SLM Ge 4/4 I

Built by BBC, MFO, SLM

Top speed

80 km/h

50 mph

Power output

1,184 kW

1,588 hp

Weight

48 t

105,822 lb

Length

12.1 m

39 ft 8 in

Track gauge

1,000 mm

Metre gauge

Years built

1947–1953

10 units

Overview of the SLM Ge 4/4 I

Discover the Ge 4/4 I, a classic electric locomotive that has been a reliable workhorse for the Rhaetian Railway in Switzerland.

Built between 1947 and 1953 by renowned manufacturers BBC, MFO, and SLM, this iconic machine boasts 1184 kW of power and can reach speeds of up to 80 km/h. Its 1000 mm gauge is perfectly suited for navigating the challenging alpine routes.

With a length of 12.1 meters and a weight of 48 tons, the Ge 4/4 I offers a robust and efficient performance. It operates on an 11 kV AC 16.7 Hz electric system, providing a substantial tractive effort of 142 kN, making it ideal for both freight and passenger services on winding mountain lines.

Classified with a Bo'Bo' wheel arrangement, the Ge 4/4 I is a testament to Swiss engineering excellence. Its enduring design and capabilities have ensured its faithful service to the Rhaetian Railway, contributing significantly to the operational efficiency and scenic beauty of the alpine rail network.

SLM Ge 4/4 I technical specifications

	Value	Imperial / US
Built by	BBC, MFO, SLM · 1947–195310 units
Top speed	80 km/h50 mph	50 mph
Power output	1,184 kW1,588 hp	1,588 hp
Tractive effort	142 kN31,923 lbf	31,923 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'Bo'
Length	12.1 m39 ft 8 in	39 ft 8 in
Width	2.65 m8 ft 8 in	8 ft 8 in
Height	3.95 m13 ft 0 in	13 ft 0 in
Weight	48 t105,822 lb	105,822 lb