MLW RS-1

Built by ALCo, MLW

Top speed

105 km/h

65 mph

Power output

746 kW

1,000 hp

Length

16.91 m

55 ft 6 in

Track gauge

1,435 mm

Standard gauge

Years built

1941–1960

469 units

Axle arrangement

Bo'Bo'

Overview of the MLW RS-1

Discover the enduring legacy of the RS-1 diesel locomotive.

This versatile engine, built by ALCo and MLW between 1941 and 1960, boasts a powerful ALCo 539T S6 prime mover delivering 746 kW of power output.

With a top speed of 105 km/h and a substantial tractive effort of 180 kN, the RS-1 has served numerous railroads across the United States, including the Black River & Western, Green Mountain Railroad, and Washington Terminal Company.

Its robust construction, with a length of 16.91 meters and a standard gauge of 1435 mm, makes it a reliable workhorse for various rail operations.

MLW RS-1 technical specifications

	Value	Imperial / US
Built by	ALCo, MLW · 1941–1960469 units
Top speed	105 km/h65 mph	65 mph
Power output	746 kW1,000 hp	1,000 hp
Tractive effort	180 kN40,466 lbf	40,466 lbf
Prime mover	ALCo 539T S6
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
UIC axle arrangement	Bo'Bo'
Length	16.91 m55 ft 6 in	55 ft 6 in
Width	3.05 m10 ft 0 in	10 ft 0 in
Height	4.39 m14 ft 5 in	14 ft 5 in