EMD SD45X
Encyclopedia
An EMD SD45X is a 6-axle experimental diesel locomotive
built by General Motors Electro-Motive Division between June 1970 and February 1971. Power was provided by an EMD 645E3A
20-cylinder
engine which generated 4200 hp. 7 examples of this locomotive model were built for American
railroads. 6 of these units would end up in service with Southern Pacific Railroad
. One was rebuilt in 1980 by Morrison-Knudsen into an SD45Xm with a long hood from a scrapped DD35
.
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 June 1970 and February 1971. Power was provided by an EMD 645E3A
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...
20-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...
engine which generated 4200 hp. 7 examples of this locomotive model were built for American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
railroads. 6 of these units would end up in service with 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....
. One was rebuilt in 1980 by Morrison-Knudsen into an SD45Xm with a long hood from a scrapped DD35
EMD DD35
The EMD DD35 was a diesel-electric locomotive of D-D wheel arrangement built by General Motors Electro-Motive Division for the Union Pacific Railroad and Southern Pacific Railroad. In the early 1960s Union Pacific started asking for a 15,000 hp 3-unit locomotive set to replace the turbines...
.
| Qty. | Railroad | Road Numbers | Date | Builders #s | Notes |
|---|---|---|---|---|---|
| 1 | EMD | 4201 | 6/70 | 36806 | EMD demo, to SP 9503, 12/72 |
| 2 | EMD | 4202, 4203 | 2/71 | 36807, 36808 | EMD demo, to SP 9504-9505, 12/72 |
| 1 | EMD | 5740 | 6/70 | 34123 | |
| 1 | Southern Pacific | 9500 | 8/70 | 35741 | |
| 2 | Southern Pacific | 9501, 9502 | 9/70 | 35742, 35743 | |