgf (112 kN; 25,200 lbf)

The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 420 (Italian: Gruppo 290), formerly SFAI Class 1200, Rete Adriatica Class 420 and Rete Mediterranea Class 480, was a 0-8-0 steam locomotive.

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