MLW RS-18

Specifications
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo'Bo'
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime mover	Alco 251B
RPM range	1000 (max)
Engine type	Four-stroke V12 diesel
Displacement	8,016 cu in (131.36 L)
Generator	DC generator
Traction motors	4 DC traction motors
Cylinders	12
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)
Transmission	Electric
Loco brake	Air, optional dynamic
Train brakes	Air

Type and origin
Type and origin
Power type	Diesel-electric
Builder	Montreal Locomotive Works
Model	RS-18
Build date	December 1956 to August 1968
Total produced	351

MLW RS-18
MLW RS-18
	BC Rail No. 629 at Lillooet, British Columbia in 1987
Power type
Type and origin
Power type	Diesel-electric
Builder	Montreal Locomotive Works
Model	RS-18
Build date	December 1956 to August 1968
Total produced	351
Configuration:;
Specifications
Configuration:;
• AAR	B-B
• UIC	Bo'Bo'
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Prime mover	Alco 251B
RPM range	1000 (max)
Engine type	Four-stroke V12 diesel
Displacement	8,016 cu in (131.36 L)
Generator	DC generator
Traction motors	4 DC traction motors
Cylinders	12
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)
Transmission	Electric
Loco brake	Air, optional dynamic
Train brakes	Air
Power output
Performance figures
Power output	1,800 hp (1,340 kW)
Locale
Career
Locale	Canada

The MLW RS-18 was an 1,800 hp (1,340 kW) diesel-electric locomotive built by Montreal Locomotive Works between December 1956 and August 1968. It replaced the RS-10 in MLW's catalogue, and production totalled 351 locomotives, to eight customers.

It was the Canadian version of the ALCO RS-11, although MLW did manufacture the RS-11 for Ferrocarriles Nacionales de México.

Canadian National Railway, by far the largest buyer of the RS-18, continued to specify the long hood as the front. By contrast, while all of Canadian Pacific Railway's RS-10s were long-hood-forward, all of their RS-18s were short-hood forward. All of CN and CP's locomotives were delivered with full-height short hoods, as were the first four Pacific Great Eastern Railway, and first Roberval and Saguenay Railway unit. The remaining production was for locomotives with a low short-hood, giving the train crew much better forward vision.

Original owners

Railway	Quantity	Road number	Notes
Canadian National Railway	225	3615–3745, 3830–3893, 3100–3129
Canadian Pacific Railway	72	8729–8800	68 of the 72 were rebuilt in to RS18u's numbered 1800 to 1868
Cartier Railway	8	101–108
International Nickel Company of Canada	3	208-2 – 208-4
Pacific Great Eastern Railway	29	587–599, 614–626, 628–630	578–599 renumbered 601–613; to British Columbia Railway 601–630. They were rebuilt into CRS20's^[1]
Quebec Iron and Titanium	1	6	Renumbered 16
Roberval and Saguenay Railway	2	24, 25
Wabush Lake Railway / Arnaud Railway	11	901–911
Totals	351

Preserved

West Chester Railroad #1803 is an ALCO RS-18 built in 1960 by the MLW for the Canadian Pacific Railway and was numbered 8762. In 1998, it was retired from service by the Canadian Pacific Railroad and was bought by the West Chester Railroad that same year, where it currently remains in service. It was re-numbered as 1803 and repainted into a Brunswick green with a yellow frame stripe.