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South African Class 6Y 2-6-2

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1903 design of steam locomotive

This article is about one of several different Cape Government Railways locomotive types to be designated "6th Class". For the others, seeCape Government Railways 6th Class locomotives.

CGR 6th Class 2-6-2
SAR Class 6Y 2-6-2

No. 712 at Paardeneiland, c. 1930

Type and origin
Power type	Steam
Designer	Cape Government Railways (H.M. Beatty)
Builder	Kitson and Company
Serial number	4191–4192
Model	CGR 6th Class 2-6-2
Build date	1903
Total produced	2

Specifications
Configuration:
• Whyte	2-6-2 (Prairie)
• UIC	1'C1'n2
Driver	3rd coupled axle
Gauge	3 ft 6 in (1,067 mm)Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	60 in (1,524 mm)
Trailing dia.	33 in (838 mm)
Tender wheels	37 in (940 mm)
Wheelbase	46 ft7+5⁄8 in (14,214 mm)
• Axle spacing (Asymmetrical)	1-2: 5 ft 7 in (1,702 mm) 2-3: 5 ft 3 in (1,600 mm)
• Engine	25 ft 9 in (7,849 mm)
• Coupled	10 ft 10 in (3,302 mm)
• Tender	10 ft (3,048 mm)
Length:
• Over couplers	56 ft5+3⁄4 in (17,215 mm)
Height	12 ft 10 in (3,912 mm)
Frame type	Bar
Axle load	14 LT 3 cwt (14,380 kg)
• Leading	5 LT 11 cwt (5,639 kg)
• 1st coupled	11 LT 12 cwt (11,790 kg)
• 2nd coupled	13 LT 6 cwt (13,510 kg)
• 3rd coupled	14 LT 3 cwt (14,380 kg)
• Trailing	11 LT 10 cwt (11,680 kg)
• Tender axle	Axle 1: 10 LT 8 cwt (10,570 kg) Axle 2: 10 LT 15 cwt (10,920 kg) Axle 3: 10 LT 17 cwt (11,020 kg)
Adhesive weight	39 LT 1 cwt (39,680 kg)
Loco weight	56 LT 12 cwt (57,510 kg)
Tender weight	32 LT (32,510 kg)
Total weight	88 LT 12 cwt (90,020 kg)
Tender type	YE (3-axle)
Fuel type	Coal
Fuel capacity	5 LT 10 cwt (5.6 t)
Water cap.	2,825 imp gal (12,800 L)
Firebox:
• Type	Round-top
• Grate area	26 sq ft (2.4 m²)
Boiler:
• Pitch	7 ft1⁄2 in (2,146 mm)
• Diameter	4 ft7+3⁄4 in (1,416 mm)
• Tube plates	14 ft6+1⁄4 in (4,426 mm)
• Small tubes	178: 2 in (51 mm)
Boiler pressure	180 psi (1,241 kPa)
Safety valve	Ramsbottom
Heating surface:
• Firebox	110 sq ft (10 m²)
• Tubes	1,397 sq ft (129.8 m²)
• Total surface	1,507 sq ft (140.0 m²)
Cylinders	Two
Cylinder size	18+1⁄2 in (470 mm) bore 26 in (660 mm) stroke
Valve gear	Stephenson
Couplers	Johnston link-and-pin

Performance figures
Tractive effort	20,030 lbf (89.1 kN) @ 75%

Career
Operators	Cape Government Railways South African Railways
Class	CGR 6th Class 2-6-2 SAR Class 6Y
Number in class	2
Numbers	CGR 901-902 SAR 711-712
Delivered	1903
First run	1903
Withdrawn	1934

The 2nd coupled axle had flangeless wheels

TheSouth African Railways Class 6Y2-6-2 of 1903 was a steam locomotive from the pre-Union era in theCape of Good Hope.

In 1903, theCape Government Railways placed two 6th Classsteam locomotives with a2-6-2 Prairie type wheel arrangement in service. In 1912, when these locomotives were assimilated into the South African Railways, they were renumbered and designated Class 6Y.^[1]^[2]^[3]

Manufacturer

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The Cape 6th Class2-6-2 Prairie type locomotive was designed at the Salt River works of the Cape Government Railways (CGR) and was a further development of the6th Class2-6-4 Adriatic type. The2-6-4 locomotive itself came about as an experimental development of the very successful 6th Class4-6-0 locomotive and was initially also built with a2-6-2 Prairie wheel arrangement, but eventually modified to a2-6-4 wheel arrangement.^[1]

Development

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Good though the 6th Class 4-6-0 locomotives were, the requirement grew for larger and more powerful engines. It was becoming increasingly apparent at the time that such locomotives would require fireboxes with larger grate areas, which was not possible with the existing type of frame.^[1]

To overcome this problem, CGR Chief Locomotive Superintendent H.M. Beatty prepared designs for a new locomotive with a2-6-2 Prairie wheel arrangement in which the frame terminated in front of the firebox, where it connected to a casting which he termed the "bridle casting". This casting extended out on either side and had wider spaced frames attached to it, which allowed a wider and deeper firebox.^[1]^[3]

Because of the widened frames and larger firebox, trailing carrier wheels were incorporated to take the weight of the firebox. The coupled wheels were also located further forward to accommodate the deeper firebox and, as a result, the leading bogie was replaced by a single axlebissel truck.^[1]^[3]

The first four locomotives of this design, later to be designatedClass 6Z by the South African Railways (SAR), were placed in service in 1901. They displayed a tendency to be unsteady at speed and the design was therefore modified to a2-6-4 Adriatic type wheel arrangement. Another four locomotives which incorporated this improvement were ordered in 1902, while the first four locomotives were modified accordingly.^[1]

