Indian locomotive class YDM-2

The Indian locomotive class YDM-2 is a class of diesel-Hydraulic locomotive that was developed in 1986-90 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for Metre gauge (Y), Diesel (D), Mixed traffic (M) engine, 2nd generation (2). They entered service in 1986. A total of 41 YDM-2 locomotives was built between 1986 and 1990.

A YDM-2 hauling a Goods train
Type and origin
Power typeDiesel
DesignerChittaranjan Locomotive Works
BuilderChittaranjan Locomotive Works
Build date1986-1990
Total produced41
Specifications
Configuration:
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 • CommonwealthBo-Bo
Gauge1,000 mm (3 ft 3 3⁄8 in) metre gauge
Loco weight41,000 kg (90,000 lb)
Power supply110 V DC supply
TransmissionDiesel-Hydraulic
Loco brakeAir brake
Train brakesVacuum brake
Performance figures
Maximum speed75 km/h (47 mph)
Power output700 hp (520 kW)
Tractive effort14.400 t (14 long tons; 16 short tons)
Career
Numbers2001-2041
DispositionRetired

History

The history of YDM-2 begins in the early 1980s with the stated aim of the Indian Railways to remove steam locomotives from Indian rails after recommendation of Karnail Singh Fuel Committee.[1] Therefore required building a large number of Meter gauge diesel locomotives. Thus Indian Railways began looking at various diesel-electric designs. These locomotives were designed by CLW[2][3] for hauling both passenger and freight traffic. They used suri transmission similar to one used in the broad gauged WDM-3. 41 of these locomotives were built and they were initially homed at Moula Ali (MLY) diesel loco shed in Southern Central Railways division (SCR). After Moula Ali line was converted to Broad gauge, these locomotives were transferred to Golden rock(GOC) shed in the Southern Railway Zone. They hauled passenger and goods trains till the late 2000s when the meter gauge lines were converted to broad gauge. All units are now withdrawn from service and all units are believed to be scrapped.

Former sheds
  • Moula Ali (MLY)
  • Golden Rock (GOC)
  • All the locomotives of this class have been withdrawn from service.
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See also


References
  1. "Report of the expert Committee on Coal Consumption on Railways, 1958". INDIAN CULTURE. Retrieved 2020-04-29.
  2. [IRFCA] Indian Railways FAQ: Locomotives – Specific classes : Meter Gauge & Narrow Gauge Diesel
  3. [IRFCA] Indian Railways FAQ: Diesel and Electric Locomotive Specifications
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