South African Class 19D 4-8-2

South African Class 19D 4-8-2

Umgeni Steam Railway's no. 2685, 30 July 2006

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 AG Borsig Lokomotiv Werke Škoda Works Robert Stephenson & Hawthorns North British Locomotive Company Henschel and Son Serial number See table Model Class 19D Build date 1937–1953 Total produced 268

Specifications Configuration 4-8-2 (Mountain) 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)  • 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) Wheel 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) 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  • Firegrate 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 1,839 sq ft (170.8 m2)  • Tubes 1,700 sq ft (160 m2)  • Arch tubes 16 sq ft (1.5 m2)  • Firebox 123 sq ft (11.4 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

Performance figures Tractive effort 31,850 lbf (141.7 kN) @ 75%

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

External video

Riding the Reverses with Class 19D 3323 on the Barkly East Branch Class 19D no. 3323, driven by Boepie Schutte, at work on the Barkly East branch on 26 May 2001, as part of a Steam Safaris tour. The Union Limited was staged at Lady Grey while the Class 19D hauled a mixed train as far as Ulrie and back. The video shows Reverses 1 through 6, plus some of the magnificent scenery that the line traverses. (Time 15:00)

External video

South African Steam: 19D Ceres and Porterville Branch Line Class 19D no. 3323 at work on a mixed train from Wolseley to Prince Alfred Hamlet and return on 28 May 2002. Class 26 no. 3450, The Red Devil, shunting empty wagons at Wolseley before a run through towards Dal Josafat. Class 19D no. 3321 and 3323 on the Union Limited from Hermon to Porterville. (Time 17:21)

External video

South African Steam: 10CR & 19D Loraine Gold Mine Open Day August 1997 Class 10CR no. 771 and Class 19D numbers 2765 and 3369, working at the Lorraine Gold Mine in the Free State, August 1997. (Time 8:42)

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.

The Class 19D 4-8-2 steam locomotive was the final development of the Class 19 family of locomotives. At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the original basic design of the Class 19 was done in the late 1920s by Test Engineer M.M. Loubser, who was himself later to serve as the CME from 1939 to 1949.

The final development of the Class was done in 1937 by W.A.J. Day, CME from 1936 to 1939. The Class 19D was a revised version of the Class 19C, with piston valves and Walschaerts valve gear instead of Rotary Cam Poppet valve gear.

Between 1937 and 1955, 268 Class 19D locomotives were built in seven batches by six locomotive manufacturers in Czechoslovakia, Germany and the United Kingdom and delivered to the SAR and several other operators in Southern Africa.

The Class 19D, nicknamed Dolly, was very similar to its predecessor Class 19C, but Day specified piston valves and Walschaerts valve gear instead of Rotary Cam Poppet valve gear. The cylinders were redesigned with straighter steam ports, while the valve gear itself was revamped with a longer steam lap and greater valve travel. In all other respects they were identical to the Class 19C. The last five locomotives of the first batch from Krupp, numbers 2521 to 2525, were fitted with exhaust steam injectors.

The cylinders were of the combined type, being cast in two identical and interchangeable sections, each made up of one cylinder and half of the smokebox saddle. They are of cast iron and have liners fitted. The design of the steam passages provided for a large cross-sectional area for both live and exhaust steam.

All coupled wheels were flanged. The axle boxes of the leading and trailing wheels were equipped with roller bearings, while the solid bronze coupled wheel axle boxes were soft grease-lubricated. Soft grease lubrication was used throughout for the motion gear, except the piston rods, valve spindles and main crossheads, which were oil-lubricated. Two four-feed sight lubricators, arranged in the cab, supplied oil to the steam chests and cylinders.