Queensland AC16 class locomotive
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| Type and origin | |
|---|---|
| Power type | Steam |
| Builder | Baldwin Locomotive Works |
| Serial number | 69451-69470 |
| Model | USATC S118 Class |
| Build date | 1943 |
| Total produced | 20 |
| Specifications | |
|---|---|
| Configuration | 2-8-2 |
| Gauge | 1,067 mm (3 ft 6 in) |
| Leading dia. | 2 ft 2 in (660 mm) |
| Driver dia. | 4 ft 0 in (1,219 mm) |
| Trailing dia. | 2 ft 6 in (762 mm) |
| Length | 59 ft 5 1⁄2 in (18.12 m) |
| Adhesive weight | 80,000 lb (36,300 kg) |
| Loco weight | 119,000 lb (54,000 kg) |
| Fuel type | Coal |
| Firebox: • Firegrate area |
27.7 sq ft (2.57 m2) |
| Boiler pressure | 185 lbf/in2 (1,276 kPa) |
| Heating surface: • Tubes and flues |
1,256 sq ft (116.7 m2) |
| • Firebox | 115 sq ft (10.7 m2) |
| Superheater: |
|
| • Heating area | 347 sq ft (32.2 m2) |
| Cylinders | 2 outside |
| Cylinder size | 16 in × 24 in (406 mm × 610 mm) |
| Valve gear | Walschaerts |
| Performance figures | |
|---|---|
| Tractive effort | 20,128 lbf (89.53 kN) |
| Career | |
|---|---|
| Operators | Queensland Railways |
| Numbers | 216A-235A |
| Nicknames | Yank |
| Preserved | 218A, 221A |
| Disposition | 2 preserved, 18 scrapped |
The Queensland Railways AC16 class locomotive was a class of 2-8-2 steam locomotives operated by the Queensland Railways.
World War II and the occupation by Japanese forces of Pacific Islands and islands to the north of Australia saw Queensland placed under the threat of imminent attack. This placed a great strain on Queensland Railway’s resources in the movement of wartime supplies and troops.
A request was made in 1941 for further, new C17 class locomotives and the specifications were forwarded to the United States where the United States Army Transportation Corps (USATC) drew up plans for a 2-8-2 with specifications similar to a C17 class. The locomotives are also known is United States of America as USATC S118 Class steam locomotives. These locomotives were intended as a standard design for use on narrow gauge railways in other parts of the world as a wartime measure. Thus twenty engines obtained from the United States under Lend-Lease arrangements and later purchased. They were the only ones of their type to come to Australia out of a total of 741 similar engines built for USATC. They were unloaded in Sydney in 1943 and railed to Brisbane for assembly.
Per Queensland Railway's classification system they were designated the AC16 class, C representing they had four driving axles, and the 16 the cylinder diameter in inches. Because the classification was already being used by an existing class they were designated American C16, i.e. AC16. The American steam locomotive earned it the nickname of Yank. The engines entered traffic with their US Army road numbers but had "A" appended to differentiate them from existing engines with the same numbers.
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