| South African Class 17 4-8-0TT |
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SAR Class 17 no. 1432, circa 1930 |
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| Specifications |
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Configuration:
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| • Whyte | 4-8-0TT (Mastodon) |
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| • UIC | 2’Dn2t |
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| Driver | 2nd coupled axle |
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| Gauge | 3 ft 6 in (1,067 mm) Cape gauge |
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| Leading dia. | 25+3⁄4 in (654 mm) |
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| Coupled dia. | 39 in (991 mm) |
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| Tender wheels | 34 in (864 mm) |
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| Wheelbase | 44 ft 11+1⁄2 in (13,703 mm) |
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| • Engine | 19 ft 9 in (6,020 mm) |
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| • Leading | 5 ft (1,524 mm) |
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| • Coupled | 11 ft (3,353 mm) |
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| • Tender | 16 ft 1 in (4,902 mm) |
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| • Tender bogie | 4 ft 7 in (1,397 mm) |
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Length:
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| • Over couplers | 52 ft 2+1⁄2 in (15,913 mm) |
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| Height | 12 ft 2+1⁄2 in (3,721 mm) |
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| Frame type | Plate |
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| Axle load | 8 LT 10 cwt (8,636 kg) |
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| • Leading | 9 LT 6 cwt (9,449 kg) |
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| • 1st coupled | 8 LT 2 cwt (8,230 kg) |
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| • 2nd coupled | 8 LT 10 cwt (8,636 kg) |
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| • 3rd coupled | 8 LT 3 cwt (8,281 kg) |
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| • 4th coupled | 8 LT 3 cwt (8,281 kg) |
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| • Tender bogie | Bogie 1: 16 LT 15 cwt (17,020 kg)
Bogie 2: 17 LT 18 cwt (18,190 kg) |
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| Adhesive weight | 32 LT 18 cwt (33,430 kg) |
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| Loco weight | 42 LT 4 cwt (42,880 kg) |
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| Tender weight | 34 LT 13 cwt (35,210 kg) |
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| Total weight | 76 LT 17 cwt (78,080 kg) |
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| Tender type | 2-axle bogies or 3-axle |
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| Fuel type | Coal |
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| Fuel capacity | 5 LT 10 cwt (5.6 t) |
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| Water cap. | 1,358 imp gal (6,170 L) engine |
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| Tender cap. | 2,600 imp gal (11,800 L) tender |
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| Firebox: | |
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| • Type | Belpaire |
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| • Grate area | 24 sq ft (2.2 m2) |
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Boiler:
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| • Pitch | 7 ft (2,134 mm) |
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| • Diameter | 3 ft 10+3⁄4 in (1,187 mm) |
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| • Tube plates | 10 ft 10+1⁄8 in (3,305 mm) |
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| • Small tubes | 187: 1+3⁄4 in (44 mm) |
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| Boiler pressure | 160 psi (1,103 kPa) |
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| Safety valve | Ramsbottom |
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| Heating surface: | |
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| • Firebox | 62 sq ft (5.8 m2) |
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| • Tubes | 930 sq ft (86 m2) |
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| • Total surface | 992 sq ft (92.2 m2) |
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| Cylinders | Two |
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| Cylinder size | 17 in (432 mm) bore
21 in (533 mm) stroke |
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| Valve gear | Stephenson |
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| Valve type | Slide |
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| Couplers | Johnston link-and-pin
AAR knuckle (1930s) |
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| Career |
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| Operators | South African Railways |
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| Class | Class 17 |
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| Number in class | 21 |
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| Numbers | 1415–1435 |
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| Delivered | 1926-1929 |
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| First run | 1926 |
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| Withdrawn | 1961 |
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| The leading coupled axle had flangeless wheels |
The South African Railways Class 17 4-8-0TT of 1926 was a steam locomotive from the pre-Union era in the Natal Colony.
Between 1926 and 1929, to address a shortage of suitable shunting locomotives, the South African Railways rebuilt twenty-one Class A 4-8-2 Mountain type tank steam locomotives to Class 17 4-8-0 Mastodon type tank-and-tender locomotives.
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