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Queensland D17 class locomotive

Queensland Railways D17 class
Type and origin
Power type Steam
Builder Walkers Limited (10)
North Ipswich Railway Workshops (20)
Build date 1924-1942
Total produced 30
Specifications
Configuration:
 • Whyte 4-6-4T
Gauge 1,067 mm (3 ft 6 in)
Driver dia. 4 ft 3 in (1,295 mm)
Fuel type Coal
Fuel capacity 3 t (3.0 long tons; 3.3 short tons)
Water cap 1,200 imp gal (5,500 l; 1,400 US gal)
Boiler pressure 160 or 170 lbf/in2 (1,103 or 1,172 kPa)
Cylinders 2
Cylinder size 17 in × 22 in (432 mm × 559 mm)
Valve gear Walschaerts
Performance figures
Tractive effort 16,940 or 18,000 lbf (75.35 or 80.07 kN)
Career
Operators Queensland Railways
Numbers 26, 47, 53, 56, 60, 75-77, 85, 112-114, 122, 137, 260, 262, 266-269, 853-857, 882-886
Preserved 268, 855
Disposition 2 preserved, 28 scrapped
Type and origin
Power type Steam
Builder Walkers Limited (10)
North Ipswich Railway Workshops (20)
Build date 1924-1942
Total produced 30
Specifications
Configuration:
 • Whyte 4-6-4T
Gauge 1,067 mm (3 ft 6 in)
Driver dia. 4 ft 3 in (1,295 mm)
Fuel type Coal
Fuel capacity 3 t (3.0 long tons; 3.3 short tons)
Water cap 1,200 imp gal (5,500 l; 1,400 US gal)
Boiler pressure 160 or 170 lbf/in2 (1,103 or 1,172 kPa)
Cylinders 2
Cylinder size 17 in × 22 in (432 mm × 559 mm)
Valve gear Walschaerts
Performance figures
Tractive effort 16,940 or 18,000 lbf (75.35 or 80.07 kN)
Career
Operators Queensland Railways
Numbers 26, 47, 53, 56, 60, 75-77, 85, 112-114, 122, 137, 260, 262, 266-269, 853-857, 882-886
Preserved 268, 855
Disposition 2 preserved, 28 scrapped

The Queensland Railways D17 class locomotive was a class of 4-6-4T steam locomotives operated by the Queensland Railways.

Between 1924 and 1926, Walkers Limited and North Ipswich Railway Workshops each built 10 to assist the 6D16 class with increasing suburban traffic. Between 1937 and 1942 a further 10 were built at Ipswich. Per Queensland Railway's classification system they were designated the D17 class, D representing they were a tank locomotive, and the 17 the cylinder diameter in inches.

They were the only Queensland Railways class to be fitted as a whole, from new, with two sand-domes. They were restricted to the Brisbane suburban area with boundaries of Ipswich, Ferny Grove, Pinkenba, Shorncliffe, Petrie, Kingston and Lota. This area was later extended beyond Ipswich to Grandchester. Initially, all were attached to Mayne depot but later several were transferred to Woolloongabba.

Cylinder and steam chest castings are identical to C17 Class. The ‘6’ was dropped from the classification in 1937. The engines were often unofficially referred to as ‘black tanks’ after the introduction of the DD17 class. Engines constructed in 1937 had boilers with a pressure of 170 pounds-force per square inch (1,172 kPa). Earlier engines were altered to that pressure as they passed through workshops. A wooden crate was fixed to the centre of the bunker to slightly increase the coal capacity from the original 3 long tons (3.0 t; 3.4 short tons).


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