CGR 4th Class 4-6-0TT 1882 Joy

Specifications
Specifications
Configuration:;
• Whyte	4-6-0TT as built (Tenwheeler); 4-6-0 converted
• UIC	2'Cn2t as built; 2'Cn2 converted
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	27+1⁄2 in (698 mm)
Coupled dia.	42 in (1,067 mm)
Tender wheels	36+1⁄2 in (927 mm)
Wheelbase	35 ft 3⁄8 in (10,678 mm)
• Engine	16 ft 10 in (5,131 mm)
• Leading	5 ft (1,524 mm)
• Coupled	8 ft (2,438 mm)
• Tender	8 ft (2,438 mm)
Length:;
• Over couplers	43 ft 2+3⁄8 in (13,167 mm)
Height	12 ft (3,658 mm)
Axle load	7 LT 16 cwt (7,925 kg)
• Leading	8 LT 16 cwt (8,941 kg)
• 1st coupled	5 LT 17 cwt (5,944 kg)
• 2nd coupled	7 LT 9 cwt (7,570 kg)
• 3rd coupled	7 LT 16 cwt (7,925 kg)
Adhesive weight	21 LT 2 cwt (21,440 kg)
Loco weight	29 LT 18 cwt (30,380 kg)
Tender weight	19 LT (19,300 kg)
Total weight	48 LT 18 cwt (49,680 kg)
Tender type	3-axle
Fuel type	Coal
Fuel capacity	3 LT (3.0 t)
Water cap.	600 imp gal (2,730 L) engine; 1,700 imp gal (7,730 L) tender
Firebox:
• Type	Round-top
• Grate area	11.7 sq ft (1.09 m2)
Boiler:;
• Pitch	5 ft 9 in (1,753 mm)
• Diameter	3 ft 6+3⁄8 in (1,076 mm)
• Tube plates	10 ft 4+1⁄2 in (3,162 mm)
Boiler pressure	140 psi (965 kPa)
Safety valve	Salter as built; Ramsbottom reboilered
Heating surface:
• Firebox	61.6 sq ft (5.72 m2)
• Tubes	690 sq ft (64 m2)
• Total surface	751.6 sq ft (69.83 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; (Michael Stephens)
Builder	Neilson and Company
Serial number	2828-2848, 2951-2954, 2978-2987
Build date	1882-1883
Total produced	35

CGR 4th Class 4-6-0TT 1882 Joy
OVGS 4th Class G 4-6-0
South African Class 04 4-6-0
CGR 4th Class 4-6-0TT 1882 Joy; OVGS 4th Class G 4-6-0; South African Class 04 4-6-0
	As built with side tanks and short firebox, c. 1882
Power type
Type and origin
Power type	Steam
Designer	Cape Government Railways; (Michael Stephens)
Builder	Neilson and Company
Serial number	2828-2848, 2951-2954, 2978-2987
Build date	1882-1883
Total produced	35
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0TT as built (Tenwheeler); 4-6-0 converted
• UIC	2'Cn2t as built; 2'Cn2 converted
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	27+1⁄2 in (698 mm)
Coupled dia.	42 in (1,067 mm)
Tender wheels	36+1⁄2 in (927 mm)
Wheelbase	35 ft 3⁄8 in (10,678 mm)
• Engine	16 ft 10 in (5,131 mm)
• Leading	5 ft (1,524 mm)
• Coupled	8 ft (2,438 mm)
• Tender	8 ft (2,438 mm)
Length:;
• Over couplers	43 ft 2+3⁄8 in (13,167 mm)
Height	12 ft (3,658 mm)
Axle load	7 LT 16 cwt (7,925 kg)
• Leading	8 LT 16 cwt (8,941 kg)
• 1st coupled	5 LT 17 cwt (5,944 kg)
• 2nd coupled	7 LT 9 cwt (7,570 kg)
• 3rd coupled	7 LT 16 cwt (7,925 kg)
Adhesive weight	21 LT 2 cwt (21,440 kg)
Loco weight	29 LT 18 cwt (30,380 kg)
Tender weight	19 LT (19,300 kg)
Total weight	48 LT 18 cwt (49,680 kg)
Tender type	3-axle
Fuel type	Coal
Fuel capacity	3 LT (3.0 t)
Water cap.	600 imp gal (2,730 L) engine; 1,700 imp gal (7,730 L) tender
Firebox:
• Type	Round-top
• Grate area	11.7 sq ft (1.09 m2)
Boiler:;
• Pitch	5 ft 9 in (1,753 mm)
• Diameter	3 ft 6+3⁄8 in (1,076 mm)
• Tube plates	10 ft 4+1⁄2 in (3,162 mm)
Boiler pressure	140 psi (965 kPa)
Safety valve	Salter as built; Ramsbottom reboilered
Heating surface:
• Firebox	61.6 sq ft (5.72 m2)
• Tubes	690 sq ft (64 m2)
• Total surface	751.6 sq ft (69.83 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	11,250 lbf (50.0 kN) @ 75%
Operators
Career
Operators	Cape Government Railways; OVGS; Beira & Mashonaland Railway; South African Railways
Class	CGR 4th, OVGS G, SAR 04
Number in class	35
Numbers	W56-W76, M76-M79, E39-E48
Nicknames	Joy & Converted Joy
Delivered	1882-1883
First run	1882
Withdrawn	c. 1932

The Cape Government Railways 4th Class 4-6-0TT of 1882 with Joy valve gear, was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1882 and 1883, the Cape Government Railways placed 68 4th Class 4-6-0 tank-and-tender locomotives in mainline service on all three its systems. It was an improved version of the 4th Class locomotives of 1880 and 1881 and was delivered in two versions, built by two manufacturers.

Of these locomotives, thirty-five were built by Neilson and Company with Joy valve gear. Seventeen of them were still in service when the South African Railways was established in 1912.

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