South African Class MC1 2-6-6-0 - Train

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The South African Railways Class MC1 2-6-6-0 of 1914 was a steam locomotive.

South African Class MC1 2-6-6-0

SAR Class MC1 with engine driver Mr. Kok, c. 1930

Type and origin
Power type	Steam
Designer	North British Locomotive Company
Builder	North British Locomotive Company
Serial number	20442-20456
Build date	1913-1914
Total produced	15

Specifications
Configuration:
• Whyte	2-6-6-0 (Denver)
• UIC	(1'C)Chv4
Driver	3rd & 6th coupled axles
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	45+1⁄2 in (1,156 mm)
Tender wheels	34 in (864 mm)
Wheelbase	60 ft (18,288 mm)
• Engine	33 ft 5 in (10,185 mm)
• Coupled	8 ft 4 in (2,540 mm) per unit
• Tender	16 ft 9 in (5,105 mm)
• Tender bogie	4 ft 7 in (1,397 mm)
Length:
• Over couplers	68 ft 5+1⁄8 in (20,857 mm)
Height	12 ft 5+3⁄16 in (3,789 mm)
Axle load	16 LT 4 cwt (16,460 kg)
• Leading	7 LT 19 cwt (8,078 kg)
• 1st coupled	13 LT 16 cwt (14,020 kg)
• 2nd coupled	15 LT 3 cwt (15,390 kg)
• 3rd coupled	15 LT 7 cwt (15,600 kg)
• 4th coupled	14 LT 19 cwt (15,190 kg)
• 5th coupled	14 LT 10 cwt (14,730 kg)
• 6th coupled	16 LT 4 cwt (16,460 kg)
• Tender bogie	Bogie 1: 27 LT 10 cwt (27,940 kg) Bogie 2: 23 LT 11 cwt (23,930 kg)
• Tender axle	13 LT 15 cwt (13,970 kg)
Adhesive weight	89 LT 19 cwt (91,390 kg)
Loco weight	97 LT 18 cwt (99,470 kg)
Tender weight	51 LT 1 cwt (51,870 kg)
Total weight	148 LT 19 cwt (151,300 kg)
Tender type	MP1 (2-axle bogies)
Fuel type	Coal
Fuel capacity	10 LT (10.2 t)
Water cap.	4,250 imp gal (19,300 l)
Firebox type	Round-top
• Firegrate area	42.5 sq ft (3.95 m²)
Boiler:
• Pitch	7 ft 6 in (2,286 mm)
• Diameter	5 ft 8 in (1,727 mm)
• Tube plates	16 ft 2+3⁄4 in (4,947 mm)
• Small tubes	152: 2+1⁄4 in (57 mm)
• Large tubes	27: 5+3⁄8 in (137 mm)
Boiler pressure	200 psi (1,379 kPa)
Safety valve	Ramsbottom
Heating surface	2,214 sq ft (205.7 m²)
• Tubes	2,060 sq ft (191 m²)
• Firebox	154 sq ft (14.3 m²)
Superheater:
• Heating area	580 sq ft (54 m²)
Cylinders	Four
High-pressure cylinder	18 in (457 mm) bore 26 in (660 mm) stroke
Low-pressure cylinder	28+1⁄2 in (724 mm) bore 26 in (660 mm) stroke
Valve gear	Walschaerts
Valve type	HP Piston, LP Slide
Couplers	Johnston link-and-pin

Performance figures
Tractive effort	46,414 lbf (206.46 kN) @ 50%

Career
Operators	South African Railways
Class	Class MC1
Number in class	15
Numbers	1634-1648
Delivered	1914
First run	1914
Withdrawn	1937

In 1914 the South African Railways placed fifteen Class MC1 Mallet articulated compound steam locomotives with a 2-6-6-0 wheel arrangement in service.[1][2]

Manufacturer

Orders for an improved version of the Class MC were placed with the North British Locomotive Company in 1913. When the fifteen locomotives were delivered and placed in service in May 1914, they were designated Class MC1 and numbered in the range from 1634 to 1648.[1][2][3][4]

