The design of the 1250 class was unusual being a cab unit with a cab similar to the 1200 class but with a narrow long hood.[1] They were based on a design built for use in Brazil five years prior.
The first five units had a 1,035 kW (1,390 hp) engine and screw couplers.
The subsequent units fitted with a 1,145 kW (1,540 hp) engine, auto couplers and were wired for multiple unit operation.
They were used on ore traffic on the Great Northern line, and on general freight on the North Coast and Southern lines.[1][2][3] A characteristic addition to the 1250 class in 1961 was a sun visor to help reduce glare.
Withdrawal & disposaledit
Two were withdrawn in the early 1980s, donating parts to the rebuild of the single 1225 class locomotive. The remainder were withdrawn in 1987. Two units have been preserved:[1][4]
^Diesel Locomotives Association of Tourist Railways Queensland 13 March 2011
December 15, 2023
queensland, railways, 1250, class, 1250, class, were, class, diesel, locomotive, built, english, electric, rocklea, queensland, railways, between, 1959, 1963, cutaway, 1262, workshops, rail, museum, north, ipswich, october, 2011type, originpower, typediesel, e. The 1250 class were a class of diesel locomotive built by English Electric Rocklea for Queensland Railways between 1959 and 1963 Queensland Railways 1250 classCutaway 1262 at the Workshops Rail Museum North Ipswich in October 2011Type and originPower typeDiesel electricBuilderEnglish Electric RockleaBuild date1959 1963Total produced17SpecificationsConfiguration CommonwealthCo CoGauge1 067 mm 3 ft 6 in Wheel diameter3 ft 1 1 2 in 0 953 m Wheelbase40 ft 6 in 12 344 m total 12 ft 6 in 3 810 m bogieLength49 ft 6 in 15 088 m over headstocksWidth9 ft 2 in 2 794 m Axle load15 long tons 15 2 t 16 8 short tons Loco weight90 long tons 91 4 t 100 8 short tons Fuel typeDieselFuel capacity750 imp gal 3 400 L Prime moverEnglish Electric 12SVT mark 2RPM range400 850 rpmEngine typefour stroke four valves per cylinderAspirationturbochargedGeneratorEnglish Electric English Electric 822Traction motorsEnglish Electric English Electric 525Cylinders12 veeCylinder size10 in 12 in 254 mm 305 mm TransmissionelectricMU working110V stepless electro pneumatic throttle 1255 1266 only fitted Loco brakeairTrain brakesairPerformance figuresMaximum speed50 miles per hour 80 km h Power output1 395 hp 1 040 kW gross 1 240 hp 920 kW net 1250 1254 1 540 hp 1 150 kW gross 1 390 hp 1 040 kW net 1255 1266 Tractive effort40 200 lbf 178 8 kN at 9 4 mph 20 km h 1250 1254 46 500 lbf 206 8 kN at 9 4 mph 20 km h 1255 1266 CareerOperatorsQueensland RailwaysNumber in class17Numbers1250 1266First run23 July 1959Last run24 November 1987Preserved1262 1263Disposition2 preserved 15 scrapped Contents 1 History 2 Withdrawal amp disposal 3 Status table 4 ReferencesHistory edit nbsp 1251 in Gympie yard hauling a northbound freight train including a new 3100 class locomotive being delivered to Gladstone in 1987The design of the 1250 class was unusual being a cab unit with a cab similar to the 1200 class but with a narrow long hood 1 They were based on a design built for use in Brazil five years prior The first five units had a 1 035 kW 1 390 hp engine and screw couplers The subsequent units fitted with a 1 145 kW 1 540 hp engine auto couplers and were wired for multiple unit operation They were used on ore traffic on the Great Northern line and on general freight on the North Coast and Southern lines 1 2 3 A characteristic addition to the 1250 class in 1961 was a sun visor to help reduce glare Withdrawal amp disposal editTwo were withdrawn in the early 1980s donating parts to the rebuild of the single 1225 class locomotive The remainder were withdrawn in 1987 Two units have been preserved 1 4 1262 was retained by the Queensland Rail Heritage Division and is on static display as a cutaway at the Workshops Rail Museum North Ipswich 1263 is owned by the Australian Railway Historical Society and stored in TownsvilleStatus table editNumber Serialnumber In service Withdrawn Scrapped Notes1250 A 025 22 July 1959 20 March 1987 December 19891251 A 026 27 August 1959 16 November 1987 December 19891252 A 027 21 September 1959 12 October 1980 September 19851253 A 028 4 November 1959 24 September 1987 December 19891254 A 029 30 December 1959 3 November 1987 December 19891255 A 043 4 September 1960 6 November 1987 December 19901256 A 044 4 November 1960 6 November 1987 December 19901257 A 045 24 November 1960 24 November 1987 December 19901258 A 046 15 December 1960 5 November 1987 December 19901259 A 047 27 January 1961 11 September 1987 December 19891260 A 048 26 September 1961 16 November 1987 December 19901261 A 049 26 September 1961 16 November 1987 December 19901262 A 050 27 October 1961 3 November 1987 Preserved Queensland Rail Heritage Division Workshops Rail Museum1263 A 051 22 November 1961 16 November 1987 Preserved Australian Railway Historical Society1264 A 052 18 April 1962 20 November 1987 December 19901265 A 074 25 July 1963 21 September 1987 December 19891266 A 075 31 July 1963 7 October 1987 December 1989References edit a b c Electric 1250 Class Queensland s Railway Interest Group Oberg Leon 2007 Locomotives of Australia 1850s 2007 Rosenberg Publishing pp 306 307 ISBN 978 1877058547 1250 amp 1270 Class Queensland s Great Trains Diesel Locomotives Association of Tourist Railways Queensland 13 March 2011 Retrieved from https en wikipedia org w index php title Queensland Railways 1250 class amp oldid 1167834095, wikipedia, wiki, book, books, library,