EMD GM6C
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| Power type | Electric |
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| Service class | Locomotive |
| Type of service | Freight |
| Builder | General Motors Electro-Motive Division (GM-EMD) |
| Serial number | 75605-1 |
| Model | GM6C |
| Build date | May 1, 1975 |
| Total production | 1 |
| AAR wheel arr. | C-C |
| UIC classification | Co'Co' |
| Gauge | 1,435 mm (4 ft 8½ in) |
| Trucks (Bogies) | EMD HTC |
| Wheel diameter | 42 in (1,100 mm) |
| Length | 68 ft 10 in (20.98 m) |
| Width | 10 ft (3.05 m) |
| Height | 14 ft 9.5 in (4.51 m) (over locked-down pantographs) |
| Total weight | 365,000 lb (166,000 kg) |
| Electric system(s) | switchable; 11kV 25Hz, 25kV 50Hz, 50kV 25Hz |
| Current Collection method(s) | Pantograph |
| Generator | EMD D79MA75 |
| Traction motors | 6 × EMD E88X |
| Power output | 6,000 hp (4,500 kW) |
| Tractive effort | 126,000 lbf (560 kN) starting 44,000 lbf (200 kN) continuous @ 46 mph |
| Locomotive brakes | Straight air |
| Train brakes | 26-L air |
| Career | EMD (EMDX) |
| Number(s) | 1975 (later 4975) |
| Locale | Penn Central (later Amtrak and Conrail) electrified lines |
| Disposition | scrapped |
| WikiProject Trains {{Infobox Locomotive Auto}} |
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The GM6C was a solitary testbed electric locomotive for freight duties built by General Motors' Electro-Motive Division of the United States in collaboration with ASEA of Sweden. It was rolled out from EMD's La Grange, Illinois plant on May 1, 1975. [1] Equipped with close to standard C-C HTC trucks and traction motors, it was designed for lower-speed drag freight service.
[edit] Motives
At the time, high oil prices had a number of large US railroads contemplating electrification of their most heavily used lines, while the only major US railroad with freight-hauling electrification, the Penn Central, had a fleet of aging locomotives needing replacement.
Circumstances changed after the GM6C and GM10B locomotives were developed; oil prices declined, which wiped out the interest freight railroads had in electrification, while diesel locomotive power and adhesion were improved.
Meanwhile, the bankruptcy of Penn Central led to the division of the railroad's physical plant between Amtrak, which inherited much of the electrified region, and Conrail. Deteriorating relationships between the two led to Conrail ceasing electric operations in 1982, dismantling the electrification on its lines and avoiding Amtrak-owned rails. The two locomotives were now surplus to requirements and were returned to EMD, remaining in the LaGrange plant's yard until scrapping in the mid 1980s.
The BC Rail GF6C locomotives used similar technology to the GM6C but had a wide-nose cab and carbody.
[edit] References
- ^ Graham-White, Sean (2007), “EMD's Freight Electrics”, Diesel Era (Withers) 18 (5): 48–54, ISSN 1049-5622
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