EMD SDP40
| EMD SDP40 | |
|---|---|
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| Kansas City Southern Railway 3057 | |
| Power type | Diesel-electric |
| Builder | General Motors Electro-Motive Division (EMD) |
| Model | SDP40 |
| Build date | June 1966 – May 1970 |
| Total produced | 20 |
| AAR wheel arr. | C-C |
| UIC classification | Co'Co' |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Trucks | Flexicoil C2L |
| Wheel diameter | 40 in (1,000 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) |
| Locomotive weight | 370,000 lb (170,000 kg) |
| Fuel type | diesel |
| Fuel capacity | 1,800 USgal (6,800 l; 1,500 imp gal) |
| Lubricant capacity | 243 USgal (920 l; 202 imp gal) |
| Coolant capacity | 295 USgal (1,120 l; 246 imp gal) |
| Water capacity | 2,200 USgal (8,300 l; 1,800 imp gal) |
| Sandbox capacity | 56 cu ft (1.6 m3) |
| Fuel consumption | 167 USgal (630 l; 139 imp gal) per hour |
| Water consumption | 45 USgal (170 l; 37 imp gal) per hour |
| Prime mover | EMD 16-645-E3 |
| Engine RPM range | 315-900 |
| Engine type | Two-stroke diesel |
| Aspiration | Mechanically-assisted turbocharger |
| Displacement | 10,320 cu in (169,100 cm3) |
| Alternator | AR-10 |
| Traction motors | D-77 |
| Cylinders | V16 engine |
| Transmission | electric |
| Top speed | 83 mph (134 km/h) |
| Power output | 3,000 hp (2,240 kW) |
| Train heating | Steam generator |
| Locomotive brakes | Independent air; optional: dynamic brakes |
| Train brakes | Air, schedule 26-L |
| Locale | North America |
An EMD SDP40 is a 6-axle passenger diesel locomotive built by General Motors Electro-Motive Division between June 1966 and May 1970. Although few were produced, they enjoyed long service lives.
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[edit] Design
Like its predecessor in EMD's catalog, the SDP35, the SDP40 is essentially a high-horsepower freight locomotive with additional equipment for passenger train service.
In 1966, EMD updated their locomotive catalog with entirely new models, all powered by the new 645 diesel. These included six-axle models SD38, SD40 and SD45, in addition to the SDP40. All shared standardized components, including the frame, cab, generator, trucks, traction motors, and air brakes. The primary difference was the power output: 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.
Besides horsepower, the primary characteristic of a passenger locomotive at the time was the ability to provide steam to the passenger cars, for heating, cooking, and sometimes cooling. Secondary characteristics could include a higher gear ratio for faster running, addition of the graduated-release feature to the air brakes, type F tight-lock couplers to keep equipment together in the event of a derailment, or extra signals and communication equipment. Of these, the steam generator was the largest, and had the greatest impact on the locomotive's appearance. To fit a steam generator to the freight-only SD40, the designers had to move all the machinery forward about two feet on the frame, add a compartment behind the radiators for the boiler, and divide the fuel tank into fuel and water sections.
[edit] Aesthetics
Earlier passenger diesels, like the EMD E8, ALCO PA, FM Erie-built and Baldwin Sharknose, were streamlined cab units designed for good looks and the appearance of speed. The SDP40 instead has the rugged appeal of a high-horsepower road-switcher. This look was contemporary to, and eventually overtaken by cowl units like the GE U30CG and EMD FP45, SDP40F and F40PH.
Visually, the SDP40 is a hood unit distinguished only by the shape of its rear end behind the radiators, with its flat end having no number boards, shuttered boiler air intake on each side, extra exhaust stacks over the boiler, cantilevered walkway around the flat end, and very steep rear steps. EMD applied this same end to the passenger SDP35, SDP45, and GP40P locomotives, as well as the freight DD35, DDA40X and SD40T-2.
Amtrak's SDP40F locomotive, although sharing several mechanical specifications, is visually a much different locomotive. Seven years separate their introductions, and the SDP40F was actually based on the SD40-2. It had a full-width carbody, similar to the FP45. It was also six feet longer than the SDP40.
[edit] Original Owners
Passenger locomotive purchases in Canada, the United States and Mexico during the 1960s were limited to 111 units. In most cases, the purchaser intended to save costs by replacing older, less powerful locomotives.
The Great Northern Railway purchased the first six SDP40s in 1966, to replace older F-units on the Western Star and smaller regional trains. Options included Vapor OK-4740 steam generators, water-transfer capability between units, 59:18 gearing for a top speed of 83 mph, and Type-F couplers. These were followed in 1967 by eight more powerful SDP45 locomotives ordered for the Empire Builder. After the startup of Amtrak in 1971, Great Northern Railway successor Burlington Northern Railroad converted all fourteen SDP passenger locomotives to freight service.
One SDP40, former Great Northern Railway 323, was temporarily renumbered 1976 and painted in red, white and blue for the United States Bicentennial in 1976.
NdeM's 14 were ordered in two groups: Ten in 1968 and four in 1970. In 1998, the government of Mexico privatized the NdeM, and the locomotives were split between two successor companies. Eight went to TFM, which was later purchased KCS and became KCSM. These eight have roamed freely in the United States. The other six went to Ferromex.
