South African Class GD 2-6-2+2-6-2

Class GD Garratt, circa 1965

Type and origin
Power type	Steam
Designer	Beyer, Peacock and Company
Builder	Beyer, Peacock and Company
Serial number	6263-6266, 6281-6290
Model	Class GD
Build date	1925-1926
Total produced	14

Specifications
Configuration	2-6-2+2-6-2 "Double Prairie" Garratt
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia	28.5 in (724 mm)
Driver diameter	46 in (1,168 mm)
Trailing dia	28.5 in (724 mm)
Wheelbase	Total: 58 ft 4 in (17,780 mm) Engines: 8 ft 6 in (2,591 mm) coupled 18 ft 9 in (5,715 mm) total
Length	65 ft 0.75 in (19,831 mm)
Height	12 ft 10.25 in (3,918 mm)
Frame	Plate frame, 30 ft 6 in (9,296 mm) between pivot centres
Axle load	12.75 long tons (13.0 t) on 6th driver
Adhesive weight	75.35 long tons (76.6 t)
Loco weight	198,900 lb (90.2 t) empty 114.05 long tons (115.9 t) w/o
Fuel type	Coal
Fuel capacity	5 long tons (5.1 t) as built 9 long tons (9.1 t) no. 2220
Water cap	2,300 imp gal (10,000 l) front 1,500 imp gal (6,800 l) rear
Firebox: • Firegrate area	40 sq ft (3.716 m²)
Boiler	6 ft (1,829 mm) inside diameter 10 ft 7.875 in (3,248 mm) inside length 7 ft 9.25 in (2,369 mm) pitch
Boiler pressure	180 psi (1,240 kPa)
Heating surface	1,689 sq ft (156.913 m²)
• Tubes	184 tubes 2 in (51 mm) diameter 32 tubes 5.5 in (140 mm) diameter 1,517 sq ft (140.934 m²)
• Firebox	172 sq ft (15.979 m²)
Superheater: • Heating area	370 sq ft (34.374 m²)
Cylinders	Four
Cylinder size	15 in (381 mm) bore 24 in (610 mm) stroke
Valve gear	Walschaerts

Performance figures
Tractive effort	31,690 lbf (141 kN) at 75% pressure

Career
Operators	South African Railways
Class	Class GD
Number in class	14
Numbers	2220-2223, 2228-2237
Delivered	1925-1926
First run	1925
Withdrawn	1967

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The South African Railways Class GD 2-6-2+2-6-2 of 1925 is an articulated steam locomotive.

In 1925 the South African Railways placed four Class GD Garratt articulated locomotives with a 2-6-2+2-6-2 Double Prairie type wheel arrangement in branchline service. Another ten of these locomotives were delivered in 1926.^[1]^[2]^[3]

Manufacturer

The Class GD 2-6-2+2-6-2 Double Prairie type Garratt locomotive was marginally larger and more powerful than its predecessor Class GC, with a higher axle loading but also intended for branchline work. Four locomotives were delivered by Beyer, Peacock and Company in 1925, numbered in the range from 2220 to 2223. These were followed in 1926 by ten more from the same manufacturer, seven of them built in 1925 and numbered in the range from 2228 to 2234, and the last three built in 1926 and numbered in the range from 2235 to 2237.^[1]^[2]^[3]^[4]

They were superheated and had plate frames, Belpaire fireboxes and Walschaerts valve gear.^[2]^[3]

Service

They were placed in service on the North Coast and the Pietermaritzburg to Franklin lines in Natal and on the line from Cape Town across Sir Lowry’s Pass to Caledon in the Overberg. The Class GD proved itself as handy and trouble-free locomotives and gave good service for more than forty years.^[1]

They were later allocated to the Cape Midland system to work across the Montagu Pass between George and Oudtshoorn for many years, until they were finally all allocated to the Port Alfred branch, where they remained until they were withdrawn from service in 1967.^[3]

Illustration

The main picture and the following photograph offer views of both sides of the Class GD locomotive.

