Construction began at the TGR's Inveresk Workshops in 1961, and three of the planned eight were completed relatively quickly. However, construction of the other five was slow, with the last not being delivered until 1971, by which time the design had become dated.
Technical details
The Y class were fitted with an English Electric 6SRKT Mark II (Mark III on last two) in-line six turbochargeddiesel engine. They have a Bo-Bo wheel arrangement and end-platforms, making them visually different from the X class.[1]
In line with standard TGR practice of the time, they were fitted with hook-and-link couplers and vacuum train brakes (air on locomotive). With a light tractive weight of only 58 tonnes, a reasonably powerful engine of 825 horsepower (615 kW) and a fairly basic bogie design, gaining traction on long uphill grades was found to be difficult. They were noted to have a tendency to wheel-slip badly. Nevertheless, they were considered successful.
Later years
In March 1978, the Y class were included in the transfer of the Tasmanian Government Railways to Australian National. With the new transfer of twenty 830 class locomotives from South Australia and later purchase of ZB class and ZC class locomotives from Queensland Rail, the Y class were made redundant.
In the late 1970s and early 1980s, all members of the Y class were retrofitted with stronger automatic couplers, which had by then become standard equipment. Y1 & Y5 also received air train brakes in 1985,[2] with the others withdrawn following the cessation of vacuum braked services in 1988. Most of these where been preserved at this stage. With Y2 going to Derwent Valley Railway, Y3 going to Queen Victoria Museum & Art gallery, Launceston, Y4 to Tasmanian Transport Museum and finally Y6&8 to Don River Railway. With Tasrail retaining Y7 for parts.[3]
Y7 was rebuilt in 2001 as a driving van for use on Railton to Devonport cement trains. With this finally stored in 2017.[4] Two members of the class remained in regular service with TasRail, renumbered as the 2150 class, until mid 2016 when stored out of use.
In May 2022, Y1 (2150) & Y5 (2151) where donated for preservation to Derwent Valley Railway and Launceston & North East Railway respectively. Only leaving DV1, formally Y7, not preserved.
tasmanian, government, railways, class, class, class, diesel, locomotives, built, tasmanian, government, railways, between, 1961, 1971, preserved, queen, victoria, museum, gallery, launceston, june, 2013type, originpower, typediesel, electricbuildertasmanian, . The Y class is a class of diesel locomotives built by the Tasmanian Government Railways between 1961 and 1971 Tasmanian Government Railways Y classPreserved Y3 at the Queen Victoria Museum and Art Gallery Launceston in June 2013Type and originPower typeDiesel electricBuilderTasmanian Government Railways InvereskBuild date1961 1971Total produced8SpecificationsConfiguration UICBo BoGauge1 067 mm 3 ft 6 in Wheel diameter3 ft 0 1 2 in 0 927 m Minimum curve250 ft 76 200 m Wheelbase23 ft 10 in 7 264 m total 8 ft 2 438 m bogieLength44 ft 9 in 13 640 m over buffers 41 ft 7 in 12 675 m over headstocksWidth8 ft 10 1 2 in 2 705 m Height12 ft 2 1 2 in 3 721 m Axle load14 5 long tons 14 7 t 16 2 short tons Loco weight58 long tons 59 t 65 short tons Fuel typeDieselFuel capacity500 imp gal 2 273 045 L Lubricant cap 95 imp gal 431 879 L Prime moverEnglish Electric 6SRKT Mk IIRPM range850 rpm maxEngine typefour stroke four valves per cylinderAspirationturbochargedTraction motorsEnglish Electric 537CylindersInline 6Cylinder size10 in 12 in 254 mm 305 mm MU working90V nine notch electro magnetic controlLoco brakestraight air proportional controlTrain brakesVacuum Y1 amp Y5later converted to air Performance figuresMaximum speed45 miles per hour 72 km h Power output825 hp 620 kW gross 750 hp 560 kW netTractive effort34 000 lbf 151 2 kN at 6 mph 10 km h CareerOperatorsTasmanian Government RailwaysNumber in class8NumbersY1 Y8First run1961Current ownerTasRailDisposition7 preserved 1 converted to