[edit] Roster
| Order | Built | Serial | Phase | 1st No. | 2nd No. | 3rd No. | 4th No. | 5th No. | 6th No. | 7th No. | Disposition |
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Scrapped MK Rail July 1996 | ||||
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Rebuilt, Active | |||
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Wrecked June 1984, scrapped | ||||
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Rebuilt, Active |
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Stored Dead - Reporting mark changed from BNSF to GN to make way for new deliveries | ||
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Wrecked August 1979 and rebuilt. Retired June 2008, donated to the Minnesota Transportation Museum May 2009. | |
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Scrapped December 2008 by Progress Rail in Mayfield, KY | |||
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Was once derelict - rebuilt into FNM 13099, FXE 3212, or FXE 3227? | |||||
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Scrapped December 2008 by Progress Rail in Mayfield, KY | |||
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Scrapped December 2008 by Progress Rail in Mayfield, KY | |||
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Rebuilt to SD22ECO August 2009 | |||
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Rebuilt to SD22ECO August 2009 | |||
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- Phases refer to SD40s in general.
[edit] Wrecks
On August 23, 1979 BN 6399 was the lead unit of train 23 when it ran head-on into train 182 at Maiden Rock, WI. 6399 was repaired and returned to service, as were the four units of the other train. The three trailing GP40 units were destroyed.
[edit] Rebuilds
- FNM 13099 was rebuilt by the San Luis Potosi shops, but the original locomotive number is unknown. The steam generator air intake was plated over during the rebuild.
- FXE 3212 was rebuilt from an SDP40, but the original locomotive number is unknown. This rebuild resulted in removal of most of the steam generator compartment and installation of rear switching steps.
- FXE 3227 appears to have been rebuilt from an SDP40, but the original locomotive number is unknown. The steam generator air intake was plated over during the rebuild, but it retained the full compartment and vertical rear steps.
- MRL 290 was wrecked in 1988, and subsequently sold to MRL. It is listed in rosters and lettered as an SDP40-2XR. Its steam generator air intake was plated over during the rebuild, but it retained the full compartment and vertical rear steps.
- GCFX 3093 sources suggest was remanufactured by Alstom to SD40-2 specifications. Much of the steam generator compartment was removed to permit installation of compliant rear switching steps.
- KCS 1319 was rebuilt by EMD in London, ON during August 2009 into an SD22ECO, keeping its external appearance.
- KCS 1320 was rebuilt by EMD in London, ON during August 2009 into an SD22ECO, keeping its external appearance.
A consideration when rebuilding an SDP40 is that the rear corner steps do not comply with current Federal Regulations. The bottom step must be further out than the upper steps to provide a place to stand. Since the steam generator compartment extends to the end of the frame, it must be removed to install compliant switching steps. FXE 3212 and GCFX 3093 are examples. See:
- 49 CFR 231.29 Road locomotives with corner stairways
- 49 CFR 231.30 Locomotives used in switching service
The KCS pair rebuilt into SD22ECOs took a different approach: The bottom steps of the rear ladders were moved out to meet the requirement.
[edit] Preservation
BNSF donated 6327 - former Great Northern 325 and their last SDP40 in service - to the Minnesota Transportation Museum in May 2009.
[edit] References
- Moran, Miles (1975). "And Passenger Service Too". Railroad Modeler 5 (8): 40–47.
- Pinkepank, Jerry A. (1973). The Second Diesel Spotter’s Guide. Milwaukee, WI: Kalmbach Publishing Company. ISBN 0-89024-026-4.
- Shine, Joseph W. (1992). Great Northern Color Pictorial - Volume 2: Division Assignment, Second Generation Diesels, The Big Sky Blue Era. La Mirada, CA: Four Ways West Publications. ISBN 0961687479
- Strauss, John F. Jr. (1998). Great Northern Color Pictorial - Volume 5: Rocky's Robe of Many Colors. La Mirada, CA: Four Ways West Publications. ISBN 1885614225
- Sarberenyi, Robert. EMD SD40, SD40A, and SDP40 Original Owners. Retrieved on August 27, 2006
- The UNofficial EMD Homepage. Retrieved on May 1, 2009
- EMD's SD40, SD40A, and SDP40 - Original Owners. Retrieved on May 5, 2009
- Great Northern Empire - GN EMP SDP40 Roster. Retrieved on May 5, 2009
- KCS NAFTA Rosters. Retrieved on May 5, 2009
- Service Department (1966). SD40 - SDP40 Operator's Manual. La Grange, IL: Electro-Motive Division of General Motors Corporation
- Progress Rail KCS loco scrapping observed. Retrieved on June 13, 2009
- SD22ECO rebuilds 1319 and 1320 observed. Retrieved on August 27, 2009
- "BN Developments: 1977-80". Burlington Northern 1977-80 Annual (P.O. Box 17111, Denver, Colorado 80217: Motive Power Services) 7: 100. 1981.
- Erickson, Ron (June 2010). "Great Northern Automatic Heater Cars 1965-1968". The Great Northern Goat (Great Northern Railway Historical Society) 143 (Reference Sheet 360).
- EMD SD 6 WHEEL TRUCKS-DATA. Retrieved on July 25, 2010
[edit] See also
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