Queensland B18¼ class locomotive

Queensland B18¼ class locomotive

Queensland B18¼ class locomotive number 230
Type and origin
Power type Steam
Builder

North Ipswich Railway Workshops

Walkers Limited
Build date 1926-1947
Total produced 83
Specifications
Configuration 4-6-2
Gauge 3 ft 6 in (1,067 mm)
Driver dia. 51 in (1,300 mm)
Loco weight 56.3 long tons (63.1 short tons; 57.2 t)
Tender weight 36.9 long tons (41.3 short tons; 37.5 t)
Fuel type Coal
Fuel capacity 8 long tons (9.0 short tons; 8.1 t)
Water cap 3,000 imp gal (14,000 l; 3,600 US gal)
Firebox:
 • Firegrate area		 25 sq ft (2.3 m2)
Boiler pressure 170 lbf/in2 (1,172 kPa)
Heating surface 1,957 sq ft (181.8 m2) (as built)
1,923 sq ft (178.7 m2) (1935 reboilering)
1,859 sq ft (172.7 m2) (1936 reboilering)
 • Tubes 1,511 sq ft (140.4 m2) (as built)
1,478 sq ft (137.3 m2) (1935 reboilering)
1,414 sq ft (131.4 m2) (1936 reboilering)
Cylinders Two, outside
Cylinder size 18.25 in × 24 in (464 mm × 610 mm)
Valve gear Walschaerts
Performance figures
Maximum speed 50 mph (80 km/h)
Tractive effort 22,648 lbf (100.7 kN)
Factor of adh. 3.54
Career
Operators Queensland Railways
Class B18¼
Number in class 83
Withdrawn 1967-1970
Preserved 1

The B18¼ class steam locomotive was a 4-6-2 locomotive of the Queensland Railways (QR).[1]

The locomotives operated on 1,067 mm (3 ft 6 in) gauge. The "B", is used to identify the number of coupled wheels, being six coupled wheels for the B18¼ class, followed by numerals indicating the cylinder diameter of 18¼ inches.

83 were built between 1926 and 1947. They were withdrawn between 1967 and 1970. One, No. 771, has been preserved and is in storage at the Workshops Rail Museum.

See also

References

  1. ↑ http://www.qrig.org/motive-power/locomotives/steam/b18-class
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