CGR 4th Class 4-6-0TT 1880

Specifications
Specifications
Configuration:;
• Whyte	4-6-0TT (Tenwheeler)
• UIC	2'Cn2t
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	27+1⁄2 in (698 mm)
Coupled dia.	Eastern: 38 in (965 mm); Midland: 42 in (1,067 mm)
Tender wheels	36 in (914 mm)
Wheelbase	35 ft 2+7⁄8 in (10,741 mm)
• Engine	17 ft (5,182 mm)
• Leading	5 ft (1,524 mm)
• Coupled	8 ft (2,438 mm)
• Tender	8 ft (2,438 mm)
Length:;
• Over couplers	43 ft 4+7⁄8 in (13,230 mm)
Height	Eastern: 12 ft 1 in (3,683 mm); Midland: 12 ft (3,658 mm)
Axle load	8 LT 14 cwt (8,840 kg)
• Leading	8 LT 16 cwt (8,941 kg)
• 1st coupled	7 LT 13 cwt (7,773 kg)
• 2nd coupled	8 LT 14 cwt (8,840 kg)
• 3rd coupled	7 LT 11 cwt (7,671 kg)
• Tender axle	Axle 1: 8 LT 14 cwt (8,840 kg); Axle 2: 6 LT 17 cwt (6,960 kg); Axle 3: 7 LT 11 cwt (7,671 kg)
Adhesive weight	23 LT 18 cwt (24,280 kg)
Loco weight	32 LT 14 cwt (33,220 kg)
Tender weight	23 LT 2 cwt (23,470 kg)
Total weight	55 LT 16 cwt (56,700 kg)
Tender type	3-axle
Fuel type	Coal
Fuel capacity	6 LT (6.1 t)
Water cap.	600 imp gal (2,730 L) engine
Tender cap.	1,675 imp gal (7,610 L)
Firebox:
• Type	Round-top
• Grate area	Regular: 11.7 sq ft (1.09 m2); Tilney: 10.9 sq ft (1.01 m2)
Boiler:;
• Pitch	Eastern: 5 ft 9 in (1,753 mm); Midland: 5 ft 11 in (1,803 mm)
• Diameter	3 ft 6 in (1,067 mm) inside; 4 ft 2 in (1,270 mm) outside
• Tube plates	10 ft 1 in (3,073 mm)
• Small tubes	145: 1+3⁄4 in (44 mm)
Boiler pressure	140 psi (965 kPa)
Safety valve	Salter
Heating surface:
• Firebox	65 sq ft (6.0 m2)
• Tubes	688 sq ft (63.9 m2)
• Total surface	753 sq ft (70.0 m2)
Cylinders	Two
Cylinder size	15 in (381 mm) bore; 20 in (508 mm) stroke
Valve gear	Stephenson
Couplers	Johnston link-and-pin

Type and origin
Type and origin
Power type	Steam
Designer	Cape Government Railways; (Michael Stephens)
Builder	Robert Stephenson and Company
Serial number	2361-2366, 2385-2390, 2431-2436
Build date	1879-1880
Total produced	18

CGR 4th Class 4-6-0TT 1880
South African Class 04 4-6-0TT 1880
CGR 4th Class 4-6-0TT 1880; South African Class 04 4-6-0TT 1880
	No. E29 on a passenger train, c. 1886
Power type
Type and origin
Power type	Steam
Designer	Cape Government Railways; (Michael Stephens)
Builder	Robert Stephenson and Company
Serial number	2361-2366, 2385-2390, 2431-2436
Build date	1879-1880
Total produced	18
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0TT (Tenwheeler)
• UIC	2'Cn2t
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	27+1⁄2 in (698 mm)
Coupled dia.	Eastern: 38 in (965 mm); Midland: 42 in (1,067 mm)
Tender wheels	36 in (914 mm)
Wheelbase	35 ft 2+7⁄8 in (10,741 mm)
• Engine	17 ft (5,182 mm)
• Leading	5 ft (1,524 mm)
• Coupled	8 ft (2,438 mm)
• Tender	8 ft (2,438 mm)
Length:;
• Over couplers	43 ft 4+7⁄8 in (13,230 mm)
Height	Eastern: 12 ft 1 in (3,683 mm); Midland: 12 ft (3,658 mm)
Axle load	8 LT 14 cwt (8,840 kg)
• Leading	8 LT 16 cwt (8,941 kg)
• 1st coupled	7 LT 13 cwt (7,773 kg)
• 2nd coupled	8 LT 14 cwt (8,840 kg)
• 3rd coupled	7 LT 11 cwt (7,671 kg)
• Tender axle	Axle 1: 8 LT 14 cwt (8,840 kg); Axle 2: 6 LT 17 cwt (6,960 kg); Axle 3: 7 LT 11 cwt (7,671 kg)
Adhesive weight	23 LT 18 cwt (24,280 kg)
Loco weight	32 LT 14 cwt (33,220 kg)
Tender weight	23 LT 2 cwt (23,470 kg)
Total weight	55 LT 16 cwt (56,700 kg)
Tender type	3-axle
Fuel type	Coal
Fuel capacity	6 LT (6.1 t)
Water cap.	600 imp gal (2,730 L) engine
Tender cap.	1,675 imp gal (7,610 L)
Firebox:
• Type	Round-top
• Grate area	Regular: 11.7 sq ft (1.09 m2); Tilney: 10.9 sq ft (1.01 m2)
Boiler:;
• Pitch	Eastern: 5 ft 9 in (1,753 mm); Midland: 5 ft 11 in (1,803 mm)
• Diameter	3 ft 6 in (1,067 mm) inside; 4 ft 2 in (1,270 mm) outside
• Tube plates	10 ft 1 in (3,073 mm)
• Small tubes	145: 1+3⁄4 in (44 mm)
Boiler pressure	140 psi (965 kPa)
Safety valve	Salter
Heating surface:
• Firebox	65 sq ft (6.0 m2)
• Tubes	688 sq ft (63.9 m2)
• Total surface	753 sq ft (70.0 m2)
Cylinders	Two
Cylinder size	15 in (381 mm) bore; 20 in (508 mm) stroke
Valve gear	Stephenson
Couplers	Johnston link-and-pin
Tractive effort
Performance figures
Tractive effort	11,250 lbf (50.0 kN) @ 75%
Operators
Career
Operators	Cape Government Railways; South African Railways
Class	CGR 4th Class, SAR Class 04
Number in class	18
Numbers	M34-M39, M50-M55, E27-E32
Delivered	1880-1881
First run	1880

The Cape Government Railways 4th Class 4-6-0TT of 1880 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1880 and 1881, the Cape Government Railways placed eighteen 4th Class 4-6-0 tank-and-tender locomotives in mainline service on its Midland and Eastern Systems, working out of Port Elizabeth and East London respectively. It was the first South African locomotive to be built to a local design. Four of these locomotives were still in service to come onto the South African Railways roster in 1912.

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