WAGR R class (diesel)

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Western Australian Government Railways R class
R1905 Manjimup, 1986.JPG
R1905 at Manjimup in July 1986
Type and origin
Power typeDiesel-electric
Builder English Electric, Rocklea
Serial numberA.166-A.167, A.171, A.173-A.174
Build date1968
Total produced5
Specifications
Configuration:
   AAR C-C
   UIC Co-Co
Gauge 1,067 mm (3 ft 6 in)
Bogies English Electric low weight transfer
Wheel diameter3 ft 1+12 in (0.953 m)
Minimum curve 264 ft (80.467 m)
Wheelbase 40 ft 8 in (12.395 m) total, 11 ft 3 in (3.429 m) bogie
Length50 ft (15.240 m) over headstocks
Width9 ft 4 in (2.845 m)
Height13 ft (3.962 m)
Axle load R1901-R1902: 15 long tons (15 t; 17 short tons), R1903-R1905: 16 long tons (16 t; 18 short tons)
Loco weightR1901-R1902: 88 long tons (89 t; 99 short tons)
R1903-R1905: 95.5 long tons (97.0 t; 107.0 short tons)
Fuel type Diesel
Fuel capacity1,200 imp gal (5,500 L)
Coolant cap.200 imp gal (910 L)
Prime mover EE 12CSVT Mk II
RPM range850rpm
Engine typefour stroke, four valves per cylinder
Aspirationturbo, intercooled
Generator EE822/16J
Traction motors EE548
Cylinders 12 Vee
Cylinder size 10 in × 12 in (254 mm × 305 mm)
MU working 110V, stepless electro-pneumatic throttle
Loco brake Air, proportional control, dynamic
Train brakes Dual air and vacuum
Performance figures
Maximum speed60 miles per hour (97 km/h)
Power output1,950 hp (1,450 kW), gross, 1,795 hp (1,340 kW) net
Tractive effort 50,500 lbf (224.6 kN) at 10.8 mph (20 km/h)
Career
Operators Western Australian Government Railways
Number in class5
NumbersR1901-R1905
First runFebruary 12th, 1968
Disposition5 scrapped

The R Class are diesel locomotives built by English Electric, Rocklea for the Western Australian Government Railways in 1968. They were followed by the revised RA class.

Contents

Description

The R class were a hood type general purpose diesel-electric locomotive. They were similar to the Queensland Railways 1300 class. All equipment, except traction motors, were interchangeable with the standard gauge K class. The bogies are an English Electric design with low weight transfer characteristics. They feature fully equalised primary spring gear, all traction motors in each bogie mounted with the nose-suspension facing inwards, traction thrust at near axle level and long pivot centres to reduce inter-bogie transfer. Adhesion loss at maximum tractive effort is limited to 4.5 per cent allowing 1,830 long tons (1,860 t; 2,050 short tons) trailing load to be hauled up a 1 in 100 grade. [1]

History

In 1968 the Western Australian Government Railways took delivery of five narrow gauge versions of the K class for use on bauxite traffic, the last three being fitted with 6 tonnes (5.9 long tons; 6.6 short tons) of ballast to improve their tractive effort. All were fitted with dynamic brakes. [2] [3] [4]

Class list

Serial numberEntered serviceRoad numberLast ownerStatus
A.16612 February 1968R1901 Westrail Scrapped, Midland Workshops (October 1992)
A.16715 March 1968R1902 Greentrains Scrapped, Bellevue (28 May 2016)
A.1712 May 1968R1903WestrailScrapped, Midland Workshops (October 1992)
A.17314 June 1968R1904WestrailScrapped, Midland Workshops (October 1992)
A.17426 June 1968R1905WestrailScrapped, Midland Workshops (October 1992)

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References

  1. Railway Transportation, April 1968, 'Low weight transfer bogie is feature of new WAGR diesels'
  2. Oberg, Leon (1984). Locomotives of Australia 1850s-1980s. Frenchs Forest: Reed Books. p. 260. ISBN   0-730100-05-7.
  3. Oberg, Leon (2010). Locomotives of Australia 1850s-2010s. Kenthurst: Rosenberg Publishing. pp. 351–352. ISBN   9781921719011.
  4. R Class (WA, diesel) Railpage

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