1,067 mm (3 ft 6 in), 1,435 mm (4 ft 8+1⁄2 in) standard gauge
Wheel diameter
40 in (1,016 mm)
Length
Over headstocks: 44 ft 3 in (13.49 m) Over coupler pulling faces: 48 ft 5 in (14.76 m)
Width
9 ft 9 in (2,972 mm)
Height
14 ft 0 in (4,267 mm)
Axle load
12 long tons 6 cwt (27,600 lb or 12.5 t)
Loco weight
74 long tons 0 cwt (165,800 lb or 75.2 t)
Fuel type
Diesel
Fuel capacity
500 imp gal (2,300 L; 600 US gal)
Lubricant cap.
116 imp gal (530 L; 139 US gal)
Coolant cap.
90 imp gal (410 L; 110 US gal)
Sandbox cap.
10 cu ft (0.28 m3)
Prime mover
Alco 6-251B
RPM range
375–1025
Engine type
Four-stroke inline 6 diesel
Aspiration
Turbocharged
Generator
General Electric 5GT 584
Traction motors
General Electric 761
Cylinders
6
Cylinder size
9 in × 10.5 in (229 mm × 267 mm)
Performance figures
Maximum speed
75 mph (121 km/h)
Power output
Gross: 1,050 hp (780 kW) For traction: 950 hp (710 kW)
Tractive effort
Continuous: 40,200 lbf (178.82 kN) at 8 mph (13 km/h)
Career
Operators
Silverton Tramway Company
Number in class
3
Numbers
27–29
First run
December 1960
Current owner
Genesee & Wyoming Australia Southern Shorthaul Railroad
Disposition
2 in service, 1 scrapped
The Silverton Tramway 48s class are a class of diesel locomotives built by AE Goodwin, Auburn for the Silverton Tramway in 1960–1961. The State Rail Authority 48 class and South Australian Railways 830 class are of a very similar design.
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