EMD SD40T-2
Performance figures | |
---|---|
Power output | 3,000 hp (2,240 kW) |
Tractive effort | 92,000 lbf (410 kN) (starting) 82,000 lbf (360 kN) (continuous) |
Career | |
---|---|
Operators | Southern Pacific (and Cotton Belt), Rio Grande, Union Pacific |
Nicknames | "tunnel motors" |
Locale | United States |
Disposition | most still in service as of 2010 |
The SD40T-2 is a model of diesel-electric locomotive built by General Motors Electro-Motive Division in the United States. The SD40T-2 is equipped with a 16-cylinder EMD 645E3 diesel engine producing 3,000 horsepower (2,240 kW). 312 SD40T-2s were built for three railroads in the United States between April 1974 and July 1980. This locomotive and the SD45T-2 are popularly called tunnel motors, but EMD's term is SD40-2 with "cooling system modifications" because they were designed for better engine cooling in mountainous areas.[1] The difference between this locomotive and its non-tunnel motor cousin, the SD40-2, are the radiator air intakes are located lower down at the rear of the locomotive.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/50/EMD_SD45T-2_vs_SD40T-2_radiator_fan_motor_access_doors.jpg/220px-EMD_SD45T-2_vs_SD40T-2_radiator_fan_motor_access_doors.jpg)
This locomotive model was purchased by the Denver and Rio Grande Western Railroad, the Southern Pacific Railroad, and its subsidiary Cotton Belt. Southern Pacific's version has a 4,400-US-gallon (16,700 L; 3,660 imp gal) fuel tank and is 70 feet 8 inches (21.54 m) long. Rio Grande's version has a smaller 4,000-US-gallon (15,100 L; 3,330 imp gal) fuel tank.
Original purchasers
Railroad | Quantity | Road numbers | Notes |
---|---|---|---|
Denver and Rio Grande Western Railroad | 73 | 5341-5413 | All with 81 in. or 88 in. short noses. |
St. Louis Southwestern Railway (Cotton Belt) | 10 | 8322-8326, 8372-8376 | "snoot noses" |
Southern Pacific Railroad | 229 | 8230-8299, 8300-8321, 8327-8341 8350-8371, 8377-8391, 8489-8573 | 8300 series featured extended "snoot" noses for radio control equipment. 8278 was damaged beyond repair in the 1989 Cajon Pass runaway and sold for parts, then scrapped. |
Totals | 312 |
Preservation
- Denver and Rio Grande Western #5371 is preserved at the Utah State Railroad Museum in Ogden, Utah.[2]
- Denver and Rio Grande Western #5401 is preserved at the Colorado Railroad Museum in Golden, Colorado.[3]
- From 2010 to 2019, Union Pacific #2921 (formerly Southern Pacific #8385) was preserved at the Boone and Scenic Valley Railroad in Boone, Iowa.[4] In 2020, the locomotive was traded to Midwest Locomotive Leasing (MWLX) for general service.
Comparison between an EMD SD40T-2 (left) and SD40-2 (right)
References
- ^ Guss, Chris (January 1, 2018). "Tunnel (motors) from the past | Trains Magazine". TrainsMag.com. Retrieved 2019-02-13.
- ^ "Ogden Union Station Equipment". utahrails.net. Retrieved 2024-03-09.
- ^ "Colorado Railroad Museum to cosmetically restore Rio Grande tunnel motor | Trains Magazine". Trains. 2018-08-30. Retrieved 2024-03-09.
- ^ "BSV Roster". jdhsmith.math.iastate.edu. Retrieved 2024-03-09.
External links
Media related to EMD SD40T-2 locomotives at Wikimedia Commons
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