2-8-0+0-8-2

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 2-8-0+0-8-2 is a Garratt articulated locomotive. The wheel arrangement is effectively two 2-8-0 locomotives operating back to back, with the boiler and cab suspended between the two power units. Each power unit has a single pair of leading wheels in a leading truck, followed by four coupled pairs of driving wheels and no trailing wheels. Since the 2-8-0 type is sometimes known as a Consolidation, the corresponding Garratt type could be referred to as a Double Consolidation.

2-8-0+0-8-2 (Double Consolidation)
The LNER's sole Class U1 Garratt
Equivalent classifications
UIC class1D+D1, 1'D+D1'
French class140+041
Turkish class45+45
Swiss class4/5+4/5, 8/10 from 1920s
Russian class1-4-0+0-4-1
First known tank engine version
First use1924
CountryBurma
LocomotiveClass GA.I
RailwayBurma Railways
DesignerBeyer, Peacock and Company
BuilderBeyer, Peacock and Company

A similar wheel arrangement exists for Mallet type locomotives, but is referred to as 2-8-8-2.

Overview

This Garratt wheel arrangement was somewhat common, especially for locomotives intended for freight service. The first 2-8-0+0-8-2 locomotive was a single metre gauge locomotive built by Beyer Peacock in 1924 for the Burma Railways as their class GA.I. The second, and perhaps the better known, was the single Class U1 of the London and North Eastern Railway (LNER), built in 1925.[1][2][3]

Usage

Burma

Apart from their first single class GA.I locomotive of 1924, the 1,000 mm (3 ft 3 3⁄8 in) metre gauge Burma Railways acquired another locomotive from Beyer, Peacock in 1927, classifying it GA.II. In that same year, another four of class GA.III were placed in service, also from Beyer, Peacock. In 1929, Krupp of Essen in Germany delivered eight more, designated Class GA.IV.[1][4]

India

The 5 ft 6 in (1,676 mm) Bengal Nagpur Railway in India used two of the class HSG, built by Beyer, Peacock in 1925.

Ten 1,000 mm (3 ft 3 3⁄8 in) metre gauge examples were purchased by the British War Department in 1943 and used on the Bengal Assam Railway in India as their Class MWGX.[1]

Mauritius
Mauritius Railway no. 60

The Mauritius Railway owned three 4 ft 8 1⁄2 in (1,435 mm) standard gauge 2-8-0+0-8-2 Garratts, also built by Beyer, Peacock in 1927.[1]

Turkey

The Ottoman Railways in Turkey acquired a single 4 ft 8 1⁄2 in (1,435 mm) standard gauge 2-8-0+0-8-2 Garratt from Beyer, Peacock in 1927.[1]

United Kingdom
Class U1 on the Lickey Incline, 1949

The London and North Eastern Railway (LNER) owned a single Class U1 Garratt, built by Beyer, Peacock in 1925. It was designed by Nigel Gresley for banking coal trains over the Worsborough Bank, a steeply graded line in South Yorkshire and part of the Woodhead Route. The Class U1 was both the longest and the most powerful steam locomotive ever to run in the United Kingdom.[1][2][3]

References
  1. Hamilton, Gavin N., The Garratt Locomotive - Garratt Locomotives produced by Beyer, Peacock, retrieved 10 November 2012
  2. "The Woodhead Site - The Locomotives - LNER Beyer-Garratt". www.thewoodheadsite.org.uk. Archived from the original on 2007-09-27. Retrieved 3 October 2008.
  3. Marsden, Richard. "The U1 Garratt ('The Wath Banker')". The LNER Encyclopaedia. Retrieved 3 October 2008.
  4. Hamilton, Gavin N., The Garratt Locomotive - Garratt Locomotives from Other Builders, retrieved 10 November 2012
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