Queensland 4D10 class locomotive

Queensland Railways 4D10 class
Type and origin Power type Steam Builder North Ipswich Railway Workshops Serial number 4-6 Build date 1884/85
Specifications Configuration: ​  • Whyte 2-4-2T Gauge 1,067 mm (3 ft 6 in) Axle load 11.5t Loco weight 24.1t Total weight 24.1t Fuel type Coal Fuel capacity 1.5 tonnes Water cap. 550 gallons Tender cap. 3 tonnes Boiler NIRW Boiler pressure 120psi Heating surface: ​  • Firebox 7.1 square feet Cylinders 2 outside Cylinder size 10 in × 18 in (254 mm × 457 mm)
Career Operators Queensland Railways Numbers 6, 9-11, 72-74 Delivered 1884 First run 1884 Last run 1902 Retired 1902 Withdrawn 1902 Preserved 10 (Boiler Only) Scrapped 1903 Disposition all scrapped, 10's boiler is at Caboolture[1]

The Queensland Railways 4D10 class locomotive was a class of 2-4-2T steam locomotives operated by the Queensland Railways.

In September 1877, a Select Committee recommended no more locomotives be built in the colony. However some materials had already been purchased for proposed new locomotives. In 1884/85 these were put to use to build four 2-4-2T locomotives at North Ipswich Railway Workshops. Per Queensland Railway's classification system they were designated the 4D10 class in 1890, the 4 representing the number of driving wheels, the D that it was a tank locomotive, and the 10 the cylinder diameter in inches.^[2] A further four A10 Neilson class were converted to 4D10s.^[3]