GN W-1

Great Northern W-1

Type and origin
Power type	Electric
Builder	GE Erie Works
Serial number	28448, 28449
Build date	1947
Total produced	2

Specifications
Configuration	4-8-8-4
AAR wheel arr.	B-D+D-B
UIC class	(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) 10 degrees (with train)
Length	101 ft (31 m)
Height	15 ft 6 in (4.72 m)
Adhesive weight	720,000 lb (330 t)
Loco weight	720,000 lb (330 t)
Electric system(s)	11 kV, 25 Hz AC
Current collection	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
Loco 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
Operators	Great Northern Railway
Class	W-1
Number in class	2
Numbers	5018, 5019
Delivered	1947
Retired	1956
Scrapped	1968, 1959
Disposition	5018 sold to Union Pacific, 1960 5019 Scrapped 1959

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 #80.

References

"Train Shed Cyclopedia". Train Shed Cyclopedia. Newton K. Gregg (66). 1978. ISBN 0-912318-99-6.
Ringnalda, Ben (2005). "Great Northern Empire - Then and Now". www.GreatNorthernEmpire.net. Retrieved 2009-03-29.
Ross, Don. "Don's Rail Photos - Great Northern Ry.". donsdepot.donrossgroup.net.
"GN W-1 Operators Manual GEJ-1185". Retrieved 2009-03-29.

Electric locomotives built by GE

DC Electrics (Bipolar motors)	NYC S-Motor NYC T-Motor MILW EP-2 “Bi-polar”

DC Electrics	CN Boxcab Electric MILW EF-1 / EP-1 MILW ES-1 MILW ES-2 GE 289A Boxcab Mexican Railway Boxcabs NYC P Motor NYC R-Motor NYC Q-Motor CUT P1-a NYC R-2 Paulista Rwy. 2-C+C-2 “Little Joe” CN Centercab Electric NJ E-10

AC Electrics	New Haven EP3 PRR P5a PRR GG1 New Haven EP4 New Haven EF3a PRR E2b

AC Electrics (3 phase)	GN boxcab

AC Electrics (motor generator)	New Haven EF2 New Haven EY3 GN Y-1 / PRR FF2 GN W-1 VGN EL-2B

AC Electrics (Ignitron Rectifier)	New Haven EP5 VGN EL-C (PC E33) PRR E44

AC Electrics (Silicon Rectifier)	E50C E60C E60CH / E60CP E25B E60C-2

(see also: List of GE locomotives)

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