South African Class 19D 4-8-2

Specifications
Specifications
Configuration:;
• Whyte	4-8-2 (Mountain)
• UIC	2'D1'h2; (Wankie Colliery 2'D1'n2)
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)
Trailing dia.	34 in (864 mm)
Tender wheels	TPX 34 in (864 mm)
Wheelbase	♠♥♣♦ʘP 58 ft 8+3⁄4 in (17,901 mm); ʘX 76 ft 7+7⁄8 in (23,365 mm)
• Axle spacing; (Asymmetrical)	1-2: 4 ft 10 in (1,473 mm); 2-3: 4 ft 9 in (1,448 mm); 3-4: 4 ft 10 in (1,473 mm)
• Engine	32 ft 3 in (9,830 mm)
• Leading	6 ft 4 in (1,930 mm)
• Coupled	14 ft 5 in (4,394 mm)
• Tender	T 20 ft 5 in (6,223 mm); P 16 ft 9 in (5,105 mm); X 34 ft 9 in (10,592 mm)
• Tender bogie	T 6 ft 2 in (1,880 mm); P 4 ft 7 in (1,397 mm); X 8 ft 8 in (2,642 mm)
Length:;
• Over couplers	♠♥♣♦ʘP 67 ft 3+5⁄8 in (20,514 mm); ʘX 86 ft 2+3⁄8 in (26,273 mm)
Height	12 ft 10+7⁄8 in (3,934 mm)
Frame type	Bar
Axle load	♠ 13 LT 4 cwt (13,410 kg); ♥ 15 LT 10 cwt (15,750 kg); ♣ 13 LT 5 cwt (13,460 kg); ♦ 13 LT 12 cwt (13,820 kg); ʘ 14 LT 1 cwt (14,280 kg); ʘ 13 LT 19 cwt (14,170 kg)
• Leading	♠ 14 LT 7 cwt (14,580 kg); ♥ 13 LT 18 cwt (14,120 kg); ♣ 14 LT 7 cwt (14,580 kg); ♦ 14 LT 13 cwt (14,890 kg); ʘ 14 LT 9 cwt (14,680 kg); ʘ 13 LT 15 cwt (13,970 kg)
• 1st coupled	♠ 13 LT 2 cwt (13,310 kg); ♥ 13 LT 13 cwt (13,870 kg); ♣ 13 LT 3 cwt (13,360 kg); ♦ 13 LT 11 cwt (13,770 kg); ʘ 14 LT 1 cwt (14,280 kg); ʘ 13 LT 19 cwt (14,170 kg)
• 2nd coupled	♠ 13 LT 4 cwt (13,410 kg); ♥ 13 LT 13 cwt (13,870 kg); ♣ 13 LT 5 cwt (13,460 kg); ♦ 13 LT 12 cwt (13,820 kg); ʘ 13 LT 17 cwt (14,070 kg); ʘ 13 LT 15 cwt (13,970 kg)
• 3rd coupled	♠ 12 LT 19 cwt (13,160 kg); ♥ 13 LT 10 cwt (13,720 kg); ♣ 13 LT 1 cwt (13,260 kg); ♦ 13 LT 9 cwt (13,670 kg); ʘ 13 LT 19 cwt (14,170 kg); ʘ 13 LT 17 cwt (14,070 kg)
• 4th coupled	♠ 13 LT 3 cwt (13,360 kg); ♥ 15 LT 10 cwt (15,750 kg); ♣ 13 LT (13,210 kg); ♦ 13 LT 9 cwt (13,670 kg); ʘ 13 LT 18 cwt (14,120 kg); ʘ 13 LT 16 cwt (14,020 kg)
• Trailing	♠ 11 LT 17 cwt (12,040 kg); ♥ 12 LT 9 cwt (12,650 kg); ♣ 12 LT 1 cwt (12,240 kg); ♦ 12 LT 8 cwt (12,600 kg); ʘ 11 LT 2 cwt (11,280 kg); ʘ 11 LT 10 cwt (11,680 kg)
• Tender bogie	Bogie 1:; T 32 LT 18 cwt (33,430 kg); P 27 LT 10 cwt (27,940 kg); X 37 LT 10 cwt (38,100 kg); Bogie 2:; T 33 LT 2 cwt (33,630 kg); P 23 LT 11 cwt (23,930 kg); X 35 LT 17 cwt (36,430 kg)
• Tender axle	T 16 LT 11 cwt (16,820 kg); P 13 LT 15 cwt (13,970 kg); X 12 LT 10 cwt (12,700 kg)
Adhesive weight	♠ 52 LT 8 cwt (53,240 kg); ♥ 56 LT 6 cwt (57,200 kg); ♣ 52 LT 9 cwt (53,290 kg); ♦ 54 LT 1 cwt (54,920 kg); ʘ 55 LT 15 cwt (56,640 kg); ʘ 55 LT 7 cwt (56,240 kg)
Loco weight	♠ 78 LT 12 cwt (79,860 kg); ♥ 80 LT 13 cwt (81,940 kg); ♣ 78 LT 17 cwt (80,120 kg); ♦ 81 LT 2 cwt (82,400 kg); ʘ 81 LT 6 cwt (82,600 kg); ʘ 79 LT 12 cwt (80,880 kg)
Tender weight	T 66 LT (67,060 kg); P 51 LT 1 cwt (51,870 kg); X 73 LT 7 cwt (74,530 kg)
Total weight	♠T 144 LT 12 cwt (146,900 kg); ♠P 129 LT 13 cwt (131,700 kg); ♥T 146 LT 13 cwt (149,000 kg); ♥P 131 LT 14 cwt (133,800 kg); ♣T 144 LT 17 cwt (147,200 kg); ♣P 129 LT 18 cwt (132,000 kg); ♦T 147 LT 2 cwt (149,500 kg); ♦P 132 LT 3 cwt (134,300 kg); ʘT 147 LT 6 cwt (149,700 kg); ʘP 132 LT 7 cwt (134,500 kg); ʘX 152 LT 19 cwt (155,400 kg)
Tender type	T MT (2-axle bogies); P MP1 (2-axle bogies); X MX (Buckeye 3-axle bogies); MP, MP1, MR, MT, MX, MY, MY1 permitted
Fuel type	Coal
Fuel capacity	T 12 LT (12.2 t); P 10 LT (10.2 t); X 12 LT (12.2 t)
Water cap.	T 6,000 imp gal (27,300 L); P 4,250 imp gal (19,300 L); X 6,500 imp gal (29,500 L)
Firebox:
• Type	Round-top
• Grate area	36 sq ft (3.3 m2)
Boiler:;
• Model	Watson Standard no. 1A
• Type	Domeless (2506-2525)
• Pitch	8 ft (2,438 mm)
• Diameter	5 ft (1,524 mm)
• Tube plates	20 ft 2 in (6,147 mm)
• Small tubes	76: 2+1⁄2 in (64 mm)
• Large tubes	24: 5+1⁄2 in (140 mm)
Boiler pressure	200 psi (1,379 kPa)
Safety valve	Ross Pop
Heating surface:
• Firebox	123 sq ft (11.4 m2)
• Tubes	1,700 sq ft (160 m2)
• Arch tubes	16 sq ft (1.5 m2)
• Total surface	1,839 sq ft (170.8 m2)
Superheater:;
• Heating area	♠♥♣♦ʘ 404 sq ft (37.5 m2); ʘ 390 sq ft (36 m2)
Cylinders	Two
Cylinder size	21 in (533 mm) bore; 26 in (660 mm) stroke
Valve gear	Walschaerts
Valve type	Piston
Couplers	AAR knuckle

