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The Ferrovie dello Stato (FS; Italian State Railways) Class 740 (Italian : Gruppo 740) is a class of 2-8-0 'Consolidation' steam locomotives.
The FS Class 740 locomotives were designed as the simple expansion and superheated version of the earlier FS Class 730; after the success of the FS Class 640. The first locomotives were built in 1911 and production continued (albeit with a long interruption caused by World War I) through to late 1923. In total, 470 were built, making the Class 740 the most numerous locomotive to be built for the Ferrovie dello Stato.
The first locomotives of the class were built with right-hand drive, but from 740.204 onwards this was changed to left-hand drive; some had six-wheeled tenders while others had bogeyed tenders giving a higher water capacity. [1]
Built for heavy freight work, the Class 740 saw service across the whole FS network, with virtually any locomotive shed having had some of them assigned to it at some point; other than freight trains, they were also usually employed for passenger services on secondary lines. Having been built for wide route availability (and therefore requiring a low axle load), they are generally considered successful locomotives, well-suited for the role they were built for, although some have criticised their rather poor steaming. Although their official top speed was set at 65 km/h (40 mph), several locomotives have proved capable of reaching higher speeds of around 80 km/h (50 mph).
The Class 740 remained in active service until the end of regular Italian steam in the 1970s. Some of the class were still assigned to various sheds as reserve motive power into the early 1990s. [2]
In 1921, locomotive 740.324 became the first FS locomotive to be fitted experimentally with Caprotti valve gear; the results were satisfactory, and locomotives 740.440–740.445 were modified during construction with the new valve gear and were classified in the separate Class 741, to be renumbered in 1930 as 740.691-697. An improved valve gear was fitted in 1932 to 740.352, which was renumbered 740.852; the valve gear was replaced by standard Walschaerts valve gear in 1955, and the remaining locomotives with Caprotti valve gear (which, although more efficient, required more refined maintenance) were withdrawn by the 1960s.
In 1942, five 740 (numbers 339, 367, 392, 396 and 405) were rebuilt with a Franco-Crosti boiler, and fitted with a streamlined casing (more for aesthetical reasons than for any aerodynamic advantages). In 1951, these locomotives (with the casing removed) were renumbered into the FS Class 743, and 88 more were rebuilt until 1953. A modified version, with a single pre-heater under the boiler (instead of two placed alongside it), was classified as FS Class 741, and 81 of them were rebuilt between 1958 and 1960.
Forty-nine Class 740 locomotives have survived into preservation. Three of them (the 740.278, 293 and 423) are currently operational and available for heritage trains, while others are under or awaiting restoration. [3]
The Caprotti valve gear is a type of steam engine valve gear invented in the early 1920s by Italian architect and engineer Arturo Caprotti. It uses camshafts and poppet valves rather than the piston valves used in other valve gear. While basing his design on automotive valves, Caprotti made several significant departures from this design to adapt the valves for steam. Having agreed a joint-venture with Worcester-based engineering company Heenan & Froude from 1938, Heenan & Froude fully acquired Caprotti post-World War II in 1947.
The Ferrovie dello Stato Class 625 is a class of 2-6-0 'mogul' steam locomotives in Italy. The class is commonly known by the nickname Signorine, or Signorina in the singular, because of their perceived grace and beauty compared to other locomotives.
The Ferrovie dello Stato Class 685 is a class of 2-6-2 'Prairie' express train steam locomotives. These are colloquially known as Regine, mirroring their fame as one of the most successful and appreciated Italian steam locomotives.
The Ferrovie dello Stato Italiane Class 691 is a class of 4-6-2 'Pacific' locomotives; they were the fastest and most powerful locomotives ever built for the Italian railways.
The Ferrovie dello Stato Class 640 is a class of 2-6-0 'Mogul' steam locomotives in Italy. Commonly nicknamed "Signorine", a nickname shared with the similar Class 625, these locomotives were the first superheated steam locomotives in Italy.
The Rete Adriatica Class 500, classified after 1905 in the Ferrovie dello Stato Italiane as Class 670 was an unorthodox and iconic cab forward 4-6-0 (2'C) steam locomotive.
The Ferrovie dello Stato Italiane Class 746 is a class of 2-8-2 'Mikado' steam locomotive. These were the biggest locomotives ever built by the Ferrovie dello Stato, even though not the fastest, which were the Class 691s.
The Ferrovie dello Stato Italiane Class 470 is a 0-10-0 steam locomotive.
The Ferrovie dello Stato Class 480 is a 2-10-0 steam locomotive.
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.
Is Class 940 Class 940 is a 2-8-2 steam tank locomotive. Is steam locomotive On the Nene Valley Railway That's For Anniversary.
The Ferrovie dello Stato Italiane Class 552, formerly Rete Adriatica Class 180 bis, is a 4-4-0 steam locomotive; it was the final development in Italy of the 'American' express locomotive type.
The Ferrovie dello Stato Italiane Class 600, formerly Rete Adriatica Class 380 and Società per le Strade Ferrate Meridionali Class 380, is a 2-6-0 'Mogul' steam locomotive; it is considered by some as the first Italian modern steam locomotive.
The Ferrovie dello Stato Italiane Class 835 is a 0-6-0T steam locomotive; it was the standard steam shunter of the FS.
The Ferrovie dello Stato Italiane Class 290, formerly the Rete Adriatica Class 350 bis, is a 0-6-0 steam locomotive.
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.
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.
The Ferrovie dello Stato Class 744 is a class of 2-8-0 steam locomotives; they were the last orthodox steam locomotives built for the FS.
