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 m^2) Boiler pressure 170 lbf/in^2 (1,172 kPa) Heating surface 1,957 sq ft (181.8 m^2) (as built) 1,923 sq ft (178.7 m^2) (1935 reboilering) 1,859 sq ft (172.7 m^2) (1936 reboilering)  • Tubes 1,511 sq ft (140.4 m^2) (as built) 1,478 sq ft (137.3 m^2) (1935 reboilering) 1,414 sq ft (131.4 m^2) (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Career Operators Queensland Railways Class B18¼ Number in class 83 Withdrawn 1967-1970 Preserved 1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 They were withdrawn between 1967 and 1970.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

• List of Queensland steam locomotives
• Rail transport in Queensland

References

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