South African Class 3 4-8-2

Specifications
Specifications
Configuration:;
• Whyte	4-8-2
• UIC	♠ 2'D1'n2 – ♥ 2'D1'h2
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	45+1⁄2 in (1,156 mm)
Trailing dia.	30 in (762 mm)
Tender wheels	30 in (762 mm)
Wheelbase	55 ft 7+3⁄4 in (16,961 mm)
• Engine	30 ft 9 in (9,373 mm)
• Leading	6 ft (1,829 mm)
• Coupled	12 ft 9 in (3,886 mm)
• Tender	16 ft 6 in (5,029 mm)
• Tender bogie	4 ft 6 in (1,372 mm)
Length:;
• Over couplers	63 ft 2+1⁄2 in (19,266 mm)
Height	♠ 12 ft 6 in (3,810 mm); ♥ 12 ft 4+3⁄4 in (3,778 mm)
Frame type	Plate
Axle load	♠ 15 LT 2 cwt (15,340 kg); ♥ 15 LT 11 cwt (15,800 kg)
• Leading	♠ 11 LT 13 cwt 2 qtr (11,860 kg); ♥ 14 LT 4 cwt (14,430 kg)
• 1st coupled	♠ 14 LT 8 cwt (14,630 kg); ♥ 15 LT (15,240 kg)
• 2nd coupled	♠ 15 LT 2 cwt (15,340 kg); ♥ 15 LT 11 cwt (15,800 kg)
• 3rd coupled	♠ 14 LT 8 cwt 2 qtr (14,660 kg); ♥ 15 LT 1 cwt (15,290 kg)
• 4th coupled	♠ 15 LT (15,240 kg); ♥ 14 LT 18 cwt (15,140 kg)
• Trailing	♠ 9 LT 10 cwt (9,652 kg); ♥ 9 LT 18 cwt (10,060 kg)
• Tender bogie	Bogie 1:; ♣ 20 LT 1 cwt (20,370 kg); ♦ 21 LT 14 cwt (22,050 kg); Bogie 2:; ♣ 20 LT 10 cwt (20,830 kg); ♦ 21 LT 16 cwt (22,150 kg)
• Tender axle	♣ 10 LT 5 cwt (10,410 kg); ♦ 10 LT 18 cwt (11,070 kg)
Adhesive weight	♠ 58 LT 18 cwt (59,850 kg); ♥ 60 LT 10 cwt (61,470 kg)
Loco weight	♠ 93 LT (94,490 kg); ♥ 84 LT 12 cwt (85,960 kg)
Tender weight	♣ 40 LT 11 cwt (41,200 kg); ♦ 43 LT 10 cwt (44,200 kg)
Total weight	♠♣ 133 LT 11 cwt (135,700 kg); ♠♦ 136 LT 10 cwt (138,700 kg); ♥♣ 125 LT 3 cwt (127,200 kg); ♥♦ 128 LT 1 cwt (130,100 kg)
Tender type	TJ (2-axle bogies) – 1446–1450; TM (2-axle bogies) – 1451–1475; TJ, TL, TM permitted
Fuel type	Coal
Fuel capacity	♣ 6 LT (6.1 t); ♦ 8 LT 5 cwt (8.4 t)
Water cap.	♣ 3,500 imp gal (15,900 L); ♦ 4,000 imp gal (18,200 L)
Firebox:
• Type	♠ Belpaire; ♥ Round-top
• Grate area	♠ 34 sq ft (3.2 m2); ♥ 37 sq ft (3.4 m2)
Boiler:;
• Type	♥ Watson Standard no. 2
• Pitch	♠ 7 ft 4 in (2,235 mm); ♥ 7 ft 5+1⁄2 in (2,273 mm)
• Diameter	♠ 5 ft 6+1⁄8 in (1,680 mm); ♥ 5 ft 7+1⁄2 in (1,714 mm)
• Tube plates	♠ 18 ft 6 in (5,639 mm); ♥ 19 ft 4 in (5,893 mm) steel f/b; 19 ft 3+5⁄8 in (5,883 mm) copper f/b
• Small tubes	♠ 237: tubes 2+1⁄4 in (57 mm); ♥ 87: 2+1⁄2 in (64 mm)
• Large tubes	♥ 30: 5+1⁄2 in (140 mm)
Boiler pressure	190 psi (1,310 kPa)
Safety valve	♠ Ramsbottom; ♥ Pop
Heating surface:
• Firebox	♠ 139 sq ft (12.9 m2); ♥ 142 sq ft (13.2 m2)
• Tubes	♠ 2,582 sq ft (239.9 m2); ♥ 1,933 sq ft (179.6 m2)
• Total surface	♠ 2,721 sq ft (252.8 m2); ♥ 2,075 sq ft (192.8 m2)
Superheater:;
• Heating area	♥ 434 sq ft (40.3 m2)
Cylinders	Two
Cylinder size	21 in (533 mm) bore; 24 in (610 mm) stroke
Valve gear	Walschaerts
Valve type	Murdoch's D slide
Couplers	Johnston link-and-pin; AAR knuckle (1930s)

