GMD GMDH-1

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GMD GMDH-1

Power type	diesel
Builder	General Motors Diesel
AAR wheel arr.	B-B
Total weight	First 2: 52 tons (47 tonnes) Second 2: 74 tons (67 tonnes)
Prime mover	First 2: 2 × Detroit Diesel model 110 Second 2: 2 × Detroit Diesel model 71
Transmission	hydraulic
Power output	First 2: 600 hp (450 kW) First 2: 800 hp (600 kW)

The GMD GMDH-1 was an experimental diesel-hydraulic switching locomotive built by General Motors Diesel of Canada. Four examples were built.^[1] It was a double-ended, center-cab design. The first two locomotives were each fitted with a pair of 6-cylinder Detroit Diesel model 110 engines giving 600 hp, while the second pair had two model 71 engines developing 800 hp.

The first constructed, in December 1956, was serial #A1597, numbered GMDD 1001.^[2] It became the GMD London, Ontario plant switcher in April 1958, and was retired in November 1975. The locomotive was given to the Canadian Railway Historical Association in July 1977, and passed into the collection of the Canada Science and Technology Museum in November 1986.^[3]

The second locomotive, serial #A1713, was completed in September 1958, and was first numbered GMDD 600 as a demonstrator. It was later sold to Brazil, where it was RFFSA 600 and later Rio Grande do Sul 6031.^[4] The unit is reported as having been subsequently scrapped.^[5]

The third and fourth locomotives, #A1811 and #A1812, were constructed in September and October 1959 respectively; they were initially given GMDD 800 and 801. Both were sold to industry. #A1811 passed through a succession of owners.^[6] It was first sold to Electric Reduction Company (ERCO) in May 1961 as their #89; ERC sold it to S.G. Paikin, an equipment dealer, in October 1972, who in turn sold it to Limestone Products in October 1973 as their #3-6902. It was sold once more to Paikin in September 1979, who resold it in February 1980 to Raritan River Steel of Perth Amboy, New Jersey as their #3. It didn't last there, returning to Canada and being rebuilt by Peacock Bros. of Edmonton before passing in January 1981 to Hudson Bay Oil & Gas in Kaybob, Alberta as their #3.^[7] Hudson Oil & Gas became Dome Petroleum and then Amoco Canada Petroleum, for whom the locomotive remains operable.^[8]

#A1812, meanwhile, was purchased by contracting firm Guy F. Atkinson as their #28151. It was re-gauged to 5 ft 6 in (1676 mm) gauge and shipped to Pakistan for the building of the Mangala Dam, where it still resides.^[9]

[edit] References

1. ^ Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, WI: Kalmbach Publishing Co.. ISBN 0-89024-026-4.
2. ^ GMD 1500 to 1599. The UNofficial EMD Homepage. Retrieved on 2006-11-20.
3. ^ Churcher, Colin. Ontario. Industrial Locomotives in Canada. Retrieved on 2006-11-20.
4. ^ GMD 1700 to 1799. The UNofficial EMD Homepage. Retrieved on 2006-11-20.
5. ^ Russell, Larry. EMD Demonstrators Page 3. GM Export Site. Retrieved on 2006-11-20.
6. ^ GMD 1800 to 1899. The UNofficial EMD Homepage. Retrieved on 2006-11-20.
7. ^ Churcher, Colin. Alberta. Industrial Locomotives in Canada. Retrieved on 2006-11-20.
8. ^ Othen, Pat & Othen, David. Unusual Canadian Locomotives. Retrieved on 2006-11-20.
9. ^ Indian/South Asian Industrial Locos. Indian Railways Fan Club (IRFCA). Retrieved on 2006-11-20.

Limited production and export locomotives built by GM-EMD
Electrics:	SW1200MG, AEM-7, GM6, GM10, GF6C
Industrial, military, export and narrow gauge:	Model 40, DDM45, DHI, GMDH-1, GMDH-3, MRS-1, GA8, G8, G12, G16, NF110, NF210, JT42CWR (Series 66), JT42HW-HS, GT46MAC, GT46PAC
Streamliners:	M-10000, M-10001, M-10002, M-10003-6, Pioneer Zephyr, General Pershing Zephyr, Green Diamond, Flying Yankee, Aerotrain
Experimentals:	1800 hp B-B
See also:	List of GM-EMD locomotives