Great Northern W-1 Electric Locomotive
The W-1 was a class of electric locomotive built by the Great Northern Railway. They were constructed to haul trains on the 73-mile (117 km) electrified portion of the railroad across the Cascade Mountains from Wenatchee, Washington to Skykomish, Washington, including the Cascade Tunnel. Only two locomotives were built, and they had an AAR B-D+D-B wheel arrangements.

The locomotives were built at General Electric's Erie works in 1947, and were numbered 5018 and 5019. They were powered by a 5,000 horsepower (3.7 MW) W-1 motor-generator, and at that time were the largest single-unit electric locomotives used in North America.

Both locomotives were retired in 1956 when the electrification system was switched off and diesel locomotives started operating. Unit 5019 was scrapped in 1959. Unit 5018 was sold to the Union Pacific, who used its body and running gear as part of an unsuccessful experimental coal burning gas turbine-electric locomotive No. 80.

Great Northern W-1 Overview
Type and origin
Power type: Electric
Builder: GE Erie Works
Serial number: 28448, 28449
Build date: 1947
Total produced: 2
Specifications
Configuration:
​ • Whyte 4-8-8-4
 • AAR B-D+D-B
 • UIC (Bo′Do′)(Do′Bo′)
Gauge: 4 ft 8 1⁄2 in (1,435 mm)
Wheel diameter: 42 in (1.1 m)
Minimum curve: 17 degrees (locomotive only)
Minimum curve: 10 degrees (with train)
Length: 101 ft (31 m)
Height: 15 ft 6 in (4.72 m)
Adhesive weigh:t 720,000 lb (330 t)
Locomotive weight: 720,000 lb (330 t)
Electric system/s 11 kV, 25 Hz AC
Current pickup: Pantograph
Traction motors: 12 GE 746 of 420 hp (310 kW)
Transmission: AC Synchronous motors (2×),
DC Generators: (4×)
DC traction motors: (12×)
Train heating: None
Locomotive brake: Air/Regenerative
Train brakes: Air
Performance figures
Maximum speed: 65 mph (105 km/h)
Power output: 5,000 hp (3,700 kW)
Tractive effort: 119,000 lbf (530 kN)
Career
Operator: Great Northern Railway
Class: W-1
Number in class: 2
Road Numbers: 5018, 5019
Delivered: 1947
Retired: 1956
Scrapped: 1968, 1959
Disposition: 5018 sold to Union Pacific, 1960; 5019 Scrapped 1959.

See also:

Great Northern Railway

Electric Locomotives

Locomotives

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Great Northern GE W1 Locomotive No. 5019 at Skyhomish.

Great Northern GE W1 Locomotive No. 5019 at Skyhomish.

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