South West African Class Hd

DSWA Class Hd 2-8-2
South West African Class Hd 2-8-2
South African Class NG5 2-8-2

No. 40 plinthed at Usakos, May 1984

Type and origin
Power type	Steam
Designer	Henschel and Son
Builder	Henschel and Son
Serial number	10720-10722
Model	Class Hd
Build date	1912
Total produced	3

Specifications
Configuration	2-8-2 (Mikado)
Driver	3rd coupled axle
Gauge	600 mm (1 ft 11 ⁵⁄₈ in) narrow
Leading dia.	21 ²¹⁄₃₂ in (550 mm)
Coupled dia.	33 ⁷⁄₈ in (860 mm)
Trailing dia.	21 ²¹⁄₃₂ in (550 mm)
Tender wheels	20 ¹⁄₂ in (521 mm)
Wheelbase	38 ft 6 ⁵⁄₈ in (11,751 mm)
• Engine	17 ft ¹¹⁄₁₆ in (5,199 mm)
• Coupled	9 ft 7 in (2,921 mm)
• Tender	11 ft 5 ³⁄₄ in (3,499 mm)
• Tender bogie	3 ft 3 ³⁄₈ in (1,000 mm)
Wheel spacing (Asymmetrical)	1-2: 3 ft 1 ⁷⁄₁₆ in (951 mm) 2-3: 3 ft 4 ¹⁄₈ in (1,019 mm) 3-4: 3 ft 1 ⁷⁄₁₆ in (951 mm)
Length:
• Over couplers	49 ft 9 ¹⁄₄ in (15,170 mm)
Height	10 ft 9 ¹⁵⁄₁₆ in (3,300 mm)
Frame type	Plate
Loco weight	32 LT 17 cwt (33,380 kg)
Tender weight	25 LT 11 cwt 3 qtr (26,000 kg)
Total weight	58 LT 8 cwt 3 qtr (59,380 kg)
Tender type	2-axle bogies
Fuel type	Coal
Fuel capacity	2 LT 17 cwt (2.9 t)
Water cap	2,860 imp gal (13,000 l)
Firebox type	Round-top
• Firegrate area	16.7 sq ft (1.55 m²)
Boiler:
• Pitch	5 ft 8 ⁷⁄₈ in (1,749 mm)
• Diameter	3 ft 11 ³⁄₄ in (1,213 mm)
• Tube plates	13 ft 1 ¹⁄₂ in (4,000 mm)
• Small tubes	114: 1 ³⁄₄ in (44 mm)
• Large tubes	12: 4 ²³⁄₃₂ in (120 mm)
Boiler pressure	171 psi (1,179 kPa)
Heating surface	968 sq ft (89.9 m²)
• Tubes	900 sq ft (84 m²)
• Firebox	68 sq ft (6.3 m²)
Superheater:
• Heating area	169 sq ft (15.7 m²)
Cylinders	Two
Cylinder size	15 ³⁄₄ in (400 mm) bore 17 ³⁄₄ in (451 mm) stroke
Valve gear	Walschaerts
Valve type	Piston
Loco brake	Air
Train brakes	Air & vacuum
Couplers	Buffers and chain

Performance figures
Tractive effort	16,610 lbf (73.9 kN) @ 75%

Career
Operators	Otavi Mining and Railway Co. South African Railways
Class	DSWA Class Hd, SAR Class NG5
Number in class	3
Numbers	SW40-SW42
Delivered	1912
First run	1912
Withdrawn	1960

The South West African Class Hd 2-8-2 of 1912 was a narrow gauge steam locomotive from the Deutsch-Südwest-Afrika era.

In 1912, the German administration in Deutsch-Südwest-Afrika acquired three Class Hd tender locomotives with a 2-8-2 Mikado type wheel arrangement, for lease to the Otavi Mining and Railway Company to use on the line from Swakopmund to Karibib. When these locomotives were taken onto the roster of the South African Railways after the First World War, they retained their German classification and engine numbers, but with an "SW" prefix to their numbers.^[1]^[2]

When a system of grouping narrow gauge locomotives into classes was eventually introduced by the South African Railways, they were designated Class NG5, along with similar locomotives which were placed in service by the South African Railways in 1922.^[1]^[3]^[4]

Manufacturer

Increasing traffic demands arising from the copper mines at Tsumeb led to a requirement for more locomotives. Three narrow gauge 2-8-2 Mikado type steam locomotives were built for the German administration in Deutsch-Südwest-Afrika (DSWA) by Henschel and Son in Germany in 1912. They were designated Class Hd, numbered in the range from 40 to 42, and leased to the Otavi Mining and Railway Company for use on the section between Swakopmund and Karibib.^[1]^[2]^[5]

The "Hd" classification identified the locomotive type as the fourth class to have been built for DSWA by Henschel.^[1]