Type and origin
Type and origin
	♠ Numbers 2506-2545 – ♥ Numbers 2626-2640; ♣ Numbers 2641-2680 – ♦ Numbers 2681-2720; ʘ Numbers 2721-2770 – ʘ Numbers 3321-3370; T MT tender – P MP1 tender – X MX tender
Power type	Steam
Designer	South African Railways; (W.A.J. Day)
Builder	Friedrich Krupp; Borsig Lokomotiv Werke; Škoda Works; Robert Stephenson & Hawthorns; North British Locomotive Company; Henschel & Son
Serial number	See table
Model	Class 19D
Build date	1937–1953
Total produced	268

South African Class 19D 4-8-2
South African Class 19D 4-8-2
	Umgeni Steam Railway's no. 2685, 30 July 2006
Power type
Type and origin
	♠ Numbers 2506-2545 – ♥ Numbers 2626-2640; ♣ Numbers 2641-2680 – ♦ Numbers 2681-2720; ʘ Numbers 2721-2770 – ʘ Numbers 3321-3370; T MT tender – P MP1 tender – X MX tender
Power type	Steam
Designer	South African Railways; (W.A.J. Day)
Builder	Friedrich Krupp; Borsig Lokomotiv Werke; Škoda Works; Robert Stephenson & Hawthorns; North British Locomotive Company; Henschel & Son
Serial number	See table
Model	Class 19D
Build date	1937–1953
Total produced	268
Configuration:;
Specifications
Configuration:;
• Whyte	4-8-2 (Mountain)
• UIC	2'D1'h2; (Wankie Colliery 2'D1'n2)
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)
Trailing dia.	34 in (864 mm)
Tender wheels	TPX 34 in (864 mm)
Wheelbase	♠♥♣♦ʘP 58 ft 8+3⁄4 in (17,901 mm); ʘX 76 ft 7+7⁄8 in (23,365 mm)
• Axle spacing; (Asymmetrical)	1-2: 4 ft 10 in (1,473 mm); 2-3: 4 ft 9 in (1,448 mm); 3-4: 4 ft 10 in (1,473 mm)
• Engine	32 ft 3 in (9,830 mm)
• Leading	6 ft 4 in (1,930 mm)
• Coupled	14 ft 5 in (4,394 mm)
• Tender	T 20 ft 5 in (6,223 mm); P 16 ft 9 in (5,105 mm); X 34 ft 9 in (10,592 mm)
• Tender bogie	T 6 ft 2 in (1,880 mm); P 4 ft 7 in (1,397 mm); X 8 ft 8 in (2,642 mm)
Length:;
• Over couplers	♠♥♣♦ʘP 67 ft 3+5⁄8 in (20,514 mm); ʘX 86 ft 2+3⁄8 in (26,273 mm)
Height	12 ft 10+7⁄8 in (3,934 mm)
Frame type	Bar
Axle load	♠ 13 LT 4 cwt (13,410 kg); ♥ 15 LT 10 cwt (15,750 kg); ♣ 13 LT 5 cwt (13,460 kg); ♦ 13 LT 12 cwt (13,820 kg); ʘ 14 LT 1 cwt (14,280 kg); ʘ 13 LT 19 cwt (14,170 kg)
• Leading	♠ 14 LT 7 cwt (14,580 kg); ♥ 13 LT 18 cwt (14,120 kg); ♣ 14 LT 7 cwt (14,580 kg); ♦ 14 LT 13 cwt (14,890 kg); ʘ 14 LT 9 cwt (14,680 kg); ʘ 13 LT 15 cwt (13,970 kg)
• 1st coupled	♠ 13 LT 2 cwt (13,310 kg); ♥ 13 LT 13 cwt (13,870 kg); ♣ 13 LT 3 cwt (13,360 kg); ♦ 13 LT 11 cwt (13,770 kg); ʘ 14 LT 1 cwt (14,280 kg); ʘ 13 LT 19 cwt (14,170 kg)
• 2nd coupled	♠ 13 LT 4 cwt (13,410 kg); ♥ 13 LT 13 cwt (13,870 kg); ♣ 13 LT 5 cwt (13,460 kg); ♦ 13 LT 12 cwt (13,820 kg); ʘ 13 LT 17 cwt (14,070 kg); ʘ 13 LT 15 cwt (13,970 kg)
• 3rd coupled	♠ 12 LT 19 cwt (13,160 kg); ♥ 13 LT 10 cwt (13,720 kg); ♣ 13 LT 1 cwt (13,260 kg); ♦ 13 LT 9 cwt (13,670 kg); ʘ 13 LT 19 cwt (14,170 kg); ʘ 13 LT 17 cwt (14,070 kg)
