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ALCO RSC-3 Diesel Locomotives
The ALCO RSC-3 was a diesel-electric locomotive of the road switcher type rated at 1,600 horsepower (1,200 kW), that rode on three-axle trucks, having an A1A-A1A wheel arrangement.

Used in much the same manner as its four-axle counterpart, the ALCO RS-3, though the axle load was spread out for operation on light rail such as are found on branch lines. This locomotive had much better success as an export unit than in the domestic market.

Original owners
Locomotives built by Alco

Algerian Railways
Quantity:  5
Road numbers:  DG1–DG5

FC Central Uruguayo
Quantity:  3
Road numbers:  1601–1603
Notes:  1,435 mm (4 ft 8 1⁄2 in) gauge (last one withdrawn in 1993).

North Western Railway of Pakistan
Quantity:  26
Road numbers:  3301–3326
Notes:  to Pakistan Railways 1,676 mm (5 ft 6 in) gauge.

Panama Railroad
Quantity:  3
Road numbers:  901–903
Notes:  5 ft (1,524 mm) gauge.

São Paulo Railway, Brazil
Quantity:  12
Road numbers:  550–561
Notes:  1,600 mm (5 ft 3 in) gauge.

Caminhos de Ferro Portugueses
Quantity:  5
Road numbers:  1521–1525
Notes:  1,668 mm (5 ft 5 21⁄32 in) gauge.

Consolidated Railways of Cuba
Quantity:  6
Road numbers:  1606-1611

Seaboard Air Line Railroad
Quantity:  7
Road numbers:  1537–1543
Notes:  to Seaboard Coast Line 1111–1117.

Soo Line Railroad
Quantity:  4
Road numbers:  372–374, 2380
Notes:  2380 owned by Wisconsin Central Railway.

Total Quantity:  71

Locomotives built by Montreal Locomotive Works

New South Wales Government Railways
Quantity:  20
Road numbers:  4001–4020
Notes:  NSW 40 class

Pacific Great Eastern Railway
Quantity:  8
Road numbers:  561–568
Notes:  to British Columbia Railway

Total Quantity:  28

Preserved

Australia
4001 Preserved at the NSWRTM Thirlmere
4002 Preserved at the PRHS Western Australia
4006 On static display Wickham WA

Brazil
7653 operating in Supervia

Canada
PGE 561 operating in Squamish at the West Coast Railway Heritage Park.

ALCO RSC-3 Overview
Type and origin
Power type: Diesel-electric
Builders: ALCO, MLW
Model: RSC-3
Build date: November 1950 – June 1955
Total produced: 99
Specifications
Configuration:
​ • AAR A1A-A1A
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge and others
Length: 53 ft 1 in (16.18 m)
Width: 10 ft (3.05 m)
Height: 14 ft 5 in (4.39 m)
Locomotive weight: 254,840 lb (115,590 kg)
Fuel capacity: 800 US gal (666 imp gal; 3,028 L)
Prime mover ALCO 244
Engine type: V12 Four-stroke diesel
Aspiration: Turbocharged
Displacement: 8,016 cu in (131.36 l)
Generator: DC generator
Traction motors: DC traction motors
Cylinders: 12
Cylinder size: 9 in × 10 1⁄2 in (229 mm × 267 mm)
Transmission: Electric
Locomotive brake: Straight air
Train brakes: Air
Performance figures
Maximum speed: 65 mph (105 km/h)
Power output: 1,600 hp (1,190 kW)
Tractive effort: 42,470 lbf (188.92 kN)
Career
Locale: North America, Central America, South America, Portugal, Australia, Pakistan

See also:

Alco Diesel-Electric Locomotives

Diesel-Electric Locomotives

American Locomotive Company

Locomotives

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New South Wales Government Railways 4002 passes through Hawkesbury River station.
By Commissioner Geoff - Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=4869491

New South Wales Government Railways 4002 passes through Hawkesbury River station.