Type and origin
Type and origin
	♠ Class 3 as built with a Belpaire firebox; ♥ Class 3R rebuilt with a Watson Standard boiler; ♣ – Type TJ tender, 1st batch (1909); ♦ – Type TM tender, 2nd batch (1911)
Power type	Steam
Designer	Natal Government Railways; (D.A. Hendrie)
Builder	North British Locomotive Company
Serial number	18829-18833, 19217-19241
Model	NGR Hendrie D
Build date	1909–1910
Total produced	30

NGR Class B 4-8-2 1909
South African Classes 3 & 3R 4-8-2
NGR Class B 4-8-2 1909; South African Classes 3 & 3R 4-8-2
	NGR Class B no. 332, later SAR Class 3 no. 1448
Power type
Type and origin
	♠ Class 3 as built with a Belpaire firebox; ♥ Class 3R rebuilt with a Watson Standard boiler; ♣ – Type TJ tender, 1st batch (1909); ♦ – Type TM tender, 2nd batch (1911)
Power type	Steam
Designer	Natal Government Railways; (D.A. Hendrie)
Builder	North British Locomotive Company
Serial number	18829-18833, 19217-19241
Model	NGR Hendrie D
Build date	1909–1910
Total produced	30
Configuration:;
Specifications
Configuration:;
• Whyte	4-8-2
• UIC	♠ 2'D1'n2 – ♥ 2'D1'h2
Driver	2nd coupled axle
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading dia.	28+1⁄2 in (724 mm)
Coupled dia.	45+1⁄2 in (1,156 mm)
Trailing dia.	30 in (762 mm)
Tender wheels	30 in (762 mm)
Wheelbase	55 ft 7+3⁄4 in (16,961 mm)
• Engine	30 ft 9 in (9,373 mm)
• Leading	6 ft (1,829 mm)
• Coupled	12 ft 9 in (3,886 mm)
• Tender	16 ft 6 in (5,029 mm)
• Tender bogie	4 ft 6 in (1,372 mm)
Length:;
• Over couplers	63 ft 2+1⁄2 in (19,266 mm)
Height	♠ 12 ft 6 in (3,810 mm); ♥ 12 ft 4+3⁄4 in (3,778 mm)
Frame type	Plate
Axle load	♠ 15 LT 2 cwt (15,340 kg); ♥ 15 LT 11 cwt (15,800 kg)
• Leading	♠ 11 LT 13 cwt 2 qtr (11,860 kg); ♥ 14 LT 4 cwt (14,430 kg)
• 1st coupled	♠ 14 LT 8 cwt (14,630 kg); ♥ 15 LT (15,240 kg)
• 2nd coupled	♠ 15 LT 2 cwt (15,340 kg); ♥ 15 LT 11 cwt (15,800 kg)
• 3rd coupled	♠ 14 LT 8 cwt 2 qtr (14,660 kg); ♥ 15 LT 1 cwt (15,290 kg)
• 4th coupled	♠ 15 LT (15,240 kg); ♥ 14 LT 18 cwt (15,140 kg)
• Trailing	♠ 9 LT 10 cwt (9,652 kg); ♥ 9 LT 18 cwt (10,060 kg)
• Tender bogie	Bogie 1:; ♣ 20 LT 1 cwt (20,370 kg); ♦ 21 LT 14 cwt (22,050 kg); Bogie 2:; ♣ 20 LT 10 cwt (20,830 kg); ♦ 21 LT 16 cwt (22,150 kg)
• Tender axle	♣ 10 LT 5 cwt (10,410 kg); ♦ 10 LT 18 cwt (11,070 kg)
Adhesive weight	♠ 58 LT 18 cwt (59,850 kg); ♥ 60 LT 10 cwt (61,470 kg)
Loco weight	♠ 93 LT (94,490 kg); ♥ 84 LT 12 cwt (85,960 kg)
