The

Ferrovie dello Stato Italiane Ferrovie dello Stato Italiane S.p.A. ( "Italian Railways of the State"; previously only Ferrovie dello Stato, hence the abbreviation FS) is Italy's national state-owned railway holding company that manages transport, infrastructure, real estat ...

(FS; Italian State Railways) Class 552 (Italian: ''Gruppo 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.

Design and construction

Last in a line of successful 4-4-0 locomotives designed in

Florence Florence ( ; it, Firenze ) is a city in Central Italy and the capital city of the Tuscany Regions of Italy, region. It is the most populated city in Tuscany, with 383,083 inhabitants in 2016, and over 1,520,000 in its metropolitan area.Bilan ...

, the Class 552 was basically an evolution of the earlier Class 545 and Class 550 locomotives, with a larger boiler and bigger cylinders. The class was initially fitted with a prototype tender similar to the definitive one, but with only of water. The first series of 24 units was built in 1890 by

Ernesto Breda Ernesto, form of the name Ernest in several Romance languages, may refer to: * ''Ernesto'' (novel) (1953), an unfinished autobiographical novel by Umberto Saba, published posthumously in 1975 ** ''Ernesto'' (film), a 1979 Italian drama loosely ba ...

and Ansaldo (12 units each); 12 more were built by Breda from 1900 to 1901.

Service

Locomotiva a vapore FS Gr 552 - 036 - Museo nazionale scienza e tecnologia Milano

The Class 552 (until 1905, when the FS were formed, classified RA 180 bis and numbered 1865–1900) were primarily assigned to the most prestigious fast passenger trains of their time, notably the ''India Mail'' or ''Peninsular Express'' (called in Italian ''Valigia delle Indie''), which was part of the P&O relation between

London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...

and

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; in Italy, this train ran the itinerary

Modane Modane (; ) is a commune in the Savoie department in the Auvergne-Rhône-Alpes region in southeastern France. The commune is in the Maurienne Valley, and it also belongs to the Vanoise National Park. It was part of the Kingdom of Sardinia unti ...

Turin Turin ( , Piedmontese: ; it, Torino ) is a city and an important business and cultural centre in Northern Italy. It is the capital city of Piedmont and of the Metropolitan City of Turin, and was the first Italian capital from 1861 to 1865. The ...

- Alessandria-

Bologna Bologna (, , ; egl, label=Emilian language, Emilian, Bulåggna ; lat, Bononia) is the capital and largest city of the Emilia-Romagna region in Northern Italy. It is the seventh most populous city in Italy with about 400,000 inhabitants and 1 ...

Ancona Ancona (, also , ) is a city and a seaport in the Marche region in central Italy, with a population of around 101,997 . Ancona is the capital of the province of Ancona and of the region. The city is located northeast of Rome, on the Adriatic ...

- Brindisi, where a ship took the passengers to

Alexandria Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...

. However, they were the swan song of the two-wheeled express locomotives in Italy, as their relatively modest performance, at , quickly became insufficient; with the introduction of more powerful locomotives with three driving wheels (such as the Class 630 or the Class 670), the Class 552 was soon relegated to secondary roles. However, unlike its predecessors (all disappeared by the 1930s), some locomotives of the class managed to survive until 1946, working around

Treviso Treviso ( , ; vec, Trevixo) is a city and '' comune'' in the Veneto region of northern Italy. It is the capital of the province of Treviso and the municipality has 84,669 inhabitants (as of September 2017). Some 3,000 live within the Ven ...

Preservation

One Class 552, the 552.036, survived into preservation; she is currently a static exhibit in the

Museo della Scienza e della Tecnologia "Leonardo da Vinci" Museo Nazionale Scienza e Tecnologia Leonardo da Vinci in Milan, dedicated to painter and scientist Leonardo da Vinci, is the largest science and technology museum in Italy. It was opened on 5 February 1953 and inaugurated by Prime Minister Alci ...

in Milan.

References

* * {{FS locos 4-4-0 locomotives 552 Gio. Ansaldo & C. locomotives Breda locomotives Railway locomotives introduced in 1890 Standard gauge locomotives of Italy Rete Adriatica steam locomotives Passenger locomotives