In spite of their totally different appearance and wheel arrangement, the CGR designated them as 6th Class as well, possibly because they were intended as an improved 6th Class.^[2]^[4]

Redesign

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With an improved design of bissel truck, another two locomotives were ordered fromKitson and Company in 1903 and were once again built with a2-6-2 Prairie wheel arrangement. They had larger boilers as well as larger 60-inch diameter (1,524-millimetre) coupled wheels, compared to the 54-inch diameter (1,372-millimetre) coupled wheels of all other 6th Class locomotives. Numbered 901 and 902 for the Western System of the CGR, these two engines did not display the tendency to sway at speed and therefore retained their2-6-2 wheel arrangement.^[1]^[2]

Class 6 sub-classes

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When theUnion of South Africa was established on 31 May 1910, the three Colonial government railways (CGR,Natal Government Railways andCentral South African Railways) were united under a single administration to control and administer the railways, ports and harbours of the Union. Although the South African Railways and Harbours came into existence in 1910, the actual classification and renumbering of all the rolling stock of the three constituent railways were only implemented with effect from 1 January 1912.^[2]^[5]

In 1912, these two locomotives were renumbered 711 and 712 and designated Class 6Y on the SAR. The rest of the CGR's 6th Class locomotives, together with the Central South African Railways Classes 6-L1 to 6-L3 locomotives which had been inherited from theOranje-Vrijstaat Gouwermentspoorwegen via the Imperial Military Railways, were grouped into thirteen more sub-classes by the SAR. The 4-6-0 locomotives became SAR Classes 6, 6A to 6H and 6J to 6L, and the eight2-6-4 locomotives became Class 6Z.^[2]^[4]^[6]

Service

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In service, these two locomotives proved to be very successful, being fast, powerful, and good steamers. The experience which was gained with these two engines led to the introduction of theKaroo Class 4-6-2 Pacific type later in 1903. The two engines spent practically their entire working lives on the Cape mainline in theKaroo region, until they were withdrawn and scrapped in 1934.^[3]^[4]

Illustration

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CGR 6th Class2-6-2 atThree Sisters, c. 1905
Ex CGR 6th Class no. 901, SAR Class 6Y no. 711, at Touws River, c. 1930
Ex CGR 6th Class 2-6-2, SAR Class 6Y, c. 1930

References

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Wikimedia Commons has media related toSouth African Class 6Y 2-6-2.

^^a ^b ^c ^d ^e ^f ^gHolland, D.F. (1971).Steam Locomotives of the South African Railways. Vol. 1: 1859–1910 (1st ed.). Newton Abbott, England:David & Charles. pp. 52–54, 56.ISBN 978-0-7153-5382-0.
^^a ^b ^c ^d ^eClassification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer's Office, Pretoria, January 1912, pp. 8, 12, 14, 34 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
^^a ^b ^c ^dPaxton, Leith; Bourne, David (1985).Locomotives of the South African Railways (1st ed.). Cape Town: Struik. p. 45.ISBN 0869772112.
^^a ^b ^cHolland, D. F. (1972).Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England:David & Charles. p. 138.ISBN 978-0-7153-5427-8.
^The South African Railways – Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.
^South African Railways and Harbours Locomotive Diagram Book, 2'0" & 3'6" Gauge Steam Locomotives, 15 August 1941, as amended

v t e Locomotives of theCape of Good Hope
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 Cape 0-4-2 Cape 2-4-0T CGR 0-4-0STAid
3' 6" gauge	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 2-6-0 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 2-6-0ST CGR 1st Class 4-4-0 CGR 1st Class 4-4-0T CGR 1st Class 4-4-0TT CGR 2nd Class 2-6-2TT CGR 2nd Class 4-4-0T CGR 3rd Class 2-6-0T 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 1890 CGR 5th Class 1891 CGR 6th Class 1893 CGR 6th Class 1896 CGR 6th Class 1897 CGR 6th Class 1898 CGR 6th Class 1900 CGR 6th Class 1901 Baldwin CGR 6th Class 1901 Schenectady CGR 6th Class 1901 Neilson's CGR 6th Class 1902 CGR 6th Class 1904 CGR 6th Class 2-6-2 CGR 6th Class 2-6-4 CGR 7th Class 1892 CGR 7th Class 1896 CGR 7th Class 1902 CGR 8th Class 1901 CGR 8th Class 1902 CGR 8th Class 2-8-0 1903 CGR 8th Class 4-8-0 1903 CGR 8th Class 4-8-0 1903 Exp CGR 8th Class 2-8-0 1904 CGR 8th Class 4-8-0 1904 CGR 9th Class 1903 CGR 9th Class 1906 CGR 10th Class CGR Fairlie CGR Karoo 1903 CGR Karoo 1904 CGR Karoo Compound CGR Kitson-Meyer CGR Mountain 4-8-2 CGR Railmotor CGR Tandem Compound 1902 CGR Tandem Compound 1903 Kowie Railway 0-6-0T Kowie Railway 4-4-0T Metropolitan & Suburban 4-6-2T NCCR 7th Class 1899 NCCR 7th Class 1913 Port Elizabeth 0-4-0ST
2' 6" gauge	Cape Copper 0-6-0T Cape CopperBritannia Cape CopperCaledonia Cape CopperClara Cape Copper Condenser Cape CopperScotia Namaqua CopperPioneer Walvis BayHope
2' gauge	CGR Baldwin 2-6-0 CGR NG 0-4-0T CGR NG 0-6-0T CGR NG 4-6-2T CGR Type A CGR Type B CGR Type C
List of South African locomotive classes South African locomotive history South African locomotive numbering and classification

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

v t e 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 South African locomotive numbering and classification

South African steam locomotive tenders

Cape gauge

Type FT

Type GT

Type HT

Type KT

Type LP

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