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OSR #505 in 2009.
Type and origin
Power type Diesel-electric
Builder Montreal Locomotive Works
Model RS-23
Build date August 1959 to September 1960
Total produced 57
AAR wheel arr. B-B
UIC classification Bo'Bo'
Gauge 4 ft 8 12 in (1,435 mm)
Prime mover ALCO 251D
Engine RPM range 1025 / 325
Engine type Four-stroke diesel
Generator DC generator
Traction motors 4 x GE 752 DC traction motors
Transmission Electric
Performance figures
Power output 1,000 hp (750 kW)
Locomotive brake Air, optional dynamic
Train brakes Air
Locale Canada and United States

The MLW RS-23 was a 1,000 hp (746 kW) diesel-electric locomotive built by Montreal Locomotive Works between August 1959 and September 1960. Production totaled 40 locomotives.

The largest fleet of these locomotives was operated by Canadian Pacific Railway, which classed them DRS-10c in that company's locomotive classification system.

Original owners[edit]

Railway Quantity Road number Notes
Canadian Pacific Railway 34 8013–8046
Sydney and Louisburg Railway 3 200–202
Texas Gulf Sulphur Company 3 3457-01 - 3457-03
Totals 40

See also[edit]