Class GD no. 2222 on the down Caledon goods from Cape Town, circa 1940

References

1 2 3 Holland, D.F. (1972). Steam Locomotives of the South African Railways, Volume 2: 1910-1955 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 47–48. ISBN 978-0-7153-5427-8.
1 2 3 South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended
1 2 3 4 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. p. 90. ISBN 0869772112.
↑ Hamilton, Gavin N., The Garratt Locomotive - Garratt Locomotives produced by Beyer, Peacock, retrieved 10 November 2012

Wikimedia Commons has media related to South African Class GD (2-6-2+2-6-2).

Locomotives of South Africa

Steam

7' ¼" gauge	East London Harbour 0-4-0 Table Bay Harbour 0-4-0ST Table Bay Harbour 0-4-0T Table Bay Harbour 0-4-0WT

4' 8½" gauge	Cape 0-4-0T Blackie Cape 0-4-2 Cape 2-4-0T CGR 0-4-0ST Aid Natal 0-4-0ST Durban Natal 0-4-0WT Natal Natal 4-4-0T Perseverance

3' 6" gauge Tank engines	CGR 0-4-0ST 1873 CGR 0-4-0ST 1874 CGR 0-4-0ST 1881 Coffee Pot CGR 0-6-0ST 1902 CGR 0-6-0T 1876 Back-to-Back CGR 2-6-0ST 1900 CGR 2-6-0ST 1902 CGR 1st Class 0-4-0ST 1875 CGR 1st Class 0-4-0ST 1876 CGR 1st Class 2-6-0ST 1876 CGR 1st Class 4-4-0T 1875 CGR 2nd Class 4-4-0T 1882 CGR 3rd Class 2-6-0T CGR Railmotor CSAR Class C CSAR Class E CSAR Rack CSAR Railmotor DSWA Eight-Coupled Tank 2-8-0T Durban's Congella Durban's Edward Innes Durban's John Milne Durban's Sir Albert Port Elizabeth Harbour 0-4-0ST Kowie Railway 0-6-0T Kowie Railway 4-4-0T Metropolitan & Suburban 4-6-2T NGR 2-6-0T Durban & Pietermaritzburg NGR Class I 2-6-2T NGR Class K 0-4-0ST NGR Class K 0-6-0ST NGR Class K 2-6-0T NZASM 10 Tonner NZASM 14 Tonner NZASM 18 Tonner NZASM 19 Tonner NZASM 32 Tonner NZASM 40 Tonner PPR 26 Tonner PPR 35 Tonner Portuguese SAR 0-4-0ST 1903 SAR 0-4-0T no. 69 SAR Class A SAR Class B SAR Class C SAR Class C1 SAR Class C2 SAR Class D SAR Class E SAR Class F SAR Class G SAR Class H SAR Class H1 SAR Class H2 SAR Class J SAR Class K SAR Clayton Railmotor

3' 6" gauge Tender engines	CGR 1st Class 2-6-0 1876 Beyer, Peacock CGR 1st Class 2-6-0 1876 Kitson CGR 1st Class 2-6-0 1879 CGR 1st Class 2-6-0 1891 CGR 1st Class 4-4-0 1879 CGR 1st Class 4-4-0TT 1881 CGR 2nd Class 2-6-2TT 1875 CGR 3rd Class 4-4-0 1883 CGR 3rd Class 4-4-0 1884 CGR 3rd Class 4-4-0 1889 CGR 3rd Class 4-4-0 1898 CGR 3rd Class 4-4-0 1901 CGR 3rd Class 4-4-0 1903 CGR 4th Class 4-4-2 CGR 4th Class 4-6-0TT 1880 CGR 4th Class 4-6-0TT 1882 CGR 4th Class 4-6-0TT 1884 CGR 5th Class 4-6-0 1890 CGR 5th Class 4-6-0 1891 DSWA Eight-Coupled Tender 2-8-0 NGR Havelock NGR Class I SAR Class Exp 1 SAR Class Exp 2 SAR Class Exp 3 SAR Class Exp 4 SAR Class Exp 5 SAR Class Exp 6 SAR Class S SAR Class S1 SAR Class S2 SAR Class 1 SAR Class 1A SAR Class 1B SAR Class 2 SAR Class 2C SAR Class 3 SAR Class 3A SAR Class 3B SAR Class 4 SAR Class 4A SAR Class 5 SAR Class 5A SAR Class 5B SAR Class 6 SAR Class 6A SAR Class 6B SAR Class 6C SAR Class 6D SAR Class 6E SAR Class 6F SAR Class 6G SAR Class 6H SAR Class 6J SAR Class 6K SAR Class 6L SAR Class 6Y SAR Class 6Z SAR Class 7 SAR Class 7A SAR Class 7B SAR Class 7C SAR Class 7D SAR Class 7E SAR Class 7F SAR Class 8 SAR Class 8A SAR Class 8B SAR Class 8C SAR Class 8D SAR Class 8E SAR Class 8F SAR Class 8R SAR Class 8X SAR Class 8Y SAR Class 8Z SAR Class 9 SAR Class 10 SAR Class 10A SAR Class 10B SAR Class 10C SAR Class 10D SAR Class 11 SAR Class 12 SAR Class 12A SAR Class 12B SAR Class 13 SAR Class 14 SAR Class 14A SAR Class 14B SAR Class 14C SAR Class 15 SAR Class 15A SAR Class 15B SAR Class 15C SAR Class 15CA SAR Class 15E SAR Class 15F SAR Class 16 SAR Class 16A SAR Class 16B SAR Class 16C SAR Class 16D SAR Class 16DA SAR Class 16E SAR Class 17 SAR Class 18 SAR Class 19 SAR Class 19A SAR Class 19B SAR Class 19C SAR Class 19D SAR Class 20 SAR Class 21 SAR Class 23 SAR Class 24 SAR Class 25 SAR Class 25NC SAR Class 26 Red Devil

