FS Class 940

Type and origin
Type and origin
Power type	Steam
Builder	Officine Meccaniche,; Reggiane,; Officine Meccaniche e Navali di Napoli;
Build date	1922–1924
Total produced	53

FS Class 940
FS Class 940
	FS locomotive 940.002 preserved at Piazza al Serchio
Power type
Type and origin
Power type	Steam
Builder	Officine Meccaniche,; Reggiane,; Officine Meccaniche e Navali di Napoli;
Build date	1922–1924
Total produced	53
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2T
• UIC	1′D1′ h2t
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	860 mm (33.86 in)
Driver dia.	1,370 mm (53.94 in)
Trailing dia.	1,110 mm (43.70 in)
Length	13,178 mm (43 ft 2.8 in)
Axle load	15.4 tonnes (15.2 long tons; 17.0 short tons)
Adhesive weight	61.6 tonnes (60.6 long tons; 67.9 short tons)
Loco weight	87.3 tonnes (85.9 long tons; 96.2 short tons)
Fuel type	Coal
Fuel capacity	3,500 kg (7,700 lb)
Water cap.	10,000 litres (2,200 imp gal; 2,600 US gal)
Firebox:
• Grate area	2.8 m2 (30 sq ft)
Boiler pressure	12 kg/cm2 (1.18 MPa; 171 psi)
Heating surface	152.92 m2 (1,646.0 sq ft)
Superheater:;
• Heating area	41.23 m2 (443.8 sq ft)
Cylinders	Two, outside
Cylinder size	540 mm × 700 mm (21.26 in × 27.56 in)
Valve gear	Walschaerts
Maximum speed
Performance figures
Maximum speed	65 km/h (40 mph)
Power output	980 PS (967 hp; 721 kW)
Tractive effort	13,500 kgf (132 kN; 29,800 lbf)

The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 940 (Italian: Gruppo 940) is a 2-8-2 steam tank locomotive, derived from the Class 740 tender locomotive.

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