South African Class DS1

Class DS1 shunting locomotive 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
AAR wheel arr	C
UIC class	Co
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Wheel diameter	42 in (1,067 mm)
Wheelbase	11 ft 6 in (3,505 mm)
Length	27 ft 10 ¹⁄₂ in (8,496 mm) headstocks 30 ft 8 ¹⁄₂ in (9,360 mm) couplers
Height	12 ft 6 ³⁄₄ in (3,829 mm)
Axle load	14 ⁷⁄₂₀ long tons (14.6 t)
Loco weight	40 ¹³⁄₂₀ long tons (41.3 t)
Fuel type	Fuel oil
Fuel capacity	289 imp gal (1,310 l; 347 US gal)
Prime mover	MAN 205 hp (153 kW)
Engine type	Diesel
Generator	AEG 110 kW (150 hp) main AEG 12 kW (16 hp) auxiliary
Traction motors	Three AEG
Transmission	5.67:1 gear ratio

Performance figures
Power output	205 hp (153 kW)
Tractive effort	78 kN (18,000 lbf) starting

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

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The South 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 DS1 AEG diesel-electric shunting locomotive that 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]

Manufacturer

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

The second of these was a single locomotive with a Co wheel arrangement, of which two units were ordered from Allgemeine Elektricitäts-Gesellschaft (AEG) in Berlin at the same time as the single Class DS locomotive. 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]

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]

Characteristics

The locomotive was powered by a Maschinenfabrik Augsburg-Nürnberg (MAN) 205 horsepower (153 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]^[2]

This three-axle locomotive was essentially half a Class DS locomotive. 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]

Service

South African Railways

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 the Braamfontein Electric Running Shed (ERS) in Johannesburg into the early 1960s.^[1] Since it was used to move trolleys with heavy traction motors around the workshop, the knuckle coupler was replaced by a low-mounted bell type pin-and-shackle 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 a Class S2 steam locomotive, it was plinthed on a short piece of track on the western side of the Braamfontein electric repair shops. 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.^[3]

ESKOM

The ESKOM locomotive was initially employed by the City of Cape Town at the Table Bay Power Station and was named Citelek. It was later transferred to the Athlone Power Station in Cape Town, where it was scrapped in about 1966.^[1]

References

1 2 3 4 5 6 7 8 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 136–137. ISBN 0869772112.
1 2 South 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

Wikimedia Commons has media related to South African Class DS1.

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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