South African Class 6 4-6-0

Specifications
Specifications
Configuration:;
• Whyte	4-6-0 (Tenwheeler)
• UIC	2'Cn2
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	54 in (1,372 mm)
Tender wheels	37 in (940 mm)
Wheelbase	41 ft 9+1⁄8 in (12,729 mm)
• Axle spacing; (Asymmetrical)	1-2: 4 ft 9 in (1,448 mm); 2-3: 6 ft 3 in (1,905 mm)
• Engine	20 ft 3+1⁄4 in (6,179 mm)
• Leading	5 ft 4+1⁄2 in (1,638 mm)
• Coupled	11 ft (3,353 mm)
• Tender	10 ft (3,048 mm)
Length:;
• Over couplers	♠ 50 ft 8+1⁄2 in (15,456 mm); ♥ 51 ft 7+1⁄4 in (15,729 mm)
Height	♠ 12 ft 8 in (3,861 mm); ♥ 12 ft 10+3⁄4 in (3,931 mm)
Frame type	Plate
Axle load	♠ 11 LT 19 cwt 2 qtr (12,170 kg); ♥ 13 LT 8 cwt (13,620 kg)
• Leading	♠ 9 LT 15 cwt 2 qtr (9,932 kg); ♥ 10 LT 17 cwt 2 qtr (11,050 kg)
• Coupled	♥ 13 LT 8 cwt (13,620 kg)
• 1st coupled	♠ 10 LT 17 cwt 2 qtr (11,050 kg)
• 2nd coupled	♠ 11 LT 19 cwt 2 qtr (12,170 kg)
• 3rd coupled	♠ 11 LT 18 cwt 2 qtr (12,120 kg)
• Tender axle	9 LT 17 cwt (10,010 kg) average
Adhesive weight	♠ 34 LT 15 cwt 2 qtr (35,330 kg); ♥ 40 LT 1 cwt (40,690 kg)
Loco weight	♠ 44 LT 11 cwt (45,260 kg); ♥ 51 LT 1 cwt 2 qtr (51,890 kg)
Tender weight	29 LT 11 cwt (30,020 kg)
Total weight	♠ 74 LT 2 cwt (75,290 kg); ♥ 80 LT 12 cwt 2 qtr (81,920 kg)
Tender type	YB (3-axle); YB, YC, YE, YE1 permitted
Fuel type	Coal
Fuel capacity	5 LT 10 cwt (5.6 t)
Water cap.	2,370 imp gal (10,800 L)
Firebox:
• Type	Round-top, Belpaire
• Grate area	♠ 16.8 sq ft (1.56 m2); ♥ 16.6 sq ft (1.54 m2)
Boiler:;
• Pitch	♠ 6 ft 6 in (1,981 mm); ♥ 7 ft (2,134 mm)
• Diameter	♠ 4 ft 2 in (1,270 mm); ♥ 4 ft 9 in (1,448 mm)
• Tube plates	♠ 11 ft 2+1⁄8 in (3,407 mm); ♥ 11 ft 2+1⁄8 in (3,407 mm)
• Small tubes	♠ 185: 1+3⁄4 in (44 mm); ♥ 220: 2 in (51 mm)
Boiler pressure	♠ 160 psi (1,103 kPa); ♥ 180 psi (1,241 kPa)
Safety valve	Ramsbottom
Heating surface:
• Firebox	♠ 95 sq ft (8.8 m2); ♥ 111 sq ft (10.3 m2)
• Tubes	♠ 946 sq ft (87.9 m2); ♥ 1,287.5 sq ft (119.61 m2)
• Total surface	♠ 1,041 sq ft (96.7 m2); ♥ 1,398.5 sq ft (129.92 m2)
Cylinders	Two
Cylinder size	17 in (432 mm) bore; 26 in (660 mm) stroke
Valve gear	Stephenson
Valve type	Slide
Couplers	Johnston link-and-pin; AAR knuckle (1930s)

Type and origin
Type and origin
	♠ Original locomotive, as built; ♥ Locomotive rebuilt with Belpaire firebox
Power type	Steam
Designer	Cape Government Railways; (H.M. Beatty)
Builder	Dübs and Company
Serial number	3050–3073, 3087–3102
Model	CGR 6th
Build date	1893–1894
Total produced	40

