ALCO RSD-1

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ALCO RSD-1

Former US Army ALCO RSD-1, now owned by the Tennessee Valley Railroad Museum.
Power type	Diesel-electric
Model	RSD-1
Build date	November 1942 – May 1946
Total production	200
AAR wheel arr.	C-C
UIC classification	Co'Co'
Gauge	4 ft 8½ in (1,435 mm) 5 ft (1,524 mm) – Russia
Length	55 ft 5¾ in (16.91 m)
Width	10 ft 0 in (3.05 m)}
Height	14 ft 5 in (4.39 m)
Locomotive weight	247,500 pounds (112.3 t)
Fuel capacity	1,000 US gal (3,800 l/830 imp gal)
Prime mover	ALCO 539T
Engine type	Four-stroke diesel
Aspiration	Turbocharger
Displacement	9,572 cu in (156.86 l)
Cylinders	Straight-6
Cylinder size	12½ in × 13 in (318 mm × 330 mm)
Transmission	DC generator, DC traction motors
Top speed	65 mph (105 km/h)
Power output	1,000 hp (750 kW)
Tractive effort	40,425 lbf (179,820 N)
Locomotive brakes	Straight air
Train brakes	Air
Locale	North America, Soviet Union

Former Soviet Railways Д^а20-09 (D^a20-09) on exhibit at the railway museum in former Varshavsky terminal -- Saint Petersburg, Russia. Originally built by ALCO as a model RSD-1 in 1944 and exported to the USSR.

The ALCO RSD-1 was a diesel-electric locomotive built by American Locomotive Company (ALCO). This model was a road switcher type rated at 1000 horsepower and rode on three-axle trucks, having a C-C wheel arrangement. It was often used in much the same manner as its four-axle counterpart, the ALCO RS-1, though the six-motor design allowed better tractive effort at lower speeds, as well as a lower weight-per-axle.

There were three different specifications issued that covered the RSD-1 model; E1645 and E1646 were for wartime production for the US Army, while E1641 was a post-war order for the Mexican National Railways (Ferrocarriles Nacionales de México).

Seventy of the RSD-1s were shipped overseas to the Soviet Union during World War II, where they were classed as the Soviet Railways Д^а20 (D^a20) class, as part of the Allied war effort. These locomotives were also used in the Trans-Iranian Railway. Subsequently, the Soviets kept many of the RSD-1s after the war, adopting the design to form the basis of their own line of diesel locomotives.

[edit] Original owners

[edit] Specification E1645

[edit] Specification E1646

[edit] Specification E1641

Wikimedia Commons has media related to:

Diesel locomotive DA20

[edit] External links

• ALCo World: The Russian RSD-1 Copies

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