SBB Bm 4/4

SBB Bm 4/4
Bm 4/4 18439 at Lausanne train station
Type and origin
Power typeDiesel
BuilderSLM, SAAS
Build date1960–1970
Total produced46
Specifications
Configuration:
​
 • AARB-B
 • UICBo′Bo′
Gauge1,435 mm (4 ft 8+1⁄2 in)
Length12,650–13,710 mm (41 ft 6 in – 45 ft 0 in)
Loco weight72 tonnes (70.9 long tons; 79.4 short tons)
Traction motorsFour
TransmissionDiesel electric
Performance figures
Maximum speed75 km/h (47 mph)
Power output620kw (840hp)
Career
OperatorsSBB-CFF-FFS
Numbers18401–18446
WithdrawnFrom 2006

The Bm 4/4 is a class of heavy diesel shunting locomotives built by SLM for the Swiss Federal Railways.[1] 46 examples were built between 1960 and 1970, numbered 18401 to 18446. Starting in 2006, the class was slowly being replaced by new Vossloh-built locomotives. The last SBB example was withdrawn in 2024 but a few are in use with private operators.

See also

References

  1. ^ Loosli, H. (1961). "Die neueste Entwicklung der Diesellokomotiven der SBB". Schweizerische Bauzeitung. 79 (24): 409. doi:10.5169/seals-65547. ISSN 0036-7524.
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