Sri Lanka Railways W1

Sri Lanka Railways Class W1

Class W1 No. 663
Type and origin
Power type Diesel
Builder Rheinstahl Henschel
Model DHG-1200 [1]
Build date 1969
Total produced 45
Rebuilder Sri Lanka Railways
Specifications
AAR wheel arr. B-B
Gauge 1,676 mm (5 ft 6 in)
Length 12.8 metres (41 ft 11 7⁄8 in)[2]
Loco weight 60.5 t (59.5 long tons; 66.7 short tons)
Prime mover Paxman 12YJXL[1]
RPM range 1500
Engine type V12 4 stroke diesel[1]
Transmission Voith L 520 R U2 [3]
Train brakes Vacuum
Performance figures
Maximum speed 80 km/h (50 mph)
Power output 1,150 hp (860 kW)
Career
Operators Sri Lanka Railways
Class W1
Number in class 45
Locale Sri Lanka
Delivered 1969
Retired 1990?
10 locomotives from W1 class were later fitted with new engines and renumbered as W3 class.

The Sri Lanka Railways Class W1 is a class of Sri Lankan diesel hydraulic locomotive that was built by Rheinstahl Henschel in 1969. A total of 45 W1s were built and imported. This is the first diesel-hydraulic locomotive which ran on Sri Lankan rail.

Origins

The history of W1 begins in 1969. 45 of W1s were imported to Sri Lanka which made W1 the most numerous class of SLR locomotives that time. At that time only Class M1 and Class M2 locomotives were in operation. Most of other services were carried out by steam locomotives. But with the introduction of W1s most of steam locomotives were taken out of service and those services were taken by W1. This locomotive has used for SLR's famous Udarata Menike train for about 25 years. Also this locomotive can be operated on any of railway lines in Sri Lanka.[2]

Decline

By 90's most of W1s were out of service all because of problems in the prime-mover and some due to serious accident damages. These condemned locomotives were scrapped.[2]

In Service

With declination of W1s 2 locomotives (650 & 657) were fitted with new Paxman VEGA SE/RP 160[1] prime movers of power 1250 HP. By 2011 only 2 of them were in running condition. Those were used in light duties. By 2012 none of W1s were in operation

Class W3

Sri Lanka Railways Class W3

W3 No. 673
Type and origin
Power type Diesel
Model DH3 1200
Rebuilder Sri Lanka Railways, Adtranz
Rebuild date 1997
Number rebuilt 10
Specifications
AAR wheel arr. B-B
Gauge 1,676 mm (5 ft 6 in)
Prime mover Catepillar 3512 DI-TA [2]
Transmission Voith L 520 R U2
MU working Yes
Loco brake Air, Hydro-Dynamic
Train brakes Air, Vacuum
Performance figures
Power output 1,200 hp (890 kW)
Career
Disposition Active
No. 631, 636, 638, 647, 659, 665, 666, 667, 669 and 673 W1 locomotives were reclassified as W3.
Class W3

In 1997, 10 Class W1 locomotives were extensively refurbished. SLR and Adtranz involved in this. During these refurbishment the locomotives were fitted with new power plants, power transmission systems and electronic engine control systems. As well as a full new repaint of Blue and Silver was undertaken.

After the extensive refurbishment, the locomotives were reclassified as the W3-class.

See also

References

  1. 1 2 3 4 "Class W1". Sri Lanka Railways Info Page. Retrieved 18 November 2013.
  2. 1 2 3 4 "෴W1 දුම්රිය එන්ජිම - ශ්‍රී ලංකාවට ගෙනා මුල්ම ඩීසල් හයිඩ්‍රොලික් වර්ගයේ දුම්රිය එන්ජිම෴". Loco Lanka. Retrieved 18 November 2013. zero width joiner character in |title= at position 24 (help)
  3. ↑ https://web.archive.org/web/20131029195606/http://www.srilankanlocos.com/data/data.html. Archived from the original on October 29, 2013. Retrieved July 9, 2011. Missing or empty |title= (help)
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