Tender weight	♣ 40 LT 11 cwt (41,200 kg); ♦ 43 LT 10 cwt (44,200 kg)
Total weight	♠♣ 133 LT 11 cwt (135,700 kg); ♠♦ 136 LT 10 cwt (138,700 kg); ♥♣ 125 LT 3 cwt (127,200 kg); ♥♦ 128 LT 1 cwt (130,100 kg)
Tender type	TJ (2-axle bogies) – 1446–1450; TM (2-axle bogies) – 1451–1475; TJ, TL, TM permitted
Fuel type	Coal
Fuel capacity	♣ 6 LT (6.1 t); ♦ 8 LT 5 cwt (8.4 t)
Water cap.	♣ 3,500 imp gal (15,900 L); ♦ 4,000 imp gal (18,200 L)
Firebox:
• Type	♠ Belpaire; ♥ Round-top
• Grate area	♠ 34 sq ft (3.2 m2); ♥ 37 sq ft (3.4 m2)
Boiler:;
• Type	♥ Watson Standard no. 2
• Pitch	♠ 7 ft 4 in (2,235 mm); ♥ 7 ft 5+1⁄2 in (2,273 mm)
• Diameter	♠ 5 ft 6+1⁄8 in (1,680 mm); ♥ 5 ft 7+1⁄2 in (1,714 mm)
• Tube plates	♠ 18 ft 6 in (5,639 mm); ♥ 19 ft 4 in (5,893 mm) steel f/b; 19 ft 3+5⁄8 in (5,883 mm) copper f/b
• Small tubes	♠ 237: tubes 2+1⁄4 in (57 mm); ♥ 87: 2+1⁄2 in (64 mm)
• Large tubes	♥ 30: 5+1⁄2 in (140 mm)
Boiler pressure	190 psi (1,310 kPa)
Safety valve	♠ Ramsbottom; ♥ Pop
Heating surface:
• Firebox	♠ 139 sq ft (12.9 m2); ♥ 142 sq ft (13.2 m2)
• Tubes	♠ 2,582 sq ft (239.9 m2); ♥ 1,933 sq ft (179.6 m2)
• Total surface	♠ 2,721 sq ft (252.8 m2); ♥ 2,075 sq ft (192.8 m2)
Superheater:;
• Heating area	♥ 434 sq ft (40.3 m2)
Cylinders	Two
Cylinder size	21 in (533 mm) bore; 24 in (610 mm) stroke
Valve gear	Walschaerts
Valve type	Murdoch's D slide
Couplers	Johnston link-and-pin; AAR knuckle (1930s)
Tractive effort
Performance figures
Tractive effort	♠ 34,890 lbf (155.2 kN) @ 75%; ♥ 32,790 lbf (145.9 kN) @ 75%
Operators
Career
Operators	Natal Government Railways; South African Railways
Class	NGR Class B; SAR Classes 3 & 3R
Number in class	30
Numbers	NGR 330–334, 345–369; SAR 1446–1475
Nicknames	Hendrie D
Delivered	1909, 1911
First run	1909
Withdrawn	1974
	The leading coupled axle had flangeless wheels

The South African Railways Class 3 4-8-2 of 1909 was a steam locomotive from the pre-Union era in the Colony of Natal.

In 1909, the Natal Government Railways placed the world's first true Mountain type locomotive in service when five Class B 4-8-2 tender locomotives were commissioned. Another 25 were placed in service in 1911. In 1912, when they were assimilated into the South African Railways, they were renumbered and designated Class 3. The Mountain wheel arrangement went on to become the most numerous steam locomotive wheel configuration in use in South Africa.