Characteristics

The locomotives were superheated, with Walschaerts valve gear, piston valves and outside plate frames. Since they were to be used across the Namib Desert, they were equipped with dust covers to protect the motion from wind-blown sand. Their rigidly mounted leading and trailing carrying wheels were arranged as radial axles, to allow for sideways motion of the wheels in relation to the locomotive frame, since the locomotive did not have separate bogie trucks. This resulted in a rigid wheelbase of 17 feet ¹¹⁄₁₆ inch (5,199 millimetres), even though the leading carrying wheels were arranged to the rear instead of in front of the cylinders.^[1]^[2]

As built, the sand boxes were mounted on top of the boiler, aft of the dome. Their tenders, also built by Henschel, rode on two four-wheeled bogies and had a coal capacity of 2 long tons 17 hundredweight (2.9 tonnes) and a water capacity of 2,860 imperial gallons (13,000 litres). The engines were equipped for trains with air brakes, which was not yet in use in South Africa at the time.^[1]^[2]

South African Railways

After the First World War, when the former German colony came under South African administration and all railway operations in South West Africa (SWA) were taken over by the South African Railways (SAR) in 1922, these locomotives retained their Hd classification and engine numbers, but with an "SW" prefix to the numbers. This was to prevent confusion with the two Class NG1 narrow gauge locomotives of the SAR, which were numbered NG40 and NG41.^[1]

In SAR service, the locomotives were also equipped with vacuum train brakes.^[3]

Reclassification

A system of grouping narrow gauge locomotives into classes was only adopted by the SAR somewhere between 1928 and 1930 and at that point, these three locomotives, along with six similar locomotives which were built to a revised design and placed in service by the SAR in SWA in 1922, were all designated Class NG5. The original three locomotives retained their original German engine numbers, but the SW prefix was done away with, since the two Class NG1 locomotives with duplicate engine numbers were being withdrawn from service at the time.^[1]^[3]

Service

They remained in service in SWA for their entire working lives, until they were all withdrawn from service when the narrow gauge lines of the SWA system was regauged to Cape gauge in 1960. Since they were unsuitable for use on the narrow gauge line in the Langkloof, all six of the 1922 vintage Class NG5 locomotives were sold as scrap in 1962.^[1]

Number plate and plaques on no. 41, Otjiwarongo, 2011

Two of the 1912 vintage ex Class Hd locomotives were preserved. No. 40 was plinthed on the Usakos railway station platform, while no. 41 was plinthed outside Otjiwarongo railway station.^[6]

Commemoration

A postage stamp, depicting the Class Hd locomotive, was one of a set of four commemorative South West African postage stamps which were issued on 2 August 1985 to commemorate the narrow gauge locomotives which pioneered railways in the territory. The stamp design was by the noted stamp designer and artist Koos van Ellinckhuijzen.^[7]^[8]

Illustration

Works picture of Class Hd no. 40, c. 1912

References

1 2 3 4 5 6 7 8 9 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 102, 110, 116–117. ISBN 0869772112.
1 2 3 4 Espitalier, 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, October 1947. pp. 859-860.
1 2 3 South African Railways and Harbours Narrow Gauge Locomotive Diagram Book, 2'0" Gauge, S.A.R. Mechanical Dept. Drawing Office, Pretoria, 28 November 1932
↑ South African Railways and Harbours Locomotive Diagram Book, 2'0" & 3'6" Gauge Steam Locomotives, 15 August 1941, as amended
↑ Henschel-Lieferliste (Henschel & Son works list), compiled by Dietmar Stresow
↑ Middleton, John N. (2002). Railways of Southern Africa Locomotive Guide - 2002 (as amended by Combined Amendment List 4, January 2009) (2nd, Dec 2002 ed.). Herts, England: Beyer-Garratt Publications. p. 33.
↑ Philatelic Bulletin 44, issued by Philatelic Services and INTERSAPA, 1985
↑ De Jager, Okkie and Steenkamp, Riaan - The Art of J.J. (Koos) van Ellinckhuijzen

Wikimedia Commons has media related to South African Class Hd (2-8-2).

Steam Locomotives of South West Africa

600mm gauge (Narrow gauge)	Class Ha Class Hb Class Hc Class Hd Jung Zwillinge

3' 6" gauge (Cape gauge)	6-Coupled Tank 8-Coupled Tank 8-Coupled Tender 10-Coupled Tender

List of South African locomotive classes South African locomotive history

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

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 CGR 0-4-0ST 1881 Coffee 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's Congella Durban's Edward Innes Durban's John Milne Durban's Sir Albert Port Elizabeth 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 13 Tonner NZASM 14 Tonner NZASM 18 Tonner NZASM 19 Tonner NZASM 32 Tonner NZASM 40 Tonner PPR 26 Tonner PPR 35 Tonner Portuguese 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

3' 6" 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 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 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 SAR Katanga SWA 2-8-0

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 John King & Miner Cape Copper Britannia Cape Copper Caledonia Cape Copper Clara Cape Copper Condenser Cape Copper Scotia Namaqua Copper Pioneer Walvis Bay 2-4-2T Hope

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

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 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

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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