Queensland DD17 class locomotive

Queensland DD17 class locomotive

Queensland DD17 class number 949
Type and origin
Power type Steam
Designer Cyril Renton
Builder North Ipswich Railway Workshops
Build date 1948-1952
Total produced 12
Specifications
Configuration 4-6-4T
Gauge 3 ft 6 in (1,067 mm)
Driver diameter 4 ft 3 in (1,295 mm)
Loco weight 62 long tons (63 t; 69 short tons)
Boiler pressure 180 psi (1,241 kPa)
Heating surface:
  Firebox
18.5 sq ft (1.72 m2)
Cylinders Two, outside
Cylinder size Diameter: 17 in (432 mm)
Performance figures
Tractive effort 20,808 lb (9,438 kg)
Career
Operators Queensland Railways
Class DD17
Nicknames "Blue Baby" (1049 "Stormin Normin")
Preserved 1046, 1047, 1049, 1051.
Current owner Zig Zag Railway (1046, 1047, 1049) Workshops Rail Museum (1051)
Disposition 1049 and 1051 operational

The DD17 class steam locomotive was a 4-6-4T locomotive of the Queensland Railways (QR).[1]

The locomotives operated on 1,067 mm (3 ft 6 in) gauge. The significance of the first "D" is in line with the QR loco classing system where the letter referred to the number of coupled wheels. "A" refers to 4 coupled driving wheels, "B" to 6, "C" to 8 and "D" to 6 on a tank locomotive. The second "D" indicates an improved version of the earlier D17 class and the number "17" indicates the cylinder diameter of seventeen inches (432 mm). The DD17 class was built to provide more powerful motive power to the Brisbane suburban network.

Numbering

All 12 locomotives were built at North Ipswich Railway Workshops and given works numbers 199-210. Running numbers were 949-954 and 1046-1051.

Preservation

Four are still in existence:

See also

References

External links


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