Tasmanian Government Railways X class

Specifications
Specifications
Configuration:;
• Commonwealth	Bo-Bo
Gauge	1,067 mm (3 ft 6 in)
Wheel diameter	3 ft 0+1⁄2 in (0.927 m)
Minimum curve	264 ft (80.467 m)
Wheelbase	24 ft 9 in (7.544 m) total, 8 ft 3 in (2.515 m) bogie
Length	34 ft (10.363 m) over headstocks
Width	9 ft 5+1⁄2 in (2.883 m)
Height	12 ft 5 in (3.785 m)
Axle load	14+1⁄4 long tons (14.5 t; 16.0 short tons)
Loco weight	57 long tons (57.9 t; 63.8 short tons)
Fuel type	Diesel
Fuel capacity	340 imp gal (1,500 L)
Prime mover	English Electric 6SRKT Mark I
RPM range	450–750 rpm
Engine type	Inline four stroke, two valves per cylinder
Aspiration	turbocharged
Generator	EE827A
Traction motors	Four EE521B
Cylinders	6
Cylinder size	10 in × 12 in (254 mm × 305 mm)
Transmission	Electrical
MU working	90V, 9 notch electro-magnetic control
Loco brake	Air
Train brakes	Vacuum

Type and origin
Type and origin
Power type	Diesel-electric
Builder	English Electric Dick Kerr, Vulcan Foundry
Serial number	1796–1805 (VF D88–D97); 1811–1820 (VF D105–D114); 1821–1832
Build date	1950–1952
Total produced	32

Tasmanian Government Railways X class
Tasmanian Government Railways X class
	Preserved X1 at the Tasmanian Transport Museum in August 2011
Power type
Type and origin
Power type	Diesel-electric
Builder	English Electric Dick Kerr, Vulcan Foundry
Serial number	1796–1805 (VF D88–D97); 1811–1820 (VF D105–D114); 1821–1832
Build date	1950–1952
Total produced	32
Configuration:;
Specifications
Configuration:;
• Commonwealth	Bo-Bo
Gauge	1,067 mm (3 ft 6 in)
Wheel diameter	3 ft 0+1⁄2 in (0.927 m)
Minimum curve	264 ft (80.467 m)
Wheelbase	24 ft 9 in (7.544 m) total, 8 ft 3 in (2.515 m) bogie
Length	34 ft (10.363 m) over headstocks
Width	9 ft 5+1⁄2 in (2.883 m)
Height	12 ft 5 in (3.785 m)
Axle load	14+1⁄4 long tons (14.5 t; 16.0 short tons)
Loco weight	57 long tons (57.9 t; 63.8 short tons)
Fuel type	Diesel
Fuel capacity	340 imp gal (1,500 L)
Prime mover	English Electric 6SRKT Mark I
RPM range	450–750 rpm
Engine type	Inline four stroke, two valves per cylinder
Aspiration	turbocharged
Generator	EE827A
Traction motors	Four EE521B
Cylinders	6
Cylinder size	10 in × 12 in (254 mm × 305 mm)
Transmission	Electrical
MU working	90V, 9 notch electro-magnetic control
Loco brake	Air
Train brakes	Vacuum
Maximum speed
Performance figures
Maximum speed	55 miles per hour (89 km/h)
Power output	660 hp (490 kW) gross, 600 hp (450 kW) net
Tractive effort:;
• Starting	33,500 lbf (149.0 kN)
• Continuous	12,000 lbf (53.4 kN) at 16 miles per hour (26 km/h)
Operators
Career
Operators	Tasmanian Government Railways
Number in class	32
Numbers	X1-X32
First run	September 1950
Last run	August 1988
Preserved	X1, X3, X4, X10, X18, X20, X30
Disposition	7 preserved, 25 scrapped

The X class is a class of diesel locomotives built by English Electric for the Tasmanian Government Railways between 1950 and 1952. They were the first class of diesel locomotive to enter mainline service on a Government-owned railway in Australia.