ALCO MRS-1

ALCO MRS-1
US Army No. 2085, on the Bay Coast Railroad
Type and origin
Power typeDiesel-electric
BuilderALCO
Serial number80324-80406
ModelRSX-4, Specification E-1670
Build date1953-1954
Total produced83
Specifications
Configuration:
​
 • AARC-C
Gaugemultigauge, between 4 ft 8+1⁄2 in (1,435 mm) and 5 ft 6 in (1,676 mm) broad gauge
Length55 ft 11 in (17.04 m)
Loco weight240,000 lb (110,000 kg)
Prime moverALCO 12-244D
Engine typeFour-stroke diesel
Displacement8,016 cu in (131.36 L)
GeneratorDC generator
Traction motorsDC traction motors
CylindersV12
Cylinder size9 by 10+1⁄2 inches (229 mm × 267 mm)
TransmissionElectric
Loco brakeStraight air, Dynamic
Train brakesAir
Performance figures
Maximum speed70 mph (110 km/h)
Power output1,600 hp (1,200 kW)
Tractive effort30,700 lbf (137,000 N) at 11 mph (18 km/h) (continuous)

The ALCO MRS-1 is a type of diesel-electric locomotive built by the American Locomotive Company for the United States Army Transportation Corps. They were built with multigauge trucks and to a reduced loading gauge for service anywhere in the world in the event of war.

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