After the end of Second World War, the Swiss Federal Railways (SBB CFF FFS) are looking to modernize their locomotives fleet for passenger traffic and replace the Ae 3/6I units.
The new locomotive had to be able to:
- tow 300-ton trains on ramps of 12‰ at a speed of 110 km/h;
- brake 300-ton trains on ramps of 38‰;
- tow 460-ton trains on ramps of 10‰ at a speed of 75 km/h.
Bern–Lötschberg–Simplon Railway (BLS) locomotive Ae 4/4 is a source of inspiration.
The chosen locomotive for this purpose was the Re 4/4 locomotive built by Schweizerische Lokomotiv- und Maschinenfabrik (SLM) for the mechanical part and by Maschinenfabrik Oerlikon (MFO), Brown, Boveri & Cie (BBC) and Société Anonyme des Ateliers de Sécheron (SAAS) for the electrical part.
The unit cost for the locomotive was 700 000 Swiss francs.
The locomotive is equipped with a gangway connection for easier access when used in multiple control or in a shuttle train.
The first batch of 6x Re 4/4 I units is delivered between January 22nd and June 26th, 1946. They are registered 401 to 406.
All locomotives from this series are delivered in a green livery.
The second batch of 10x Re 4/4 I units is delivered between September 17th, 1946 and April 17th, 1947. They are registered 407 to 416.
The third batch of 10x Re 4/4 I units is delivered between May 31st and November 18th, 1948. They are registered 417 to 426.
NB: A second series registered Re 4/4I 427 - 450 is delivered between 1950 and 1951. These units don't have the gangway connection.
Unit Re 4/4I 416 receives a new light green color scheme.
As this livery is too messy, the locomotive is repainted in its original livery on December 14th, 1957.
Concerns registration number(s): 416
Unit Re 4/4I 409 receives a new cobalt blue livery.
This paint scheme is not a success so the locomotive is repainted in its original livery on July 17th, 1959.
All 26x Re 4/4I units are renumbered 10001 - 10026 between 1958 and 1960.
All units receive the new red livery during the R3 revision from 1984.
These units are retired from regular service between 1996 and 1998.
Latest update on the 8th of August 2020 at 19:04
Contributor(s): Tudor C.