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South African Class DS1

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Class of 1 South African 0-6-0de locomotive

South African Class DS1

No. D138, c. 1940

Type and origin
Power type	Diesel-electric
Designer	Allgemeine Elektricitäts-Gesellschaft
Builder	Allgemeine Elektricitäts-Gesellschaft
Serial number	AEG 5062/1939 (ESKOM locomotive)
Model	SAR DS1
Build date	1939
Total produced	2

Specifications
Configuration:
• Whyte	6w DE
• AAR	C
• UIC	Co
• Commonwealth	Co
Gauge	3 ft 6 in (1,067 mm)Cape gauge
Wheel diameter	42 in (1,067 mm)
Wheelbase	11 ft 4 in (3,454 mm)
Length:
• Over couplers	30 ft8+1⁄2 in (9,360 mm)
• Over beams	27 ft10+1⁄2 in (8,496 mm)
Height	12 ft6+3⁄4 in (3,829 mm)
Axle load	14 LT 7 cwt (14,580 kg)
Loco weight	40 LT 13 cwt (41.3 t)
Fuel type	Diesel
Fuel capacity	289 imp gal (1,310 L)
Prime mover	MAN 265 hp (198 kW)
Generator	AEG 110 kW (150 hp) main AEG 12 kW (16 hp) auxiliary
Traction motors	Three AEG
Cylinders	Eight
Gear ratio	5.67:1
Couplers	AAR knuckle Johnston link-and-pin (1956)

Performance figures
Power output	265 hp (198 kW)
Tractive effort:
• Starting	17,600 lbf (78 kN)
Factor of adh.	5•15

Career
Operators	South African Railways ESKOM
Class	Class DS1
Number in class	1 SAR, 1 ESKOM
Numbers	D138, renumbered D514
Official name	Citelec (ESKOM)
Delivered	1939
First run	1939

TheSouth African Railways Class DS1 of 1939 was a diesel-electric locomotive.

The second diesel-electric locomotive on the South African Railways was a single Class DS1AEG diesel-electricshunting locomotive which was placed in service in 1939. Two of these locomotives were delivered to South Africa, one for the Railways and another for the Electricity Supply Commission.^[1]^[2]

Manufacturer

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As a result of the problems experienced in obtaining adequate water supplies in the arid regions of South Africa andSouth West Africa, particularly on the section betweenDe Aar in theKaroo viaUpington toKeetmanshoop, the South African Railways (SAR) decided to experiment with diesel-powered traction and introduced its first two diesel-electric shunting locomotives in 1939.^[1]^[2]

The second of these was a single six-wheeled locomotive of which two units were ordered fromAllgemeine Elektricitäts-Gesellschaft (AEG) in Berlin at the same time as the singleClass DS locomotive.^[1]^[2]

Only one of them entered service on the SAR and was designated Class DS1. It was initially numbered D138, but it was soon renumbered to D514. Both numbers were actually in the electric locomotive number range.^[1]^[2]

The second locomotive was delivered to the Electricity Supply Commission (ESCOM), the state-owned South African national power corporation, who placed it in service in Cape Town.^[1]^[2]

Characteristics

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The locomotive was powered by aMaschinenfabrik Augsburg-Nürnberg (MAN) 265 horsepower (198 kilowatts) eight-cylinder diesel engine prime mover. An AEG 110 kilowatts (150 horsepower) main generator and an AEG 12 kilowatts (16 horsepower) auxiliary generator were mounted directly in line between the engine and the cab. The engine was water-cooled with a fan that was belt-driven by the engine and that drew air through a conventional radiator.^[1]^[3]

This three-axle locomotive was essentially half a Class DS locomotive. Each axle was driven by a force-ventitated axle-suspended DC traction motor and sanding was arranged at the back and front of all wheels. Its single engine compartment was identical to either one of the two engine compartments of the Class DS. The cab was also identical to that of the Class DS, equipped with mechanically interlocked dual controls to enable operation in either direction.^[1]^[2]^[3]

Service

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South African Railways

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The SAR Class DS1 was withdrawn from yard service in July 1956 and transferred to the SAR's Civil Engineering department, who continued to use it for shunting at theBraamfontein Electric Running Shed (ERS) inJohannesburg into the early 1960s.^[1] Since it was used to move trolleys with heavy traction motors around the workshop, the originalAAR knuckle coupler was replaced by a low-mountedJohnston link-and-pin coupler and the original coupler pockets were blanked off.