• 4th coupled	♠ 13 LT 3 cwt (13,360 kg); ♥ 15 LT 10 cwt (15,750 kg); ♣ 13 LT (13,210 kg); ♦ 13 LT 9 cwt (13,670 kg); ʘ 13 LT 18 cwt (14,120 kg); ʘ 13 LT 16 cwt (14,020 kg)
• Trailing	♠ 11 LT 17 cwt (12,040 kg); ♥ 12 LT 9 cwt (12,650 kg); ♣ 12 LT 1 cwt (12,240 kg); ♦ 12 LT 8 cwt (12,600 kg); ʘ 11 LT 2 cwt (11,280 kg); ʘ 11 LT 10 cwt (11,680 kg)
• Tender bogie	Bogie 1:; T 32 LT 18 cwt (33,430 kg); P 27 LT 10 cwt (27,940 kg); X 37 LT 10 cwt (38,100 kg); Bogie 2:; T 33 LT 2 cwt (33,630 kg); P 23 LT 11 cwt (23,930 kg); X 35 LT 17 cwt (36,430 kg)
• Tender axle	T 16 LT 11 cwt (16,820 kg); P 13 LT 15 cwt (13,970 kg); X 12 LT 10 cwt (12,700 kg)
Adhesive weight	♠ 52 LT 8 cwt (53,240 kg); ♥ 56 LT 6 cwt (57,200 kg); ♣ 52 LT 9 cwt (53,290 kg); ♦ 54 LT 1 cwt (54,920 kg); ʘ 55 LT 15 cwt (56,640 kg); ʘ 55 LT 7 cwt (56,240 kg)
Loco weight	♠ 78 LT 12 cwt (79,860 kg); ♥ 80 LT 13 cwt (81,940 kg); ♣ 78 LT 17 cwt (80,120 kg); ♦ 81 LT 2 cwt (82,400 kg); ʘ 81 LT 6 cwt (82,600 kg); ʘ 79 LT 12 cwt (80,880 kg)
Tender weight	T 66 LT (67,060 kg); P 51 LT 1 cwt (51,870 kg); X 73 LT 7 cwt (74,530 kg)
Total weight	♠T 144 LT 12 cwt (146,900 kg); ♠P 129 LT 13 cwt (131,700 kg); ♥T 146 LT 13 cwt (149,000 kg); ♥P 131 LT 14 cwt (133,800 kg); ♣T 144 LT 17 cwt (147,200 kg); ♣P 129 LT 18 cwt (132,000 kg); ♦T 147 LT 2 cwt (149,500 kg); ♦P 132 LT 3 cwt (134,300 kg); ʘT 147 LT 6 cwt (149,700 kg); ʘP 132 LT 7 cwt (134,500 kg); ʘX 152 LT 19 cwt (155,400 kg)
Tender type	T MT (2-axle bogies); P MP1 (2-axle bogies); X MX (Buckeye 3-axle bogies); MP, MP1, MR, MT, MX, MY, MY1 permitted
Fuel type	Coal
Fuel capacity	T 12 LT (12.2 t); P 10 LT (10.2 t); X 12 LT (12.2 t)
Water cap.	T 6,000 imp gal (27,300 L); P 4,250 imp gal (19,300 L); X 6,500 imp gal (29,500 L)
Firebox:
• Type	Round-top
• Grate area	36 sq ft (3.3 m2)
Boiler:;
• Model	Watson Standard no. 1A
• Type	Domeless (2506-2525)
• Pitch	8 ft (2,438 mm)
• Diameter	5 ft (1,524 mm)
• Tube plates	20 ft 2 in (6,147 mm)
• Small tubes	76: 2+1⁄2 in (64 mm)
• Large tubes	24: 5+1⁄2 in (140 mm)
Boiler pressure	200 psi (1,379 kPa)
Safety valve	Ross Pop
Heating surface:
• Firebox	123 sq ft (11.4 m2)
• Tubes	1,700 sq ft (160 m2)
• Arch tubes	16 sq ft (1.5 m2)
• Total surface	1,839 sq ft (170.8 m2)
Superheater:;
• Heating area	♠♥♣♦ʘ 404 sq ft (37.5 m2); ʘ 390 sq ft (36 m2)
Cylinders	Two
Cylinder size	21 in (533 mm) bore; 26 in (660 mm) stroke
Valve gear	Walschaerts
Valve type	Piston
Couplers	AAR knuckle
Tractive effort
Performance figures
Tractive effort	31,850 lbf (141.7 kN) @ 75%
Operators
Career
Operators	South African Railways; Rhodesia Railways; Caminho de Ferro de Benguela; Nkana Copper Mines; Wankie Colliery
Class	SAR Class 19D; RR 19th, 19B, 19C class; CFB 11th Class
Number in class	268
Numbers	SAR 2506-2545, 2626-2770, 3321-3370; CFB 401-406; RR 316–336; Nkana 107-108 (RR 337–338); WCC 1-4
Nicknames	Dolly
Delivered	1937–1953
First run	1937

