CGR 4th Class 4-6-0TT 1884

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.	38+1⁄2 in (978 mm)
Tender wheels	27+1⁄2 in (698 mm)
Wheelbase	39 ft 2 in (11,938 mm)
• Axle spacing; (Asymmetrical)	1-2: 3 ft 4 in (1,016 mm); 2-3: 4 ft 8 in (1,422 mm)
• Engine	18 ft 3 in (5,563 mm)
• Leading	5 ft (1,524 mm)
• Coupled	8 ft (2,438 mm)
• Tender	9 ft 3 in (2,819 mm)
• Tender bogie	4 ft 5+1⁄2 in (1,359 mm)
Length:;
• Over couplers	46 ft 7+1⁄2 in (14,211 mm)
Height	12 ft (3,658 mm)
Frame type	Plate
Loco weight	35 LT 1 cwt (35,610 kg)
Tender weight	20 LT 2 cwt 1 qtr (20,440 kg)
Total weight	55 LT 3 cwt 1 qtr (56,050 kg)
Tender type	3-axle (1 leading, 1 bogie)
Fuel type	Coal
Fuel capacity	5 LT (5.1 t)
Water cap.	600 imp gal (2,700 L) engine; 1,700 imp gal (7,700 L) tender
Firebox:
• Type	Round-top
• Grate area	18.25 sq ft (1.695 m2)
Boiler:;
• Pitch	5 ft 9 in (1,753 mm)
• Diameter	3 ft 6 in (1,067 mm)
• Tube plates	10 ft 4+1⁄2 in (3,162 mm)
• Small tubes	143: 1+3⁄4 in (44 mm)
Boiler pressure	130 psi (896 kPa)
Safety valve	Salter
Heating surface:
• Firebox	83.23 sq ft (7.732 m2)
• Tubes	679.6 sq ft (63.14 m2)
• Total surface	762.83 sq ft (70.869 m2)
Cylinders	Two
Cylinder size	15 in (381 mm) bore; 20 in (508 mm) stroke
Valve gear	Joy as built; Stephenson converted
Couplers	Johnston link-and-pin

Type and origin
Type and origin
Power type	Steam
Designer	Cape Government Railways; (J.D. Tilney)
Builder	Neilson and Company
Serial number	3068–3071
Build date	1883
Total produced	4

CGR 4th Class 4-6-0TT 1884
South African Class 04 4-6-0 1884
CGR 4th Class 4-6-0TT 1884; South African Class 04 4-6-0 1884
	Neilson works picture, c. 1884
Power type
Type and origin
Power type	Steam
Designer	Cape Government Railways; (J.D. Tilney)
Builder	Neilson and Company
Serial number	3068–3071
Build date	1883
Total produced	4
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.	38+1⁄2 in (978 mm)
Tender wheels	27+1⁄2 in (698 mm)
Wheelbase	39 ft 2 in (11,938 mm)
• Axle spacing; (Asymmetrical)	1-2: 3 ft 4 in (1,016 mm); 2-3: 4 ft 8 in (1,422 mm)
• Engine	18 ft 3 in (5,563 mm)
• Leading	5 ft (1,524 mm)
• Coupled	8 ft (2,438 mm)
• Tender	9 ft 3 in (2,819 mm)
• Tender bogie	4 ft 5+1⁄2 in (1,359 mm)
Length:;
• Over couplers	46 ft 7+1⁄2 in (14,211 mm)
Height	12 ft (3,658 mm)
Frame type	Plate
Loco weight	35 LT 1 cwt (35,610 kg)
Tender weight	20 LT 2 cwt 1 qtr (20,440 kg)
Total weight	55 LT 3 cwt 1 qtr (56,050 kg)
Tender type	3-axle (1 leading, 1 bogie)
Fuel type	Coal
Fuel capacity	5 LT (5.1 t)
Water cap.	600 imp gal (2,700 L) engine; 1,700 imp gal (7,700 L) tender
Firebox:
• Type	Round-top
• Grate area	18.25 sq ft (1.695 m2)
Boiler:;
• Pitch	5 ft 9 in (1,753 mm)
• Diameter	3 ft 6 in (1,067 mm)
• Tube plates	10 ft 4+1⁄2 in (3,162 mm)
• Small tubes	143: 1+3⁄4 in (44 mm)
Boiler pressure	130 psi (896 kPa)
Safety valve	Salter
Heating surface:
• Firebox	83.23 sq ft (7.732 m2)
• Tubes	679.6 sq ft (63.14 m2)
• Total surface	762.83 sq ft (70.869 m2)
Cylinders	Two
Cylinder size	15 in (381 mm) bore; 20 in (508 mm) stroke
Valve gear	Joy as built; Stephenson converted
Couplers	Johnston link-and-pin
Tractive effort
Performance figures
Tractive effort	11,396 lbf (50.69 kN) @ 75%
Operators
Career
Operators	Cape Government Railways; South African Railways
Class	CGR 4th Class, SAR Class 04
Number in class	4
Numbers	E49-E52
Delivered	1884
First run	1884

The Cape Government Railways 4th Class 4-6-0TT of 1884 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1884, the Cape Government Railways placed four experimental 4th Class 4-6-0 tank-and-tender locomotives in service. It was designed by John D. Tilney, the Locomotive Superintendent of the Eastern System, to be able to use the low-grade local coal with its high content of incombustible matter.