EMD GP40X
Encyclopedia
An EMD GP40X is a 4-axle diesel locomotive
built by General Motors Electro-Motive Division between 1977 and 1978. Power for this unit was provided by a turbocharged 16-cylinder
EMD 645F (derivative of the EMD 645
series engine) which could produce 3,500 horsepower
(2,600 kilowatts). 23 examples of this locomotive were built for North American railroads. This unit was a pre-production version meant to test technologies later incorporated into EMD's 50-series locomotives GP50
and SD50
. Ten GP40X were delivered with an experimental HT-B truck design that became an option (but never used) on the production GP50
.
The designation GP40X was also given to an experimental locomotive built on an EMD GP35
frame in May 1965. Only one example of this locomotive was ever produced, the EMD 433A, a 3000hp test prototype that was the first 4-axle locomotive to be powered by the new 645-series prime mover. The 433A served as the precursor to the EMD GP40
. The 433A was purchased by the Illinois Central Railroad
, and became the IC 3075. The 1965 EMD 433A has very little in common with the 1977 GP40X other than flared radiators and a 645-series prime mover.
Locomotive
A locomotive is a railway vehicle that provides the motive power for a train. The word originates from the Latin loco – "from a place", ablative of locus, "place" + Medieval Latin motivus, "causing motion", and is a shortened form of the term locomotive engine, first used in the early 19th...
built by General Motors Electro-Motive Division between 1977 and 1978. Power for this unit was provided by a turbocharged 16-cylinder
Cylinder (engine)
A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels. Multiple cylinders are commonly arranged side by side in a bank, or engine block, which is typically cast from aluminum or cast iron before receiving precision machine work...
EMD 645F (derivative of the EMD 645
EMD 645
The EMD 645 family of diesel engines was designed and manufactured by the Electro-Motive Division of General Motors. Intended primarily for locomotive, marine and stationary engine use, one 16-cylinder version powered the 33-19 "Titan" prototype haul truck designed by GM's Terex...
series engine) which could produce 3,500 horsepower
Horsepower
Horsepower is the name of several units of measurement of power. The most common definitions equal between 735.5 and 750 watts.Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation. The unit was widely adopted to measure the...
(2,600 kilowatts). 23 examples of this locomotive were built for North American railroads. This unit was a pre-production version meant to test technologies later incorporated into EMD's 50-series locomotives GP50
EMD GP50
* Sarberenyi, Robert. ...
and SD50
EMD SD50
The EMD SD50 was a diesel-electric locomotive built by General Motors Electro-Motive Division. It was introduced in May 1981 as part of EMD's "50 Series", but prototype SD50S locomotives were built from 1980; production ceased in January 1986...
. Ten GP40X were delivered with an experimental HT-B truck design that became an option (but never used) on the production GP50
EMD GP50
* Sarberenyi, Robert. ...
.
The designation GP40X was also given to an experimental locomotive built on an EMD GP35
EMD GP35
An EMD GP35 is a 4-axle diesel locomotive built by General Motors Electro-Motive Division between July 1963 and December 1965 and by General Motors Diesel between May 1964 and January 1966. Power was provided by an EMD 567D3A 16-cylinder engine which generated .Many railroads traded in Alco and...
frame in May 1965. Only one example of this locomotive was ever produced, the EMD 433A, a 3000hp test prototype that was the first 4-axle locomotive to be powered by the new 645-series prime mover. The 433A served as the precursor to the EMD GP40
EMD GP40
The EMD GP40 is a 4-axle diesel-electric road switcher locomotive built by General Motors Electro-Motive Division between November 1965 and December 1971...
. The 433A was purchased by the Illinois Central Railroad
Illinois Central Railroad
The Illinois Central Railroad , sometimes called the Main Line of Mid-America, is a railroad in the central United States, with its primary routes connecting Chicago, Illinois with New Orleans, Louisiana and Birmingham, Alabama. A line also connected Chicago with Sioux City, Iowa...
, and became the IC 3075. The 1965 EMD 433A has very little in common with the 1977 GP40X other than flared radiators and a 645-series prime mover.
Original owners
| EMD GP40X Locomotives | ||||
|---|---|---|---|---|
| Railroad | Quantity | Road numbers | Truck Type | Notes |
| Atchison, Topeka and Santa Fe Atchison, Topeka and Santa Fe Railway The Atchison, Topeka and Santa Fe Railway , often abbreviated as Santa Fe, was one of the larger railroads in the United States. The company was first chartered in February 1859... |
10 | 3800-3809 | Blomberg M | 3800 Locotrol Locotrol Locotrol is a product of GE Transportation Systems that permits railway locomotives to be distributed throughout the length of a train... Master 3801 Locotrol Receiver |
| Southern Pacific Railroad Southern Pacific Railroad The Southern Pacific Transportation Company , earlier Southern Pacific Railroad and Southern Pacific Company, and usually simply called the Southern Pacific or Espee, was an American railroad.... |
2 | 7200-7201 | HT-B | Locotrol Locotrol Locotrol is a product of GE Transportation Systems that permits railway locomotives to be distributed throughout the length of a train... Masters; Delivered with Elephant ears |
| Southern Pacific Railroad Southern Pacific Railroad The Southern Pacific Transportation Company , earlier Southern Pacific Railroad and Southern Pacific Company, and usually simply called the Southern Pacific or Espee, was an American railroad.... |
2 | 7230-7231 | HT-B | Locotrol Receivers; Delivered with Elephant ears |
| Southern Railway | 3 | SOU 7000-7002 | Blomberg M | Hi-nose |
| Union Pacific Railroad Union Pacific Railroad The Union Pacific Railroad , headquartered in Omaha, Nebraska, is the largest railroad network in the United States. James R. Young is president, CEO and Chairman.... |
6 | 9000-9005 | HT-B |
External links
- Sarberenyi, Robert. EMD GP40X Original Owners. Retrieved on August 27, 2006
- Thompson, J. David. EMD GP35 Original Owners, GP40 Prototype. Retrieved on August 27, 2006