CGR 3rd Class 4-4-0 1889

CGR 3rd Class 4-4-0 1889
South African Class 03 4-4-0 1889

CGR 3rd Class 4-4-0 no. 114 of 1889

Type and origin Power type Steam Designer Cape Government Railways (Michael Stephens) Builder Dübs and Company Serial number 2486-2497, 2536-2547 Build date 1888-1889 Total produced 24

Specifications Configuration: ​  • Whyte 4-4-0 (American)  • UIC 2'Bn2 Driver 1st coupled axle Gauge 3 ft 6 in (1,067 mm) Cape gauge Leading dia. 28 in (711 mm) Coupled dia. 49 in (1,245 mm) Tender wheels 37 in (940 mm) Wheelbase 37 ft 9 1⁄2 in (11,519 mm)  • Engine 18 ft 4 1⁄2 in (5,601 mm)  • Leading 4 ft 8 in (1,422 mm)  • Coupled 7 ft (2,134 mm)  • Tender 10 ft (3,048 mm) Length: ​  • Over couplers 45 ft 8 1⁄2 in (13,932 mm) Height 12 ft (3,658 mm) Axle load 10 LT 12 cwt (10,770 kg)  • Leading 9 LT 13 cwt (9,805 kg)  • Coupled 10 LT 12 cwt (10,770 kg)  • Tender axle 9 LT (9,144 kg) Adhesive weight 21 LT 4 cwt (21,540 kg) Loco weight 30 LT 17 cwt (31,350 kg) Tender weight 27 LT (27,430 kg) Total weight 57 LT 17 cwt (58,780 kg) Tender type 3-axle Fuel type Coal Fuel capacity 3 LT (3.0 t) Water cap 1,950 imp gal (8,860 l) Firebox type Round-top  • Firegrate area 13 sq ft (1.2 m2) Boiler: ​  • Pitch 6 ft 1 in (1,854 mm)  • Diameter 3 ft 8 1⁄2 in (1,130 mm)  • Tube plates 10 ft 4 1⁄2 in (3,162 mm) Boiler pressure 150 psi (1,034 kPa) Safety valve Ramsbottom Heating surface 763.5 sq ft (70.93 m2)  • Tubes 689 sq ft (64.0 m2)  • Firebox 74.5 sq ft (6.92 m2) Cylinders Two Cylinder size 15 in (381 mm) bore 22 in (559 mm) stroke Valve gear Stephenson Couplers Johnston link-and-pin

Performance figures Tractive effort 11,365 lbf (50.55 kN) @ 75%

Career Operators Cape Government Railways South African Railways Class CGR 3rd Class, SAR Class 03 Number in class 24 Numbers 93-116 Delivered 1889 First run 1889

The Cape Government Railways 3rd Class 4-4-0 of 1889 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1889, the Cape Government Railways placed 24 3rd Class tender locomotives with a 4-4-0 American type wheel arrangement in service. They were intended for passenger service on the Cape Western System.

In addition to increasing traffic on the Western System during 1887, the planned extension of the mainline northwards from Kimberley to Vryburg would also require an increase in the locomotive fleet. Michael Stephens, who had succeeded Hawthorne Thornton in 1885 as the Locomotive Superintendent of the Western System of the Cape Government Railways (CGR), therefore drew up detailed designs for a new 3rd Class passenger locomotive for the Western System. The drawings were prepared in the Salt River drawing office in Cape Town.

An order for 24 of these locomotives was placed with Dübs and Company in Glasgow. The locomotives were built in two batches of twelve and were delivered early in 1889, numbered in the range from 93 to 116.

With a boiler pressure of 150 pounds per square inch (1,034 kilopascals), these were the first South African engines to use Ramsbottom safety valves instead of the older Salter spring balance valves. The overall design resulted in an attractive locomotive which reflected credit on the designer and the drawing office.

The locomotives were, at the time, modern and up to date with latest practices and were possibly the most efficient engines in the country. As was usual practice with passenger locomotives on the CGR, they were painted green and had polished brass domes. They were placed in service on the easier sections of the Western System and were used on all types of traffic. On the section between Beaufort West and Kimberley, they worked passenger trains successfully in spite of the poor quality coal from the colliery at Viljoensdrif, thanks to their more liberally-proportioned boilers.

During the Second Boer War from 1899 to 1902, at least one of these locomotives, no. 108, had armour plating fitted to protect the engine and crew from Boer small-arms fire. Two of the photographs show no. 108 in armour plating.