No. D514 at Braamfontein Electric Running Shed

When it was finally retired from service and replaced by aClass S2 shunting steam locomotive, it was plinthed on a short piece of track on the western side of the Braamfontein ERS. The picture alongside shows the locomotive at Braamfontein, with the bell coupler mounted barely above track level and with the original coupler pocket blanked off.^[4]

ESKOM

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The ESKOM locomotive was initially employed by the City of Cape Town at theTable Bay Power Station. It was painted in a maroon livery and was namedCitelek. It was later transferred to theAthlone Power Station in Cape Town, where it was scrapped in about 1966.^[1]

References

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Wikimedia Commons has media related toSouth African Class DS1.

^^a ^b ^c ^d ^e ^f ^g ^h ⁱPaxton, Leith; Bourne, David (1985).Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 136–137.ISBN 0869772112.
^^a ^b ^c ^d ^e ^fEspitalier, T.J.; Day, W.A.J. (1947).The Locomotive in South Africa – A Brief History of Railway Development. Chapter VII – South African Railways (Continued). South African Railways and Harbours Magazine, March 1947. pp. 230–232.
^^a ^bSouth African Railways and Harbours Locomotive Diagram Book, 2'0" & 3'6" Gauge Steam Locomotives, 15 August 1941, as amended
^SAR-L Group: Message #44237 by Les Smith on 29 November 2012^{[dead link]}

Locomotives of South Africa

Steam

7' ¼" gauge	East London 0-4-0VB Table Bay 0-4-0ST Table Bay 0-4-0T Table Bay 0-4-0WT
Standard gauge	Cape 0-4-0TBlackie Cape 0-4-2 Cape 2-4-0T CGR 0-4-0STAid Natal 0-4-0STDurban Natal 0-4-0WTNatal Natal 4-4-0TPerseverance
Cape gauge Tank engines	CGR 0-4-0ST 1873 CGR 0-4-0ST 1874 CGR 0-4-0ST 1881 CGR 0-4-0ST 1881Coffee Pot CGR 0-6-0ST CGR 0-6-0T 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 CGR 1st Class 4-4-0T CGR 2nd Class 4-4-0T CGR 3rd Class 2-6-0T CGR Railmotor CSAR Class C CSAR Class E CSAR Rack 4-6-4RT CSAR Railmotor Durban'sCongella Durban'sEdward Innes Durban'sJohn Milne Durban'sSir Albert Port Elizabeth 0-4-0ST Kowie Railway 0-6-0T Kowie Railway 4-4-0T Metropolitan & Suburban 4-6-2T NGR 2-6-0TDurban &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 13 Tonner NZASM 14 Tonner NZASM 18 Tonner NZASM 19 Tonner NZASM 32 Tonner NZASM 40 Tonner PPR 26 Tonner PPR 35 TonnerPortuguese 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 Railmotor SAR Dock 0-4-0ST SAR Dock 0-4-0T SWA 2-8-0T
Cape gauge Tender engines	CGR 1st Class 2-6-0 1876 BP 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 CGR 1st Class 4-4-0TT CGR 2nd Class 2-6-2TT 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 1882 Joy CGR 4th Class 4-6-0TT 1884 CGR 5th Class 4-6-0 1890 CGR 5th Class 4-6-0 1891 NGRHavelock 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 1st SAR Class 14C 2nd SAR Class 14C 3rd SAR Class 14C 4th 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 1928 SAR Class 16DA 1930 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 SARKatanga SWA 2-8-0
Cape 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 CopperJohn King &Miner Cape CopperBritannia Cape CopperCaledonia Cape CopperClara Cape Copper Condenser Cape CopperScotia Namaqua CopperPioneer Walvis Bay 2-4-2THope
2' & 600mm gauges	ACR Class NG-G16A CGR NG 0-4-0T CGR NG 0-6-0T CGR NG 4-6-2T CGR Type A 2-6-4T CGR Type C 0-4-0T NGR Class N 4-6-2T SAR Dutton SAR NG 0-4-0T 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 SWA Class Ha SWA Class Hb SWA Class Hc SWA Class Hd SWA Jung SWA Zwillinge

Electric

Amcoal Class E38

Gas-electric

SAR Gas-electric

Diesel

Cape 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 TFR Class 35-800 SAR Class 36-000 SAR Class 36-200 SAR Class 37-000 Spoornet Class 39-000 TFR Class 39-200 TFR Class 43-000 TFR Class 44-000 TFR Class 45-000
2' gauge Diesel–electric	SAR Class 91-000
Cape gauge Diesel–hydraulic	SAR Class 61-000
Cape gauge Electro-diesel	Spoornet Class 38-000

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