Indian locomotive class YDM-1

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Indian locomotive class YDM-1
Indian diesel locomotive, class YDM1R, No 6002.jpg
A YDM-1 class locomotive no 6002 preserved at National Rail Museum, New Delhi
Type and origin
Power typeDiesel
Designer North British Locomotive Company (NBL)
Builder North British Locomotive Company (NBL)
Order numberPR/4574/S/4910/52
Build date1954–1956
Total produced20
Rebuilder CLW
Rebuild date1974–1976
Number rebuilt20
Specifications
Configuration:
​
 •  AAR B'-B'
 •  UIC B-B
 • Commonwealth Bo-Bo
Gauge 1,000 mm (3 ft 3+3⁄8 in) metre gauge
Wheel diameter804 mm (31.65 in)
Wheelbase 2,134 mm (84.02 in) ​
 • Engine1
Length:
​
 • Over couplers12.020 m (39 ft 5+1⁄4 in)
 • Over body10.630 m (34 ft 10+1⁄2 in)
Width2,743 mm (9 ft 0 in)
Height3,421 mm (11 ft 2+5⁄8 in)
Axle load 11,000 kg (24,000 lb)
Loco weight43,680 kg (96,300 lb)
Fuel type Diesel
Fuel capacity3,724 L (819 imp gal; 984 US gal)
Lubricant cap.200 L (44 imp gal; 53 US gal)
Coolant cap.204 L (45 imp gal; 54 US gal)
Sandbox cap.0.35 L (0.077 imp gal; 0.092 US gal)
Power supply 110 V DC supply
Prime mover Earlier Paxman V12 RPHXL II, 625/580hp replaced by Mak/CLW L6 6M 282 A(K), 700hp
RPM:​
 • RPM low idle525
 • RPM idle525
 • Maximum RPM1250
Engine type12RPHXL/II
Aspiration Turbo-supercharged
Alternator Boom Wade N5
Generator C.A.V D3-9
Head end power 110 V DC
Cylinders 12
TransmissionVoith hydraulic with Cardan shaft drive to bogies
MU working 2
Loco brake Air brake, hand brakes,
Train brakes Vacuum brake
Compressor494 L (109 imp gal; 131 US gal)
Exhauster852 L (187 imp gal; 225 US gal)
Performance figures
Maximum speed83 km/h (52 mph)
Power outputEarlier Paxman V12 RPHXL II 580 hp (430 kW) replaced by Mak/CLW L6 6M 282 A(K) 700 hp (520 kW)
Tractive effort:
​
 • Starting10.320 t (10 long tons; 11 short tons)
 • Continuous08.230 t (8 long tons; 9 short tons)
Career
Operators Indian Railways
Class Earlier 'DY' class
Numbers6000-6019
Locale Western Railway zone
First run1955-56
Last run1995
Retired1995
Withdrawn1990s
Preserved3(6002, 6008, 6015)
Scrapped2000s
Current ownerNRM, ICF resume
DispositionAll except 3 scrapped

The Indian locomotive class YDM-1 is a class of diesel-Hydraulic locomotive that was developed in 1954 by North British Locomotive Company (NBL) for Indian Railways. Its class designation denotes a metre gauge (Y) diesel (D) mixed traffic (M) locomotive of the 1st generation (1). They entered service in 1955. A total of 20 YDM-1 locomotives was built between 1954 and 1956, which made them among the first metre-gauge main-line diesels.

Contents

The YDM-1 served both passenger and freight trains for over 46 years. As of January 2020, all 20 locomotives have been withdrawn from service with 3 locomotives being preserved at various location around India.

History

These locomotives originally called 'DY' class was imported from North British Locomotive Company (NBL) to haul goods and passenger rakes in Western Railways particularly around Gandhidham due to of scarcity of water for steam locomotives. These are among the first Metre Gauge main-line diesels locomotives of India.

The YDM-1 class locomotives are the survivors from the second batch of North British diesel locos supplied in 1955. They were homed at a specifically made Diesel shed in Gandhidham. CLW replaced the engines on these with Maybach engines around 1975. Western Railways phased these locos out in the end of the 1990s (December 1999) from mainline service and from shunting duties in Ajmer on 15 February 2001. YDM-1 6002 came at NRM from Wankaner in August 2003 after renovation at Ajmer Loco Workshop.

Specification

A YDM-1 hauling an inspection special Indian locomotive class YDM-1.jpg
A YDM-1 hauling an inspection special
Original NoNo 3001 to 3020
Maker's Name & NoNorth British; Locomotive Co. Glasgow, UK, 27507
BuildersNorth British Locomotive
EnginePaxman V12 RPHXL II, 625/580 hp replaced by Mak/CLW L6 6M 282 A(K), 700 hp
TransmissionVoith hydraulic with Cardan shaft drive to bogies
Year Built1954
Gear BoxDavid Brown, UK
Wheel ArrangementB-B
Hauling Power10,977 kg
Tare Weight42 Tonnes
Gauge1 Metre
CostRs. 4,85,209/- (Capital Head)
RemarksFitted with Automatic, Vacuum & Air Brake System
First TripFrom Gandhi Dham to Palanpur
Last Serviceworked for Kandla Port and Naliya etc.

Preserved Examples

A total of three YDM-1 locomotives have been preserved all over India. [1] [2]

ClassManufacturerLoco NumberPrevious shedNameLiveryLocationref
YDM-1NBL6002GandhidhamOrange with twin black stripesplinthed at National Railway Museum, Delhi (NRM) [3]
YDM-1RNBL6008GandhidhamLight blue/red/dark bluePreserved at Regional Rail Museum, Chennai. [4]
YDM-1NBL6012GandhidhamNavy blue with yellow stripePreserved at Regional Rail Museum, Chennai. [5]

Former shed

See also

References

  1. ↑ "Ministry of Railways (Railway Board)". www.indianrailways.gov.in. Retrieved 2020-04-14.
  2. ↑ "preserve loco list".
  3. ↑ https://www.irfca.org/apps/locos/show/217?list_type=preserved [ dead link ]
  4. ↑ https://www.irfca.org/apps/locos/show/223?list_type=preserved [ dead link ]
  5. ↑ https://www.irfca.org/apps/locos/show/230?list_type=preserved [ dead link ]
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