CGR 6th Class 4-6-0 1893
OVGS 6th Class L 4-6-0
CSAR Class 6-L1 4-6-0
South African Class 6 4-6-0
CGR 6th Class 4-6-0 1893; OVGS 6th Class L 4-6-0; CSAR Class 6-L1 4-6-0; South African Class 6 4-6-0
	No. 439, Capital Park, 24 September 2000
Power type
Type and origin
	♠ Original locomotive, as built; ♥ Locomotive rebuilt with Belpaire firebox
Power type	Steam
Designer	Cape Government Railways; (H.M. Beatty)
Builder	Dübs and Company
Serial number	3050–3073, 3087–3102
Model	CGR 6th
Build date	1893–1894
Total produced	40
Configuration:;
Specifications
Configuration:;
• Whyte	4-6-0 (Tenwheeler)
• UIC	2'Cn2
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	54 in (1,372 mm)
Tender wheels	37 in (940 mm)
Wheelbase	41 ft 9+1⁄8 in (12,729 mm)
• Axle spacing; (Asymmetrical)	1-2: 4 ft 9 in (1,448 mm); 2-3: 6 ft 3 in (1,905 mm)
• Engine	20 ft 3+1⁄4 in (6,179 mm)
• Leading	5 ft 4+1⁄2 in (1,638 mm)
• Coupled	11 ft (3,353 mm)
• Tender	10 ft (3,048 mm)
Length:;
• Over couplers	♠ 50 ft 8+1⁄2 in (15,456 mm); ♥ 51 ft 7+1⁄4 in (15,729 mm)
Height	♠ 12 ft 8 in (3,861 mm); ♥ 12 ft 10+3⁄4 in (3,931 mm)
Frame type	Plate
Axle load	♠ 11 LT 19 cwt 2 qtr (12,170 kg); ♥ 13 LT 8 cwt (13,620 kg)
• Leading	♠ 9 LT 15 cwt 2 qtr (9,932 kg); ♥ 10 LT 17 cwt 2 qtr (11,050 kg)
• Coupled	♥ 13 LT 8 cwt (13,620 kg)
• 1st coupled	♠ 10 LT 17 cwt 2 qtr (11,050 kg)
• 2nd coupled	♠ 11 LT 19 cwt 2 qtr (12,170 kg)
• 3rd coupled	♠ 11 LT 18 cwt 2 qtr (12,120 kg)
• Tender axle	9 LT 17 cwt (10,010 kg) average
Adhesive weight	♠ 34 LT 15 cwt 2 qtr (35,330 kg); ♥ 40 LT 1 cwt (40,690 kg)
Loco weight	♠ 44 LT 11 cwt (45,260 kg); ♥ 51 LT 1 cwt 2 qtr (51,890 kg)
Tender weight	29 LT 11 cwt (30,020 kg)
Total weight	♠ 74 LT 2 cwt (75,290 kg); ♥ 80 LT 12 cwt 2 qtr (81,920 kg)
Tender type	YB (3-axle); YB, YC, YE, YE1 permitted
Fuel type	Coal
Fuel capacity	5 LT 10 cwt (5.6 t)
Water cap.	2,370 imp gal (10,800 L)
Firebox:
• Type	Round-top, Belpaire
• Grate area	♠ 16.8 sq ft (1.56 m2); ♥ 16.6 sq ft (1.54 m2)
Boiler:;
• Pitch	♠ 6 ft 6 in (1,981 mm); ♥ 7 ft (2,134 mm)
• Diameter	♠ 4 ft 2 in (1,270 mm); ♥ 4 ft 9 in (1,448 mm)
• Tube plates	♠ 11 ft 2+1⁄8 in (3,407 mm); ♥ 11 ft 2+1⁄8 in (3,407 mm)
• Small tubes	♠ 185: 1+3⁄4 in (44 mm); ♥ 220: 2 in (51 mm)
Boiler pressure	♠ 160 psi (1,103 kPa); ♥ 180 psi (1,241 kPa)
Safety valve	Ramsbottom
Heating surface:
• Firebox	♠ 95 sq ft (8.8 m2); ♥ 111 sq ft (10.3 m2)
• Tubes	♠ 946 sq ft (87.9 m2); ♥ 1,287.5 sq ft (119.61 m2)
• Total surface	♠ 1,041 sq ft (96.7 m2); ♥ 1,398.5 sq ft (129.92 m2)
Cylinders	Two
Cylinder size	17 in (432 mm) bore; 26 in (660 mm) stroke
Valve gear	Stephenson
Valve type	Slide
Couplers	Johnston link-and-pin; AAR knuckle (1930s)
Tractive effort
Performance figures
Tractive effort	♠ 16,690 lbf (74.2 kN) @ 75%; ♥ 18,780 lbf (83.5 kN) @ 75%
Operators
Career
Operators	Cape Government Railways; OVGS; Imperial Military Railways; Central South African Railways; South African Railways; Sudan Railways
Class	CGR & OVGS 6th Class,; CSAR Class 6-L1, SAR Class 6
Number in class	40
Numbers	CGR 139-160, 353-370; OVGS 60-69; CSAR 336-345; SAR 401-440
Delivered	1893–1894
First run	1893
Withdrawn	1973
Disposition	Three preserved (429, 432, 439), remainder scrapped

The South African Railways Class 6 4-6-0 of 1893 was a steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1893 and 1894, the Cape Government Railways placed forty 6th Class steam locomotives with a 4-6-0 wheel arrangement in service, twenty-two on its Western System and eighteen on its Midland System. Ten of them were sold to the Oranje-Vrijstaat Gouwerment-Spoorwegen in 1897. At the end of the Second Boer War in 1902, these ten became the Class 6-L1 on the Central South African Railways. In 1912, all forty locomotives were renumbered and designated Class 6 when they were assimilated into the South African Railways.