The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.

Between 1937 and 1949, the South African Railways placed 235 Class 19D steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Between 1951 and 1955, 33 more were built for other operators like the Rhodesia and Angolan railways and the Nkana and Wankie mines, which makes the Class 19D the most numerous South African steam locomotive type ever built.^[1]^[2]^[3]^[4]

^ Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 93–96. ISBN 978-0-7153-5427-8.
^ Espitalier, T.J.; Day, W.A.J. (1946). The Locomotive in South Africa – A Brief History of Railway Development. Chapter VII – South African Railways (Continued). South African Railways and Harbours Magazine, November 1946. pp. 893-894.
^ Durrant, AE (1989). Twilight of South African Steam (1st ed.). Newton Abbott: David & Charles. p. 104. ISBN 0715386387.
^ Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 72–73. ISBN 0869772112.

[Holland_2-1] Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 93–96. ISBN 978-0-7153-5427-8.

[SAR&H_Nov_1946-2] Espitalier, T.J.; Day, W.A.J. (1946). The Locomotive in South Africa – A Brief History of Railway Development. Chapter VII – South African Railways (Continued). South African Railways and Harbours Magazine, November 1946. pp. 893-894.

[Durrant-3] Durrant, AE (1989). Twilight of South African Steam (1st ed.). Newton Abbott: David & Charles. p. 104. ISBN 0715386387.

[Paxton-Bourne-4] Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 72–73. ISBN 0869772112.

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South African Class 19D 4-8-2

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