Queensland Beyer-Garratt class
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| Type and origin | |
|---|---|
| Power type | Steam |
| Builder |
Beyer, Peacock & Co (10) Société Franco-Belge (20) |
| Build date | 1950/51 |
| Total produced | 30 |
| Specifications | |
|---|---|
| Configuration | 4-8-2+2-8-4 |
| Gauge | 1,067 mm (3 ft 6 in) |
| Driver dia. | 4 ft 3 in (1,295 mm) |
| Length | 90 ft (27.43 m) |
| Adhesive weight | 76.9 long tons (78.1 t; 86.1 short tons) |
| Loco weight | 137 long tons (139.2 t; 153.4 short tons) |
| Fuel type | Coal |
| Fuel capacity | 6 long tons (6.1 t; 6.7 short tons) |
| Water cap | 3,800 imp gal (17,280 l) |
| Firebox: • Firegrate area |
39 sq ft (3.6 m2) |
| Boiler pressure | 200 psi (1,379 kPa) |
| Heating surface: • Tubes and flues |
1,670 sq ft (155 m2) |
| Superheater: |
|
| • Heating area | 455 sq ft (42.3 m2) |
| Cylinders | 4 outside |
| Cylinder size | 13 3⁄4 in × 26 in (349 mm × 660 mm) |
| Performance figures | |
|---|---|
| Tractive effort | 32,770 lbf (145.77 kN) |
| Career | |
|---|---|
| Operators | Queensland Railways |
| Numbers | 1001-1010, 1090-1109 |
| Preserved | 1009 |
| Disposition | 1 preserved, 29 scrapped |
The Queensland Railways Beyer-Garratt class locomotive was a class of 4-8-2+2-8-4 steam locomotives operated by the Queensland Railways.
A Garratt (also known as Beyer-Garratt) is a type of steam locomotive that is articulated in three parts. Its boiler is mounted on the centre frame, and two steam engines are mounted on separate frames, one on each end of the boiler. Articulation permits larger locomotives to negotiate curves and lighter rails that might restrict large rigid-framed locomotives. Many Garratt designs aimed to double the power of the largest conventional locomotives operating on their railways, thus reducing the need for multiple locomotives and crews.
The initial plan had been to use these engines on the trains that were being designed at the time. This never eventuated, although they did regularly haul the The Midlander, mainly between Emerald and Bogantungan for some years. They were used on the Rockhampton Mail and Sunshine Express in the early 1950s.
The first ten engines were constructed by Beyer Peacock, & Co, Manchester. Owing to a full order book, Beyer Peacock subcontracted the construction of the final 20 to Societe Franco Belge de Materiel du Chemins de fer, Raismes, France to build the remaining twenty.
All were painted Midland red and had chrome yellow lining with large QR monograms on the sides of the front tank and bunker. Unfortunately this attractive livery easily discoloured particularly as a result of priming. The engines were not regularly cleaned when relegated to goods train working in latter years and their appearance rapidly deteriorated.
Originally trialled on the Brisbane to Toowoomba line, they were soon withdrawn from this section due to problems with limited clearances in the tunnels. They were used extensively on North Coast Line between Brisbane and Rockhampton. By 1956, this working had become restricted to mainly north of Bundaberg. They did not work north of St Lawrence on the North Coast Line. On the Central West Line they initially ran between Rockhampton and Emerald, and from 1957 their range was extended to Bogantungan.
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Wikipedia