Characteristics

The Class MC1 were duplicates of the Class MC in most respects, to the extent that the majority of spare parts for the two classes were interchangeable. Improvements consisted mainly of 1⁄2 inch (13 millimetres) larger diameter high-pressure and low-pressure cylinders and a redesigned boiler which included a superheater instead of the saturated steam boiler of the Class MC. The high-pressure cylinders of the hind engine unit were equipped with piston valves while the low-pressure cylinders of the front engine unit were equipped with slide valves.[1][2][3]

An externally obvious difference was the main steam pipes from the dome to the high-pressure cylinders, which was no longer arranged vertically down directly to the cylinders along the outside of the boiler, but internally via the superheater in the smokebox and from there along the underside of the running boards back to the cylinders. The result was a much better performing locomotive with an increased tractive effort brought about by the larger cylinders.[1][2][3]

The locomotives were delivered with Type MP1 tenders with a coal capacity of 10 long tons (10.2 tonnes) and a water capacity of 4,250 imperial gallons (19,300 litres). The same tender was used by altogether sixteen locomotive classes, but those of the Class MC1 were fitted with a radial type of drawgear.[3]

Modifications

When the coupled wheel tyres had to be renewed, the diameter of the wheels was increased from 45+1⁄2 inches (1,156 millimetres) to 46 inches (1,168 millimetres). This reduced the tractive effort from 46,414 pounds-force (206 kilonewtons) at 50% of boiler pressure to 45,900 pounds-force (204 kilonewtons). Unlike all other locomotive types where the SAR reported tractive effort at 75% of boiler pressure, it followed an ultra-conservative practice of reporting that of all Mallet locomotives at 50%.[3][5]

Service

The Class MC1 was placed in service on the coal line from Witbank to Germiston. In later years, some also saw service on the Natal mainline and the Cape Midland System. A number of them were transferred to the Cape Western System where they served as banking engines up the Hex River Railpass between De Doorns and Touws River.[1][2][5][6]

The locomotives were all finally withdrawn from service and scrapped during 1937.[3]

Illustration

The main picture shows driver Kok with his locomotive, c. 1930, while the following serve to illustrate both sides of the locomotive as well as the lined livery which was in use on the SAR when the locomotives were introduced.

No. 1635 in service as banking engine at De Doorns, c. 1930

Works picture of Class MC1 no. 1642, c. 1914

References

Wikimedia Commons has media related to South African Class MC1 2-6-6-0.

Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 21–22. ISBN 978-0-7153-5427-8.
Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. p. 85. ISBN 0869772112.
Espitalier, T.J.; Day, W.A.J. (1945). The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued). South African Railways and Harbours Magazine, May 1945. p. 349.
North British Locomotive Company works list, compiled by Austrian locomotive historian Bernhard Schmeiser
Soul of A Railway, System 7, Western Transvaal, based in Johannesburg, Part 21: Witbank Line by Les Pivnic, Eugene Armer, Peter Stow and Peter Micenko. Caption 3. (Accessed on 4 May 2017)
Soul of A Railway - System 1 – Part 3: Wellington to Touws River – Caption 26 (Accessed on 27 November 2016)

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 0-4-0T 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
Cape 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
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 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
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 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

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

List of South African locomotive classes
South African locomotive numbering and classification

South African steam locomotive tenders

Cape gauge

Type CL
Type CZ

Type ET
Type ET1
Type EW
Type EW1
Type EW2

Type FT

Type GT

Type HT

Type JT
Type JT1
Type JV

Type KT

Type LP

Type MP
Type MP1
Type MR
Type MS
Type MT
Type MT1
Type MT2
Type MX
Type MY
Type MY1

Type SH
Type SK

Type TJ
Type TL
Type TM

Type WE
Type WG

Type X-17
Type X-20
Type XC
Type XC1
Type XD
Type XE
Type XE1
Type XF
Type XF1
Type XF2
Type XJ
Type XM
Type XM1
Type XM2
Type XM3
Type XM4
Type XP1
Type XS

Type YB
Type YC
Type YE
Type YE1

Type ZA
Type ZB
Type ZC
Type ZE

List of South African locomotive classes
South African locomotive history

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