2-4-2+2-4-2

2-4-2+2-4-2

Equivalent classifications
UIC class	1B1+1B1, 1’B1’+1’B1’
French class	121+121
Turkish class	24+24
Swiss class	2/4+2/4, 4/8 from the 1920s
Russian class	1-2-1+1-2-1

First known tank engine version
First use	1943
Country	Brazil
Railway	Leopoldina Railway
Designer	Beyer, Peacock and Company
Builder	Beyer, Peacock and Company
Evolved from	2-4-0+0-4-2

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 2-4-2+2-4-2 is a Garratt locomotive. The wheel arrangement is effectively two 2-4-2 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 two coupled pairs of driving wheels, with a single pair of trailing wheels in a trailing truck.

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Transcription

Overview

This was the rarest of all Garratt types, with only one class of four locomotives constructed to this wheel arrangement.^[1] It most likely evolved from the 2-4-0+0-4-2 Double Porter Garratt, with the trailing wheels added on each engine unit to improve stability at speed.

**2-4-2+2-4-2 Garratt production list – All manufacturers**^[1]
Gauge	Railway	Numbers	Works no.	Units	Year	Builder
1,000 mm (3 ft 3+3⁄8 in) metre gauge	Leopoldina Railway, Brazil	400-403	6976-6979	4	1943	Beyer, Peacock

Usage

Brazil

All four 2-4-2+2-4-2 locomotives were built in 1943 by Beyer, Peacock and Company for the 1,000 mm (3 ft 3+3⁄8 in) metre gauge Leopoldina Railway in Brazil. The locomotives were allocated engine numbers in the range from 400 to 403 on that system.^[1]

References

Wikimedia Commons has media related to 2-4-2+2-4-2 locomotives.

^ ^a ^b ^c Hamilton, Gavin N., The Garratt Locomotive - Garratt Locomotives produced by Beyer, Peacock, retrieved 10 November 2012

v t e Steam locomotive wheel arrangements (Whyte notation)
Single engine types	0-2-2 0-2-4 2-2-0 2-2-2 2-2-4 4-2-0 4-2-2 4-2-4 6-2-0 0-3-0 (monorail) 0-4-0 0-4-0+4 0-4-2 0-4-4 0-4-6 2-4-0 2-4-2 2-4-4 2-4-6 4-4-0 4-4-2 4-4-4 4-4-6 0-6-0 0-6-2 0-6-4 0-6-6 2-6-0 2-6-2 2-6-4 2-6-6 4-6-0 4-6-2 4-6-4 0-8-0 0-8-2 0-8-4 0-8-6 2-8-0 2-8-2 2-8-4 2-8-6 4-8-0 4-8-2 4-8-4 4-8-6 6-8-6 0-10-0 0-10-2 2-10-0 2-10-2 2-10-4 4-10-0 4-10-2 0-12-0 2-12-0 2-12-2 2-12-4 4-12-2 4-14-4
Divided drive and Duplex engine types	0-2-2-0 2-2-2-0 2-2-2-2 2-2-4-0 4-2-2-0 2-4-6-2 4-4-4-4 6-4-4-6 4-4-6-4 4-6-4-4
Articulated locomotives Fairlie, Meyer and Garratt types	0-4-0+0-4-0 2-4-0+0-4-2 2-4-2+2-4-2 4-4-2+2-4-4 0-6-0+0-6-0 0-6-2+2-6-0 2-6-0+0-6-2 2-6-2+2-6-2 4-6-0+0-6-4 4-6-2+2-6-4 4-6-4+4-6-4 2-8-0+0-8-2 2-8-2+2-8-2 4-8-0+0-8-4 4-8-2+2-8-4 4-8-4+4-8-4
Articulated locomotives Mallet types	0-4-4-0 0-4-4-2 2-4-4-0 2-4-4-2 0-6-6-0 2-6-6-0 2-6-6-2 2-6-6-4 2-6-6-6 2-6-8-0 4-4-6-2 4-6-6-2 4-6-6-4 0-8-6-0 0-8-8-0 2-8-8-0 2-8-8-2 2-8-8-4 4-8-8-2 4-8-8-4 2-10-10-2
Articulated locomotives Triplex and other Multiplex types	2-8-8-8-2 2-8-8-8-4 2-8-8-8-8-2 0-6-2+2-4-2-4-2+2-6-0 2-6-6-2+2-6-6-2 2-8-8-8-8-8-2 2-10-10-10-10-10-2 2-4-4-2+2-8-8-2+2-4-4-2
Articulated locomotives Engerth types	0-4-4 0-4-6 2-6-2 0-6-4 0-6-4-0 0-8-4 0-8-6
Geared locomotives	Shay Climax Heisler Willamette
Other notation forms: AAR Swiss UIC

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This page was last edited on 3 November 2023, at 15:38

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