FS Class 746 FS locomotive 746.031 as preserved
Type and origin Power type Steam Builder Build date 1923–1927 Total produced 60
Specifications Configuration: • Whyte 2-8-2 • UIC 1′D1′ h4v Gauge 1,435 mm (4 ft 8+ 1 ⁄2 in ) standard gauge Leading dia. 1,110 mm (43.70 in) Driver dia.1,880 mm (74.02 in) Trailing dia. 1,125 mm (44.29 in) Length 2+ 1 ⁄2 in)Axle load 16.2 tonnes (15.9 long tons; 17.9 short tons) Loco weight 98.8 tonnes (97.2 long tons; 108.9 short tons) Tender weight 49.6 tonnes (48.8 long tons; 54.7 short tons) Total weight 149 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 4.3 m2 (46 sq ft) Boiler pressure 16 kg/cm2 (1.57 MPa; 228 psi) Heating surface 237 m2 (2,550 sq ft) Superheater: • Heating area 112 m2 (1,210 sq ft) Cylinders Four, compound High-pressure cylinder 490 mm × 680 mm (19.29 in × 26.77 in) Low-pressure cylinder 720 mm × 680 mm (28.35 in × 26.77 in) Valve gear Walschaerts , Caprotti
Performance figures Maximum speed 100 km/h (62 mph) Power output 1,750 CV (1,290 kW; 1,730 hp) at 75 km/h (47 mph) Tractive effort 14,000 kgf (137 kN; 30,900 lbf)
Career Operators Ferrovie dello Stato Numbers 746.001 – 746.050 747.001 – 747.010 → 746.101 – 746.110 Disposition Two preserved, remainder scrapped
The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 746 (Italian: Gruppo 746 ) is a class of 2-8-2 'Mikado' steam locomotive . These were the biggest steam locomotives ever built by the Ferrovie dello Stato, even though not the fastest, which were the Class 691s .
