EMD SDP40
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| Type and origin | |
|---|---|
| Power type | Diesel-electric |
| Builder | General Motors Electro-Motive Division (EMD) |
| Model | SDP40 |
| Build date | June 1966 – May 1970 |
| Total produced | 20 |
| Specifications | |
|---|---|
| Configuration: |
|
| • AAR | C-C |
| • UIC | Co'Co' |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) standard gauge |
| Trucks | Flexicoil C2L |
| Wheel diameter | 40 in (1,016 mm) |
| Minimum curve | 274 ft (84 m) |
| Length | 65 ft 8 in (20.02 m) over the coupler pulling faces |
| Width | 10 ft 0 in (3.05 m) |
| Height | 15 ft 5 1⁄4 in (4.705 m) |
| Loco weight | 370,000 lb (170,000 kg) |
| Fuel type | diesel |
| Fuel capacity | 1,800 US gal (6,800 l; 1,500 imp gal) |
| Lubricant cap. | 243 US gal (920 l; 202 imp gal) |
| Coolant cap. | 295 US gal (1,120 l; 246 imp gal) |
| Water cap | 2,200 US gal (8,300 l; 1,800 imp gal) |
| Sandbox cap. | 56 cu ft (1.6 m3) |
| Fuel consumption | 167 US gal (630 l; 139 imp gal) per hour |
| Water consumption | 45 US gal (170 l; 37 imp gal) per hour |
| Prime mover | EMD 16-645-E3 |
| RPM range | 315-900 |
| Engine type | V16 Two-stroke diesel |
| Aspiration | Mechanically-assisted turbocharger |
| Displacement | 10,320 cu in (169,100 cm3) |
| Alternator | AR-10 |
| Traction motors | D-77 |
| Cylinders | 16 |
| Transmission | Diesel-electric transmission |
| Train heating | Steam generator |
| Loco brake | Independent air; optional: dynamic brakes |
| Train brakes | Air, schedule 26-L |
| Performance figures | |
|---|---|
| Maximum speed | 83 mph (134 km/h) |
| Power output | 3,000 hp (2,240 kW) |
| Career | |
|---|---|
| Locale | North America |
An SDP40 is a 6-axle passenger diesel-electric locomotive built by General Motors Electro-Motive Division (EMD) between June 1966 and May 1970.
Like its predecessor in EMD's catalog, the SDP35, the SDP40 is a high-horsepower freight locomotive with equipment for passenger train service.
In 1966, EMD replaced all their production units with those powered by the new 645 diesel. They included six-axle models SD38, SD40 and SD45, in addition to SDP40. All had standard components including the frame, cab, generator, trucks, traction motors, and air brakes. The main difference was the power: SD38 = 2,000 hp (1,490 kW) from a non-turbocharged V16, SD40 = 3,000 hp (2,240 kW) from a turbocharged V16, and SD45 = 3,600 hp (2,680 kW) from a turbocharged V20.
The SD40 and SDP40 were so similar that EMD published common operator's and service manuals to cover both.
At the time most passenger locomotives needed to provide steam to the passenger cars for heating, cooking, and sometimes cooling. They needed a higher gear ratio for faster running, the graduated-release feature on the air brakes, and type F tight-lock couplers to keep equipment together in the event of a derailment. To fit a steam generator to the freight-only SD40, the designers had to move the machinery forward about 2 feet (0.61 m) on the frame, add a compartment behind the radiators for the boiler, and divide the fuel tank into fuel and water sections.
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Wikipedia