CGR 2nd Class 2-6-2TT 1875

CGR 2nd Class 2-6-2TT 1875

CGR 2nd Class 2-6-2TT no. M26, with tender and "front porch railings", Fish River Bridge, c. 1881
Type and origin
Power type Steam
Designer Robert Stephenson and Company
Builder Robert Stephenson and Company
Avonside Engine Company
Kitson and Company
Serial number RS 2205-2210, 2332-2339, 2353 engines
RS 2215-2217, 2221-2223 tenders
Avonside 1110-1113, 1157-1158, 1193-1194, 1209-1210
Kitson 2038-2041
Build date 1875-1879
Total produced 29 (2 lost at sea)
Specifications
Configuration 2-6-2T & TT "Prairie"
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Leading wheel
diameter
24 in (610 mm)
Driver diameter 38 in (965 mm)
Trailing wheel
diameter
24 in (610 mm)
Wheelbase 20 ft 3 in (6.172 m) total
8 ft (2.438 m) drivers
Length 27 ft (8.230 m) over couplers
Height 12 ft (3.658 m)
Axle load 9 LT 6 cwt 3 qtr (9.5 t) on middle driver
Weight on drivers 23 LT 17 cwt (24.2 t)
Locomotive weight 28 LT 14 cwt 4 qtr (29.2 t) w/o
Fuel type Coal
Fuel capacity 15 long hundredweight (0.8 t) engine
2 long tons (2.0 t) tender
Water capacity 650 imp gal (3,000 l; 780 US gal) engine
900 imp gal (4,100 l; 1,100 US gal) tender
Boiler 10 ft (3.048 m) length inside
5 ft 10 12 in (1.791 m) pitch
Boiler pressure 130 psi (900 kPa)
Firegrate area 11 sq ft (1.0 m2)
Heating surface:
– Tubes
692 sq ft (64.289 m2)
– Firebox 58 sq ft (5.4 m2)
– Total 750 sq ft (70 m2)
Cylinders Two
Cylinder size 15 in (381 mm) bore
20 in (508 mm) stroke
Performance figures
Tractive effort 11,546 lbf (51 kN) at 75% pressure
Locomotive brake Clarke’s chain brakes
Career
Operator(s) Cape Government Railways
Class 2nd Class
Number in class 27
Delivered 1875-1879
First run 1875 [1][2]

The CGR 2nd Class 2-6-2TT of 1875 is a South African steam locomotive from the pre-Union era in the Cape Colony.

The first locomotives to enter service on the new 3 feet 6 inches Cape gauge mainlines of the Cape Government Railways were 2-6-2 Prairie type side-tank engines that were delivered between 1875 and 1879. Four-wheeled tenders were also acquired and the locomotives could be operated in either a tank or tank-and-tender engine configuration, as circumstances demanded. These locomotives were later designated the Cape 2nd Class.[1][2]

Cape Government Railways

In 1872 the Cape Government took over the operation of all railways in the Cape Colony and established the Cape Government Railways (CGR). Shortly before, it had been decided to adopt the narrower 3 feet 6 inches gauge instead of the existing standard gauge for all further railway expansions, since it would decrease the cost of construction through the difficult terrain inland from the three major ports at Cape Town, Port Elizabeth and East London. The 3 feet 6 inches gauge is still known as Cape gauge.[1][3]

Since the whole operational area within the Colony was so vast, the CGR was divided into three semi-autonomous systems. The Cape Eastern System was based in East London, with A.E. Schmid as Resident Engineer and J.D. Tilney as Locomotive Superintendent. The Cape Midland System was based in Port Elizabeth, with D. Jackson Scott as Resident Engineer and Mr. Edwards as Locomotive Superintendent. The Cape Western System was based in Cape Town, with W.G. Brounger as Resident Engineer as well as Consulting Engineer for the whole CGR and Michael Stephens as Locomotive Superintendent.[3]

Manufacturers

The first Cape gauge mainline locomotives to enter service on the CGR were delivered in 1875. An order for six 2-6-2T Prairie type locomotives was placed with Robert Stephenson and Company, followed by a separate order for six four-wheeled tenders. The Stephenson locomotives were numbered W1 and W2 for the Cape Western system and M7 to M10 for the Midland System.[2]

Four more locomotives were ordered from the Avonside Engine Company at the same time. Two of the Avonside locomotives went to the Midland System, numbered M5 and M6. The other two were intended for the Eastern System, but they were lost at sea during delivery when the ship Memento sank off East London on 5 February 1876.[2]

These were followed by nineteen more, all with tenders, ordered from three manufacturers.

When a locomotive classification system was introduced by the CGR, these locomotives became the Cape 2nd Class.[1]

Characteristics

While all the locomotives were delivered with tenders, they could be operated with or without the tenders as circumstances demanded. In practice they were used in the tank engine configuration while performing shunting or short-distance work and in the tank-and-tender configuration when an increased coal and water supply was required during mainline work.[1]

The locomotives were equipped with Clarke’s chain brakes. The braking system proved to be unsatisfactory, since breaking of the chain was not uncommon. In one instance this resulted in a bad accident with loss of life while a train was descending the Hex River rail pass.[1]

Service

One of these locomotives is known to have been named, number W1 "Byron". All of them were renumbered on occasion when the CGR altered its locomotive numbering systems circa 1886, 1888, 1890 and 1896.[1][2]

By 1904 only three of them were still in service and being employed on shunting and construction tasks. By 1912, when locomotive classification and renumbering was implemented on the newly established South African Railways, none of these 2nd Class locomotives remained in service.[2]

Works numbers and renumbering

The builders, works numbers, year built, original numbers and known renumbering of the Cape 2nd Class of 1875 are shown in the table.[1][2]

Configurations illustrated

The photographs illustrate the locomotive in various configurations.

See also

References

 
 

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  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Holland, D.F. (1971). Steam Locomotives of the South African Railways, Volume 1: 1859-1910 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 23–25. ISBN 978-0-7153-5382-0.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 C.G.R. Numbering Revised, Article by Dave Littley, SA Rail May–June 1993, pp. 94-95.
  3. 3.0 3.1 The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, pp. 4, 8, 11.