3' 6" gauge Articulated engines	CGR Fairlie CGR Kitson-Meyer SAR Class FC SAR Class FD SAR Class GA SAR Class GB SAR Class GC SAR Class GCA SAR Class GD SAR Class GDA SAR Class GE SAR Class GEA SAR Class GF SAR Class GG SAR Class GH SAR Class GK SAR Class GL SAR Class GM SAR Class GMA SAR Class GO SAR Class HF SAR Class KM SAR Class MA SAR Class MB SAR Class MC SAR Class MC1 SAR Class MD SAR Class ME SAR Class MF SAR Class MG SAR Class MH SAR Class MJ SAR Class MJ1 SAR Class U

2' 6" gauge	Cape Copper 0-6-0T 1871 Cape Copper Britannia Cape Copper Caledonia Cape Copper Clara Class Cape Copper Condenser Cape Copper Scotia Class Namaqua Copper Pioneer

2' & 600mm gauges	ACR Class NG-G16A CGR NG 0-6-0T CGR NG 4-6-2T CGR Type A 2-6-4T CGR Type C 0-4-0T DSWA Class Ha DSWA Class Hb DSWA Class Hc DSWA Class Hd DSWA Jung DSWA Zwillinge NGR Class N 4-6-2T SAR NG 0-4-0T 1899 SAR Class NG1 SAR Class NG2 SAR Class NG3 SAR Class NG4 SAR Class NG5 SAR Class NG6 SAR Class NG7 SAR Class NG8 SAR Class NG9 SAR Class NG10 SAR Class NG-G11 SAR Class NG-G12 SAR Class NG-G13 SAR Class NG-G14 SAR Class NG15 SAR Class NG-G16

Electric

Amcoal Class E38

Diesel

3' 6" gauge Diesel-electric	PRASA Class Afro 4000 SAR Class DS SAR Class DS1 SAR Class 31-000 SAR Class 32-000 SAR Class 32-200 SAR Class 33-000 SAR Class 33-200 SAR Class 33-400 SAR Class 34-000 SAR Class 34-200 SAR Class 34-400 SAR Class 34-500 SAR Class 34-600 SAR Class 34-800 SAR Class 34-900 SAR Class 35-000 SAR Class 35-200 SAR Class 35-400 SAR Class 35-600 SAR Class 36-000 SAR Class 36-200 SAR Class 37-000 Spoornet Class 39-000 TFR Class 35-800 TFR Class 39-200 TFR Class 43-000 TFR Class 44-000

2' gauge Diesel-electric	SAR Class 91-000

3' 6" gauge Diesel-hydraulic	SAR Class 61-000

3' 6" gauge Electro-diesel	Spoornet Class 38-000

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