The Great Northern Railway's class Y-1 comprised eight

electric locomotive An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor. Locomotives with on-board fuelled prime movers, such as diesel engines or g ...

s with AAR 1-C+C-1 wheel arrangements. The locomotives were used on the electrified portion of the railroad, from

Wenatchee, Washington Wenatchee ( ) is the county seat and largest city of Chelan County, Washington, United States. The population within the city limits in 2010 was 31,925, and was estimated to have increased to 34,360 as of 2019. Located in the north-central part ...

Skykomish, Washington Skykomish is a town in King County, Washington, United States. The population was 198 as of the 2010 census, down from an estimated peak of "several thousand" in the 1920s. Located in the Mount Baker-Snoqualmie National Forest, 49 miles east o ...

, including the

Cascade Tunnel The Cascade Tunnel refers to two railroad tunnels (original and its replacement) in the northwest United States, east of the Seattle metropolitan area in the Cascade Range of Washington, at Stevens Pass. It is approximately east of Everett, wit ...

. The locomotives were built at

Schenectady, New York Schenectady () is a city in Schenectady County, New York, United States, of which it is the county seat. As of the 2020 census, the city's population of 67,047 made it the state's ninth-largest city by population. The city is in eastern New Y ...

, with car bodies manufactured by American Locomotive Company and electrical components supplied by

General Electric General Electric Company (GE) is an American multinational conglomerate founded in 1892, and incorporated in New York state and headquartered in Boston. The company operated in sectors including healthcare, aviation, power, renewable en ...

. They used motor-generator sets to rectify the

alternating current Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in whic ...

line voltage into

direct current Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or eve ...

for their

traction motor A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, elevators or electric multiple unit. Traction motors are used in electrically powered rail vehicles ( electric multiple ...

s. The GN numbered the units 5010–5017 and classified them Y-1. After being involved in a wreck at Tonga, Washington in July 1945, the 5011 was rebuilt with a streamlined appearance and

EMD F-unit EMD F-units are a line of diesel-electric locomotives produced between November 1939 and November 1960 by General Motors Electro-Motive Division and General Motors-Diesel Division. Final assembly for all F-units was at the GM-EMD plant at La Gra ...

cabs; the GN reclassified it as Y-1a. In 1956, the GN dieselized operations through the Cascade Tunnel. The electrical system was decommissioned, and the Y-1 locomotives were sold to the Pennsylvania Railroad, who classified them as FF2. GN 5011 was broken up for spares, and the remaining seven locomotives were overhauled and converted to PRR standards and then placed into service, being assigned numbers 1–7 on the PRR. They lasted a few more years on the PRR, and were all scrapped between 1957 and 1966.

Fleet roster

References

* * (Simple drawing and specifications, for general reference by railroad staff). * pages 248–253 {{PRR locomotives 1-C+C-1 locomotives (1′Co)+(Co1′) locomotives 11 kV AC locomotives General Electric locomotives Y-1 Electric locomotives of the United States Scrapped locomotives Standard gauge locomotives of the United States Railway locomotives introduced in 1927 Mixed traffic locomotives