driving van Contents 1 History 2 Technical details 3 Later years 4 Status table 5 See also 6 ReferencesHistory EditThe Y class were designed by English Electric and constructed by the Tasmanian Government Railways Inveresk Workshops Eight were built as mainline freight and passenger locomotives between 1961 and 1971 1 Following the success of the X class the Tasmanian Government Railways decided to order additional diesel locomotives English Electric submitted plans that were quite similar to the Jamaican Railways 81 class South Australian Railways 800 class and Midland Railways of Western Australia F class but with a small power increase They were slightly larger and more powerful than the X class 1 They had a similar layout to the X class a long hood unit with the cab at one end Construction began at the TGR s Inveresk Workshops in 1961 and three of the planned eight were completed relatively quickly However construction of the other five was slow with the last not being delivered until 1971 by which time the design had become dated Technical details EditThe Y class were fitted with an English Electric 6SRKT Mark II Mark III on last two in line six turbocharged diesel engine They have a Bo Bo wheel arrangement and end platforms making them visually different from the X class 1 In line with standard TGR practice of the time they were fitted with hook and link couplers and vacuum train brakes air on locomotive With a light tractive weight of only 58 tonnes a reasonably powerful engine of 825 horsepower 615 kW and a fairly basic bogie design gaining traction on long uphill grades was found to be difficult They were noted to have a tendency to wheel slip badly Nevertheless they were considered successful Later years EditIn March 1978 the Y class were included in the transfer of the Tasmanian Government Railways to Australian National With the new transfer of twenty 830 class locomotives from South Australia and later purchase of ZB class and ZC class locomotives from Queensland Rail the Y class were made redundant In the late 1970s and early 1980s all members of the Y class were retrofitted with stronger automatic couplers which had by then become standard equipment Y1 amp Y5 also received air train brakes in 1985 2 with the others withdrawn following the cessation of vacuum braked services in 1988 Most of these where been preserved at this stage With Y2 going to Derwent Valley Railway Y3 going to Queen Victoria Museum amp Art gallery Launceston Y4 to Tasmanian Transport Museum and finally Y6 amp 8 to Don River Railway With Tasrail retaining Y7 for parts 3 Y7 was rebuilt in 2001 as a driving van for use on Railton to Devonport cement trains With this finally stored in 2017 4 Two members of the class remained in regular service with TasRail renumbered as the 2150 class until mid 2016 when stored out of use In May 2022 Y1 2150 amp Y5 2151 where donated for preservation to Derwent Valley Railway and Launceston amp North East Railway respectively Only leaving DV1 formally Y7 not preserved Status table EditImage Original no Final no Name Owner Status Y1 2150 Derwent Valley Railway PreservedY2 Henry Baldwin Derwent Valley Railway Preserved operational 5 Y3 Queen Victoria Museum and Art Gallery Launceston PreservedY4 Rowallan Tasmanian Transport Museum Glenorchy Preserved operational 6 Y5 2151 Sir Charles Gairdner Launceston amp North East Railway Preserved Y6 Don River Railway Devonport Preserved operational 7 Y7 DV1 TasRail Stored 4 Y8 Don River Railway Devonport Preserved derelict 7 See also EditFormer Tasmanian Government Railways locomotives Locomotives of the Tasmanian Government Railways 1950References Edit a b c Y Class Rail Tasmania Tasmania Railway Digest August 1985 page 247 Y Class Tasmania Railpage a b DV1 Rail Tasmania Derwent Valley Railway Rail Tasmania Exhibit Y4 Rail Tasmania a b Locomotives Don River Railway Retrieved from https en wikipedia org w index php title Tasmanian Government Railways Y class amp oldid 1124136740, wikipedia, wiki, book, books, library,
