SBB Bm 4/4

Specifications
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo′Bo′
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Length	12,650–13,710 mm (41 ft 6 in – 45 ft 0 in)
Loco weight	72 tonnes (70.9 long tons; 79.4 short tons)
Traction motors	Four
Transmission	Diesel electric

Type and origin
Type and origin
Power type	Diesel
Builder	SLM, SAAS
Build date	1960–1970
Total produced	46

SBB Bm 4/4
SBB Bm 4/4
	Bm 4/4 18439 at Lausanne train station
Power type
Type and origin
Power type	Diesel
Builder	SLM, SAAS
Build date	1960–1970
Total produced	46
Configuration:;
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo′Bo′
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Length	12,650–13,710 mm (41 ft 6 in – 45 ft 0 in)
Loco weight	72 tonnes (70.9 long tons; 79.4 short tons)
Traction motors	Four
Transmission	Diesel electric
Maximum speed
Performance figures
Maximum speed	75 km/h (47 mph)
Power output	620kw (840hp)
Operators
Career
Operators	SBB-CFF-FFS
Numbers	18401–18446
Withdrawn	From 2006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 The last SBB example was withdrawn in 2024 but a few are in use with private operators.

References

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

[1]

SBB Bm 4/4

See also

References