| ALCO RSD-1 | |
|---|---|
| Former US Army ALCO RSD-1, now owned by the Tennessee Valley Railroad Museum. Donated from the Eglin AFB railroad when that operation was abandoned. | |
| Power type | Diesel-electric |
| Model | RSD-1 |
| Build date | November 1942 – May 1946 |
| Total produced | 150 |
| AAR wheel arr. | C-C |
| UIC classification | Co'Co' |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) 5 ft (1,524 mm) – Russia |
| Length | 55 ft 5 3⁄4 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 |
The ALCO RSD-1 was a diesel-electric locomotive built by American Locomotive Company (ALCO). This model was a road switcher type rated at 1,000 horsepower (750 kW) 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 Да20 (Da20) class, as part of the Allied war effort. These locomotives were also used on the Trans-Iranian Railway. The Soviets subsequently kept many of the RSD-1s after the war, adopting the design to form the basis of their own line of diesel locomotives. A dozen RSD-1s were sunk en route to the Soviet Union when the ship they were on was torpedoed by a German U-boat.
The first 13 RS-1s were requisitioned by the US Army, returned to ALCO and rebuilt to RSD-1s #8000-8012 for use on the Trans Iranian Railroad. This effort was to supply the Soviet Union. See the RS-1 article for the identity of the first 13 RSD-1s.
Contents |
| Railroad | Quantity | Road Numbers | Notes |
|---|---|---|---|
| United States Army |
|
8013–8056 |
| Railroad | Quantity | Road Numbers | Notes |
|---|---|---|---|
| United States Army |
|
8600–8629 | to Soviet Railways Да20-1 to Да20-30 |
| United States Army |
|
8630–8640 | lost in U-Boat attack |
| United States Army |
|
8641–8648 | to Soviet Railways Да20-31 to Да20-38 |
| United States Army |
|
8649 | lost in U-Boat attack |
| United States Army |
|
8650-8679 | |
| United States Army |
|
8680–8699 | to Soviet Railways Да20-39 to Да20-58 |
| Railroad | Quantity | Road Numbers | Notes |
|---|---|---|---|
| Ferrocarriles Nacionales de México |
|
5700–5705 |
|
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