WAGR RA class (diesel)

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Western Australian Government Railways RA class
Hugh llewelyn RA 1918 (5680395743).jpg
RA1918
Type and origin
Power typeDiesel-electric
Builder English Electric, Rocklea
Serial numberA.202-A.207, A.218-A.222, A.244, A.248
Build date1968-72
Total produced13
Specifications
Configuration:
​
 •  AAR C-C
 •  UIC Co-Co, Co′Co′
Gauge 1,067 mm (3 ft 6 in)
Bogies English Electric low weight transfer
Wheel diameter3 ft 1+1⁄2 in (0.953 m)
Minimum curve 264 ft (80.467 m)
Wheelbase 44 ft 2 in (13.462 m) total, 11 ft 3 in (3.429 m) bogie
Length53 ft 6 in (16.307 m) over headstocks
Width9 ft 4 in (2.845 m)
Height13 ft (3.962 m)
Axle load 15.5 long tons (15.7 t; 17.4 short tons)
Loco weight93 long tons (94 t; 104 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
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:
​
 • Starting67,000 lbf (298.0 kN)
 • Continuous50,500 lbf (224.6 kN) at 10.8 mph (20 km/h)
Career
Operators Western Australian Government Railways
Disposition12 scrapped, 1 preserved

The RA Class are diesel locomotives built by English Electric, Rocklea for the Western Australian Government Railways between 1969 and 1972. They were a revised version of the R class.

Contents

Description

The RA 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 main differences with the R class were a slight increase in length and wheelbase and deletion of the dynamic brake. They were otherwise identical mechanically and electrically.

The bogies were identical to those fitted to the R class and were 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.

History

Following on from the R class, a further 11 were ordered, but without dynamic brakes. A further two were financed by the Lefroy Salt Company for use over a 13-kilometre (8.1 mi) spur off the Esperance line. [1] [2] [3] [4]

In 1973, a version of the RA class with a low nose was ordered for Tasmanian Government Railways, which classed them Z.

In 1974 the RA1914, RA1917 and RA1918 were fitted with standard gauge bogies and renumbered KA211-KA213. [1] [5] RA1918 has been preserved by Rail Heritage WA. [6]

Class list

Key:In ServiceWithdrawnPreservedConvertedScrapped
Serial NumberEntered ServiceRoad NumberCurrent/Last OwnerStatus
A.203November 8, 1969RA1906 Westrail Scrapped, Midland Workshops (October 1992)
A.204November 21, 1969RA1907WestrailScrapped, Midland Workshops (October 1992)
A.205December 3, 1969RA1908WestrailScrapped, Midland Workshops (October 1992)
A.206December 23, 1969RA1909WestrailScrapped, Midland Workshops (October 1992)
A.202February 6, 1970RA1910WestrailScrapped, Midland Workshops (October 1992)
A.207February 5, 1970RA1911WestrailScrapped, Midland Workshops (October 1992)
A.218April 8, 1971RA1912WestrailScrapped, Midland Workshops (October 1992)
A.219March 4, 1971RA1913WestrailScrapped, Midland Workshops (October 1992)
A.220May 6, 1971RA1914, KA211 UGL Rail Used as an engine test bed at UGL Bassendean
A.221May 6, 1971RA1915WestrailScrapped, Midland Workshops (October 1992)
A.222March 17, 1971RA1916WestrailScrapped, Midland Workshops (October 1992)
A.244July 11, 1972RA1917, KA212 Qube Scrapped, Bellevue (May 29, 2016)
A.248July 19, 1972RA1918, KA213 Rail Heritage WA Preserved by Rail Heritage WA, Bassendean

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References

  1. 1 2 Oberg, Leon (1984). Locomotives of Australia 1850s-1980s. Frenchs Forest: Reed Books. p. 260. ISBN   0-730100-05-7.
  2. ↑ Oberg, Leon (2010). Locomotives of Australia 1850s-2010s. Kenthurst: Rosenberg Publishing. pp. 351–352. ISBN   9781921719011.
  3. ↑ R Class (WA, diesel) Railpage
  4. ↑ RA Class (WA, diesel) Railpage
  5. ↑ KA Class (WA, diesel) Railpage
  6. ↑ Diesel Locomotives Rail Heritage WA

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