110V, stepless electro-pneumatic throttle (1255-1266 only fitted)
Loco brake
air
Train brakes
air
Performance figures
Maximum speed
50 miles per hour (80km/h)
Power output
1,395hp (1,040kW) gross, 1,240hp (920kW) net (1250-1254) 1,540hp (1,150kW) gross, 1,390hp (1,040kW) net (1255-1266)
Tractive effort
40,200lbf (178.8kN) at 9.4mph (20km/h)(1250-1254) 46,500lbf (206.8kN) at 9.4mph (20km/h) (1255-1266)
Career
Operators
Queensland Railways
Number in class
17
Numbers
1250-1266
First run
23 July 1959
Last run
24 November 1987
Preserved
1262, 1263
Disposition
2 preserved, 15 scrapped
History
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 1,035kW (1,390hp) engine and screw couplers.
The subsequent units fitted with a 1,145kW (1,540hp) 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 & disposal
Two were withdrawn in the early 1980s, donating parts to the rebuild of the single 1225 class locomotive. The remainder were withdrawn in 1987.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]
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 Townsville
Status table
Number
Serial number
In service
Withdrawn
Scrapped
Notes
1250
A.025
22 July 1959
20 March 1987
December 1989
1251
A.026
27 August 1959
16 November 1987
December 1989
1252
A.027
21 September 1959
12 October 1980
September 1985
1253
A.028
4 November 1959
24 September 1987
December 1989
1254
A.029
30 December 1959
3 November 1987
December 1989
1255
A.043
4 September 1960
6 November 1987
December 1990
1256
A.044
4 November 1960
6 November 1987
December 1990
1257
A.045
24 November 1960
24 November 1987
December 1990
1258
A.046
15 December 1960
5 November 1987
December 1990
1259
A.047
27 January 1961
11 September 1987
December 1989
1260
A.048
26 September 1961
16 November 1987
December 1990
1261
A.049
26 September 1961
16 November 1987
December 1990
1262
A.050
27 October 1961
3 November 1987
Preserved, Queensland Rail Heritage Division, Workshops Rail Museum
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