FS Class ALn 668

FS ALn 668.1400
Type and origin
Builder	Fiat Ferroviaria
Build date	1954-1963
Total produced	80
Specifications
Career
Operator(s)	Ferrovie dello Stato
First run	1956

FS ALn 668.2400
Type and origin
Builder	Breda
Build date	1959-1964
Total produced	40
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.1500
Type and origin
Builder	Fiat Ferroviaria, Breda
Build date	1965-1967
Total produced	75
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.1600
Type and origin
Builder	Fiat Ferroviaria, Breda
Build date	1970-1971
Total produced	33
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.1700
Type and origin
Builder	Breda
Build date	1971-1972
Total produced	20
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.1800
Type and origin
Builder	Fiat Ferroviaria
Build date	1971-1973
Total produced	85
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.1900
Type and origin
Builder	Fiat Ferroviaria, Omeca
Build date	1975-1976
Total produced	42
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.1000
Type and origin
Builder	Fiat Ferroviaria, Omeca
Build date	1976-1979
Total produced	120
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.1200
Type and origin
Builder	Fiat Ferroviaria, Omeca
Build date	1979-1980
Total produced	60
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.3000
Type and origin
Builder	Fiat Ferroviaria, Omeca
Build date	1980-1981
Total produced	40
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.3100
Type and origin
Builder	Fiat Ferroviaria, Omeca
Build date	1980-1983
Total produced	150
Specifications
Career
Operator(s)	Ferrovie dello Stato

FS ALn 668.3300
Type and origin
Builder	Fiat Ferroviaria
Build date	1982-1983
Total produced	40
Specifications
Career
Operator(s)	Ferrovie dello Stato

The ALn 668 (Automotrice Leggera a nafta, Light Diesel motor car) series is a family of Diesel railcars built by Fiat Ferroviaria between the 1950s and the 1980s. The trains were built for the Italian public railway company Ferrovie dello Stato (FS), now Trenitalia as well as many Italian private railway operators. Types derived from the class have been built for the railway companies of other nations. Most of the trains are still in service today.

The forty units of the 2400 series were built entirely by Breda in Milan.

The ALn 668 is considered the standard railcar of the FS. Class ALn 663 is quite similar, while maintaining the same mechanics, received a different classification exclusively for the new interior design that reduced the number of from sixty-eight to sixty-three.

Background

Lots of FS's fleet was destroyed at the end of World War II, which meant the company needed a replacement diesel railcar. The essential characteristic of the new rolling stock was the provision of the drive motor under the floor, so as to leave the maximum space available for passengers.

The railcars RALn 60, built for the modernization of passenger service on the lines of the Sicilian FS Narrow Gauge railway, were tested from January 1950 and was the start of the long line of railcars built by Fiat from the war until the first half of the nineties.

Although the behavior of new railcars was overall satisfactory, availability and maintenance costs were still very far from the objectives considered within the Service Material and Traction for FS, which had long aspired to the creation of a standard Italian railcar standard.

By building on the experience already acquired in 1954 initiated the project for a new standard railcar, for which the FS established clearly the fundamental objectives: high reliability, ease of conduct and learning, maintenance and repair well-programmable, overall costs contained defined and relatively modest, given the kind of services that diesel railcars were called upon to play in a network where it had planned the electrification of all main lines.

The only binding conditions imposed on the builders were that the railcar was twin engine, that the mass adherent was not lower than 50% of the total, the engines were placed under the floor and which exceed the test UIC 100 hours.

The manufacturers of railway equipment able to meet the demand of the Service Material and Traction were at the time Breda, OM and FIAT. Breda, committed to the realization of railcars TEE answered only in 1959; OM, intent to reissue the ALn 772 and preparing ALn 773 defected the offer, but was later involved in the construction of the FIAT trailers and foreign versions of ' ALn 668; FIAT, although busy with various productions (including ALn 64 per rack for the Paola-Cosenza line) quickly responded to the call of FS, also because with its industrial potential was the only company able to operate without constraints due to licenses. Added to this advantage FIAT added the ability to use diesel engines derived from production in large series of trucks, a choice that proved decisive for the future success of ALn 668 resulting in a considerable saving in initial cost, ensuring maximum reliability and an efficient care service with high availability of spare parts.

General description

These diesel railcars were built during the period 1954-1983. 787 vehicles were built in 12 series.

External links

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