SLM FO Deh 4/4 I

Built by BBC, SIG, SLM

Top speed

60 km/h

37 mph

Power output

1,032 kW

1,384 hp

Weight

48.3 t

106,483 lb

Length

16.9 m

55 ft 5 in

Track gauge

1,000 mm

Metre gauge

Years built

1972

5 units

Overview of the SLM FO Deh 4/4 I

Discover the powerful FO Deh 4/4 I, an iconic electric locomotive built by BBC, SIG, and SLM since 1972. Perfect for narrow-gauge railways with a top speed of 60 km/h and a 1000 mm track gauge.

This robust machine, originally in service with the Furka Oberalp Bahn (FO) and later the Matterhorn-Gotthard-Bahn (MGB), features a classic design and a Bo'zz Bo'zz axle arrangement. Measuring 16.9 meters in length, it's an impressive sight.

Weighing 48.3 tons, with an impressive power output of 1032 kW and a tractive effort of 118 kN, the FO Deh 4/4 I is a true workhorse. It's designed for 11 kV AC 16.7 Hz electrical systems.

This locomotive represents a significant chapter in Swiss narrow-gauge railway history. Its reliability and strength make the FO Deh 4/4 I a valued and iconic piece of rolling stock.

SLM FO Deh 4/4 I technical specifications

	Value	Imperial / US
Built by	BBC, SIG, SLM · 19725 units
Top speed	60 km/h37 mph	37 mph
Power output	1,032 kW1,384 hp	1,384 hp
Tractive effort	118 kN26,527 lbf	26,527 lbf
Electric systems	11 kV AC 16.7 Hz
Track gauge	1,000 mmMetre gauge3 ft 3⅜ in	3 ft 3⅜ in
UIC axle arrangement	Bo'zz Bo'zz
Length	16.9 m55 ft 5 in	55 ft 5 in
Weight	48.3 t106,483 lb	106,483 lb