FS Class 735

Last updated
FS Class 735
Italy Rail 001 Bergamo.jpg
Type and origin
Power typeSteam
Builder
Build date1917–1922
Total produced400
Specifications
Configuration:
   UIC 1′D h2
Gauge 1,435 mm (4 ft 8 12 in) standard gauge
Leading dia. 840 mm (33.07 in)
Driver dia.1,370 mm (53.94 in)
Length10,595 mm (34 ft 9 18 in)
Axle load 14.8 tonnes (14.6 long tons; 16.3 short tons)
Loco weight63.1 tonnes (62.1 long tons; 69.6 short tons)
Tender weight50.2 tonnes (49.4 long tons; 55.3 short tons)
Fuel type Coal
Fuel capacity6,000 kg (13,000 lb)
Water cap22,300 litres (4,900 imp gal; 5,900 US gal)
Firebox:
  Firegrate area
3.17 m2 (34.1 sq ft)
Boiler pressure12 kg/cm2 (1.18 MPa; 171 psi)
Heating surface162.07 m2 (1,744.5 sq ft)
Superheater:
  Heating area42.68 m2 (459.4 sq ft)
Cylinders 540 mm × 700 mm (21.26 in × 27.56 in), two
Valve gear Walschaerts
Performance figures
Maximum speed65 km/h (40 mph)
Power output1,080 CV (794 kW; 1,070 hp)
Tractive effort 14,700 kgf (144 kN; 32,400 lbf)
Career
Number in class393

The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 735 (Italian: Gruppo 35) is a 2-8-0 'Consolidation' steam locomotive.

Contents

Design and construction

The Class 735 was designed as a response of the situation developed during the years of World War I; the Italian railways needed more locomotives for freight trains, but there was no possibility of building them at home or in war-ravaged Europe. It was therefore decided to have them built overseas.

Using the Class 740 design as a pattern (but allowing for alterations in order to avoid delays in the production), [1] an order for 105 (later raised to 115) locomotives was given to Alco in 1916, and the following year they were completed, disassembled and sent by cargo ship to Italy (with only 108 reaching Italy, however, as a U-boat sank the ship carrying the remaining seven). A subsequent order for another 285 locomotives, with some minor improvements in the boiler, was given in 1918 to the Montreal Locomotive Works.

Their American origin showed in their being fitted with a Bissel truck instead of the Italian bogie widespread in Italy, and with the locomotives of the first batch having fireboxes made of steel rather than copper.

Operations

Nicknamed "Wilson" (in honour of US president Woodrow Wilson) throughout their career, the Class 735 locomotives proved very successful; they were considered by engineers to be somewhat more powerful than the 740 Class, although their consumes were accordingly higher. Pulling mainly freight trains but often also passenger trains, they operated until the 1960s, when mass withdrawals of the Class began, until the last one was retired in 1971. [1]

Preservation

Two Class 735 locomotives survived into preservation, 735.128, preserved as a static exhibit at the Pietrarsa railway museum, and 735.155, in possession of the Museo Ferroviario Piemontese, awaiting restoration.

Trivia

One Class 735 locomotive prominently appeared in the 1965 film Von Ryan's Express, starring Frank Sinatra.

Related Research Articles

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The Ferrovie dello Stato Class 740 is a class of 2-8-0 'Consolidation' steam locomotives.

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FS Class 640 II

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FS Class 690 II

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FS Class 470

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FS Class 480 Italian steam locomotive

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FS Class 650

The Ferrovie dello Stato Italiane Class 650, formerly SFAI1181-1200 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.

FS Class 940

The Ferrovie dello Stato Italiane Class 940 is a 2-8-2 steam tank locomotive, derived from the Class 740 tender locomotive.

FS Class 680

The Ferrovie dello Stato Italiane Class 680 is a 2-6-2 express steam locomotive; it was the direct ancestor of the very successful and appreciated Class 685.

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FS Class 600

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FS Class 835

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FS Class 420

The Ferrovie dello Stato Italiane Class 420, formerly SFAI Class 1200, Rete Adriatica Class 420 and Rete Mediterranea Class 480, was a 0-8-0 steam locomotive.

The Ferrovie dello Stato Italiane Class 310, formerly Rete Mediterranea Class 380, was a 0-6-0 steam locomotive; they were the first Italian as-built compound locomotives.

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The Ferrovie dello Stato Class 741 is a class of 2-8-0 'Consolidation' steam locomotives, rebuilds from the FS Class 740 with a Franco-Crosti boiler; it was the last class of steam locomotives introduced in Italy.

The Ferrovie dello Stato Class 745 was a class of 2-8-0 'Consolidation' steam locomotives.

References