Great Northern Y-1

The Great Northern Railway's class Y-1 comprised eight electric locomotives with AAR 1-C+C-1 wheel arrangements. The locomotives were used on the 73-mile (117 km) electrified portion of the railroad, from Wenatchee, Washington to Skykomish, Washington, including the Cascade Tunnel.

Great Northern Railway Y-1 Pennsylvania Railroad FF2
A GN Y-1 locomotive in 1927
Type and origin Power type Electric Builder Alco–General Electric Model GE: 1-C+C-1-410/518-E6GE290A-11000V Build date 1927 (2), 1928 (2), 1930 (4) Total produced 8
Specifications Configuration: ​  • AAR 1-C+C-1  • UIC (1′Co)+(Co1′)  • Commonwealth 1Co+Co1 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Adhesive weight c. 410,000 lb (186,000 kg; 186.0 t) Loco weight 5010–5011: 518,250 lb (235,100 kg; 235.1 t) 5012–5017: 527,200 lb (239,100 kg; 239.1 t) Electric system/s 11 kV AC, 25 Hz overhead Current pickup(s) Pantograph Transmission Motor–generator supplied direct current fed to 6 traction motors.
Performance figures Power output 3,000 hp (2.24 MW) (continuous) 3,300 hp (2.46 MW) (one hour)
Career Operators Great Northern Railway Pennsylvania Railroad Class GN: Y-1 PRR FF2 Numbers GN: 5010–5017 PRR: 1–7 Last run GN: 1956 PRR: 1966 Scrapped 1957 (1), 1960 (1), 1962 (1), 1966 (5) Disposition All scrapped

The 3,000 horsepower (2.2 MW) locomotives were built at Schenectady, New York, with car bodies manufactured by American Locomotive Company and electrical components supplied by General Electric. They used motor-generator sets to rectify the alternating current line voltage into direct current for their traction motors.

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 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.