| Queensland Railways 1250 class | |
| Powertype: | Diesel-electric |
| Builder: | English Electric, Rocklea |
| Builddate: | 1959–1963 |
| Totalproduction: | 17 |
| Britishclass: | Co-Co |
| Wheeldiameter: | 3feet |
| Wheelbase: | 40feet total, 12feet bogie |
| Length: | 49feet over headstocks |
| Width: | 9feet |
| Axleload: | 15LT |
| Locoweight: | 90LT |
| Fueltype: | Diesel |
| Fuelcap: | 750impgal |
| Primemover: | English Electric 12SVT mark 2 |
| Rpmrange: | 400–850 rpm |
| Enginetype: | four stroke, four valves per cylinder |
| Aspiration: | turbocharged |
| Generator: | English Electric English Electric 822 |
| Tractionmotors: | English Electric English Electric 525 |
| Cylindercount: | 12 vee |
| Cylindersize: | 10x |
| Transmission: | electric |
| Multipleworking: | 110V, stepless electro-pneumatic throttle (1255-1266 only fitted) |
| Poweroutput: | 1395-1NaN-1 gross, 1240-1NaN-1 net (1250-1254) 1540-1NaN-1 gross, 1390-1NaN-1 net (1255-1266) |
| Tractiveeffort: | 402001NaN1 at 9.4-1NaN-1(1250-1254) 465001NaN1 at 9.4-1NaN-1 (1255-1266) |
| Locobrakes: | air |
| Trainbrakes: | air |
| Operator: | Queensland Railways |
| Numinclass: | 17 |
| Fleetnumbers: | 1250-1266 |
| Firstrundate: | 23 July 1959 |
| Lastrundate: | 24 November 1987 |
| Preservedunits: | 1262, 1263 |
| Disposition: | 2 preserved, 15 scrapped |
The 1250 class were a class of diesel locomotive built by English Electric, Rocklea for Queensland Railways between 1959 and 1963.
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 1035-1NaN-1 engine and screw couplers.
The subsequent units fitted with a 1145-1NaN-1 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.
Two were withdrawn in the early 1980s, donating parts to the rebuild of the single 1225 class locomotive. The remainder were withdrawn in 1987.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]
| Number | Serial number | In service | Withdrawn | Scrapped | Notes | |
|---|---|---|---|---|---|---|
| 1250 | A.025 | |||||
| 1251 | A.026 | |||||
| 1252 | A.027 | |||||
| 1253 | A.028 | |||||
| 1254 | A.029 | |||||
| 1255 | A.043 | |||||
| 1256 | A.044 | |||||
| 1257 | A.045 | |||||
| 1258 | A.046 | |||||
| 1259 | A.047 | |||||
| 1260 | A.048 | |||||
| 1261 | A.049 | |||||
| 1262 | A.050 | Preserved, Queensland Rail Heritage Division, Workshops Rail Museum | ||||
| 1263 | A.051 | Preserved, Australian Railway Historical Society | ||||
| 1264 | A.052 | |||||
| 1265 | A.074 | |||||
| 1266 | A.075 |