Queensland Beyer-Garratt class

The Queensland Railways Beyer-Garratt class locomotive was a class of 4-8-2+2-8-4 steam locomotives operated by the Queensland Railways.

Queensland Railways Beyer-Garratt class
1009 in storage at North Ipswich Railway Workshops
Type and origin Power type Steam Builder Beyer, Peacock & Company (10) Société Franco-Belge (20) Build date 1950-1951 Total produced 30
Specifications Configuration: ​  • Whyte 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: ​  • Grate 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

Overview

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 proposed air-conditioned trains that were being designed at the time. This never eventuated, although they did regularly haul The Midlander, mainly between Emerald and Bogantungan for some years. They were used on the Rockhampton Mail and Sunshine Express in the early 1950s.

Builders

The first 10 engines were constructed by Beyer, Peacock & Company, Manchester. Owing to a full order book the company subcontracted the remaining 20 to Société Franco-Belge, Raismes, France.

Livery

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.

Service

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.

A few were based at Mayne until 1955 and some at North Bundaberg until 1956, when all were allocated to Rockhampton. In later years they worked Moura coal trains via Mount Morgan, prior to the opening of the short line to Gladstone. One of their last regular tasks was on limestone trains between Tarcoola and Gladstone. Increasing numbers of diesels saw mass withdrawals of these engines. Twenty-two were written off in June 1968.

Advantages and disadvantages

They were subject to much positive publicity when introduced but failed to live up to all expectations. They were attributed with saving 19,500 miles of assistant and goods engine running on the Bundaberg – Rockhampton – Emerald sections between October 1950 and June 1951. Steaming difficulties were encountered with South Queensland coals; however they performed well on Blair Athol coal. The boilers had a tendency to prime. Limited coal and water capacity caused worries. General overhauls cost about three times those for a B18¼ class.

Features

They had a number of unique features (for QR steam engines) including Ajax air operated butterfly fire doors, Hadfield power reverse gear, speedometers and also flow meters; the latter being fitted to the class in 1955. The outer bogies and inner trucks had roller bearings but the coupled axles have plain bearings. Several engines received fabricated stove pipe chimneys to replace the original cast ones that had been damaged.

Preservation

No. 1009 was preserved as a static exhibit at the Redbank Locomotive Museum, was taken into North Ipswich Railway Workshops in 1993 and restored to working order. Subsequently, due to a leaking fusible plug, it was taken out of service. Overhaul of the locomotive subsequently started but was halted due to costs. In August 2020, it was announced by the Workshops Rail Museum that 1009 has been lent by Queensland Rail to become a permanent exhibition at the museum.

Bibliography

• Queensland Railways (1950). The Beyer-Garratt Locomotive operating manual. A.H. Tucker, Government Printer. Retrieved 13 August 2015.

External links

Media related to Queensland Beyer-Garratt class at Wikimedia Commons