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 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]
Gunzburg, Adrian (1968). WAGR Locomotives 1940–1968. Perth: Australian Railway Historical Society (Western Australian Division). pp. 35, 48. OCLC 219836193.
Milne, Rod (1998). Westrail's English Electric Experience (The English Electric locomotives of the WAGR). Elizabeth, SA: Railmac Publications. ISBN0958650098.
Media related to WAGR R class (diesel) at Wikimedia Commons
December 27, 2022
wagr, class, diesel, class, diesel, locomotives, built, english, electric, rocklea, western, australian, government, railways, between, 1969, 1972, they, were, revised, version, class, western, australian, government, railways, classtype, originpower, typedies. 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 Western Australian Government Railways RA classType and originPower typeDiesel electricBuilderEnglish Electric RockleaSerial numberA 202 A 207 A 218 A 222 A 244 A 248Build date1968 72Total produced13SpecificationsConfiguration AARC C UICCo Co Co Co Gauge1 067 mm 3 ft 6 in BogiesEnglish Electric low weight transferWheel diameter3 ft 1 1 2 in 0 953 m Minimum curve264 ft 80 467 m Wheelbase44 ft 2 in 13 462 m total 11 ft 3 in 3 429 m bogieLength53 ft 6 in 16 307 m over headstocksWidth9 ft 4 in 2 845 m Height13 ft 3 962 m Axle load15 5 long tons 15 7 t 17 4 short tons Loco weight93 long tons 94 t 104 short tons Fuel typeDieselFuel capacity1 200 imp gal 5 500 L Coolant cap 200 imp gal 910 L Prime moverEE 12CSVT Mk IIRPM range850rpmEngine typefour stroke four valves per cylinderAspirationturbo intercooledGeneratorEE822 16JTraction motorsEE548Cylinders12 VeeCylinder size10 in 12 in 254 mm 305 mm MU working110V stepless electro pneumatic throttleLoco brakeAir proportional controlTrain brakesDual air and vacuumPerformance figuresMaximum speed60 miles per hour 97 km h Power output1 950 hp 1 450 kW gross 1 795 hp 1 340 kW netTractive effort Starting67 000 lbf 298 0 kN Continuous50 500 lbf 224 6 kN at 10 8 mph 20 km h CareerOperatorsWestern Australian Government RailwaysDisposition12 scrapped 1 preserved Contents 1 Description 2 History 3 Class list 4 ReferencesDescription EditThe 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 EditFollowing 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 EditKey In Service Withdrawn Preserved Converted ScrappedSerial Number Entered Service Road Number Current Last Owner StatusA 203 November 8 1969 RA1906 Westrail Scrapped Midland Workshops October 1992 A 204 November 21 1969 RA1907 Westrail Scrapped Midland Workshops October 1992 A 205 December 3 1969 RA1908 Westrail Scrapped Midland Workshops October 1992 A 206 December 23 1969 RA1909 Westrail Scrapped Midland Workshops October 1992 A 202 February 6 1970 RA1910 Westrail Scrapped Midland Workshops October 1992 A 207 February 5 1970 RA1911 Westrail Scrapped Midland Workshops October 1992 A 218 April 8 1971 RA1912 Westrail Scrapped Midland Workshops October 1992 A 219 March 4 1971 RA1913 Westrail Scrapped Midland Workshops October 1992 A 220 May 6 1971 RA1914 KA211 UGL Rail Used as an engine test bed at UGL BassendeanA 221 May 6 1971 RA1915 Westrail Scrapped Midland Workshops October 1992 A 222 March 17 1971 RA1916 Westrail Scrapped Midland Workshops October 1992 A 244 July 11 1972 RA1917 KA212 Qube Scrapped Bellevue May 29 2016 A 248 July 19 1972 RA1918 KA213 Rail Heritage WA Preserved by Rail Heritage WA BassendeanReferences Edit a b Oberg Leon 1984 Locomotives of Australia 1850s 1980s Frenchs Forest Reed Books p 260 ISBN 0 730100 05 7 Oberg Leon 2010 Locomotives of Australia 1850s 2010s Kenthurst Rosenberg Publishing pp 351 352 ISBN 9781921719011 R Class WA diesel Railpage RA Class WA diesel Railpage KA Class WA diesel Railpage Diesel Locomotives Rail Heritage WA Gunzburg Adrian 1968 WAGR Locomotives 1940 1968 Perth Australian Railway Historical Society Western Australian Division pp 35 48 OCLC 219836193 Milne Rod 1998 Westrail s English Electric Experience The English Electric locomotives of the WAGR Elizabeth SA Railmac Publications ISBN 0958650098 Media related to WAGR R class diesel at Wikimedia Commons Retrieved from https en wikipedia org w index php title WAGR RA class diesel amp oldid 1113657536, wikipedia, wiki, book, books, library,
