The EMD SW9 is a model of diesel

switcher A switcher, shunter, yard pilot, switch engine, yard goat, or shifter is a small railroad locomotive used for manoeuvring railroad cars inside a rail yard in a process known as ''switching'' (US) or ''shunting'' (UK). Switchers are not inte ...

locomotives A locomotive or engine is a rail transport vehicle that provides the motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, motor coach, railcar or power car; th ...

built by General Motors Electro-Motive Division between November 1950 and December 1953. Additional SW9s were built by General Motors Diesel in Ontario Canada from December 1950 to March 1953. Power was provided by an

EMD 567B EMD may refer to: Finance and commerce * Emerging market debt * Earnest money deposit, in the United States, a security deposit, especially for real estate Medicine * Electromagnetic diaphragm * Electromechanical dissociation * Emergency me ...

12-cylinder A V12 engine is a twelve-cylinder piston engine where two banks of six cylinders are arranged in a V configuration around a common crankshaft. V12 engines are more common than V10 engines. However, they are less common than V8 engines. The fir ...

engine, producing . 786 examples of this model were built for American railroads and 29 were built for Canadian railroads.

Design and production

The SW9 was EMD's successor to the SW7. Like the SW7, the SW9 retained a power output of 1,200 hp and the same general design. It differed in lacking the upper hood vents found in the SW7, and with the installation of a 567B engine to replace the 567A found in the SW7. Starting in October 1953 a number of SW9s were built with the 567BC engine. In December 1953, one locomotive, Weyerhaeuser 305, was built with a 567C engine. The 567C was subsequently installed on the SW9's successor, the

SW1200 An EMD SW1200 is a 4 axle diesel switcher locomotive built by General Motors Electro-Motive Division between January 1954 and May 1966. Power is provided by an EMD 567C 12-cylinder engine which generates . Additional SW1200 production was complet ...

. In addition to the single units produced, ten TR5 cow-calf paired sets were produced (eight for the

Union Pacific Railroad The Union Pacific Railroad , legally Union Pacific Railroad Company and often called simply Union Pacific, is a freight-hauling railroad that operates 8,300 locomotives over routes in 23 U.S. states west of Chicago and New Orleans. Union Pac ...

, and two for the Union Railroad of Pittsburgh). The Union Railroad also bought an additional two TR5B "calves".

Original buyers

SW9 locomotives built by Electro-Motive Division, USA

SW9 locomotives built by General Motors Diesel, Canada

TR5 locomotives built by Electro-Motive Division, USA

SW1000R

In 1994

Amtrak The National Railroad Passenger Corporation, doing business as Amtrak () , is the national passenger railroad company of the United States. It operates inter-city rail service in 46 of the 48 contiguous U.S. States and nine cities in Canada ...

acquired nine SW9s from various railroads and had them rebuilt by the National Railway Equipment Company. These switchers were reclassified as EMD SW1000R.

References

External links

* {{Diesel_Switchers SW0009 SW0009 B-B locomotives Railway locomotives introduced in 1950 Diesel-electric locomotives of the United States Locomotives with cabless variants Standard gauge locomotives of the United States Standard gauge locomotives of Canada Diesel-electric locomotives of Canada Shunting locomotives