| South African Class NG G11 2-6-0+0-6-2 |
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NG G11 no. 54 Solly at Chelsea on 3 April 1990 |
| Type and origin |
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♠ Saturated steam locomotives
♥ Superheated steam locomotives | | Power type | Steam |
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| Designer | Beyer, Peacock & Company |
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| Builder | Beyer, Peacock & Company |
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| Serial number | 5975–5977, 6199, 6200 |
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| Model | Class NG G11 |
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| Build date | 1919–1925 |
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| Total produced | 5 |
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| Specifications |
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Configuration:
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| • Whyte | 2-6-0+0-6-2 (Double Mogul) |
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| • UIC | ♠ 1'C+C1'n4 – ♥ 1'C+C1'h4 |
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| Driver | 3rd & 4th coupled axles |
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| Gauge | 2 ft narrow gauge |
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| Leading dia. | 21 in (533 mm) |
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| Coupled dia. | 30 in (762 mm) |
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| Wheelbase | ♠ 39 ft (11,887 mm)
♥ 39 ft 9 in (12,116 mm) |
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| • Engine | 10 ft 3 in (3,124 mm) each |
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| • Coupled | 5 ft 9 in (1,753 mm) each |
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| Pivot centres | ♠ 22 ft (6,706 mm)
♥ 22 ft 9 in (6,934 mm) |
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Length:
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| • Over couplers | ♠ 44 ft 7+1⁄2 in (13,602 mm)
♥ 45 ft 5 in (13,843 mm) |
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| Height | 10 ft 4 in (3,150 mm) |
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| Frame type | Plate |
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| Axle load | ♠ 6 LT 3 cwt 3 qtr (6,287 kg)
♥ 6 LT 11 cwt (6,655 kg) |
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| • Leading | ♠ 4 LT 7 cwt 1 qtr (4,433 kg) front
4 LT 5 cwt (4,318 kg) rear
♥ 4 LT 16 cwt (4,877 kg) front
4 LT 15 cwt 3 qtr (4,864 kg) rear |
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| • 1st coupled | ♠ 6 LT (6,096 kg)
♥ 6 LT 9 cwt 2 qtr (6,579 kg) |
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| • 2nd coupled | ♠ 6 LT 1 cwt 2 qtr (6,172 kg)
♥ 6 LT 8 cwt 2 qtr (6,528 kg) |
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| • 3rd coupled | ♠ 5 LT 17 cwt (5,944 kg)
♥ 6 LT 4 cwt 3 qtr (6,338 kg) |
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| • 4th coupled | ♠ 6 LT 0 cwt 2 qtr (6,122 kg)
♥ 6 LT 8 cwt 2 qtr (6,528 kg) |
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| • 5th coupled | ♠ 6 LT 3 cwt 3 qtr (6,287 kg)
♥ 6 LT 11 cwt (6,655 kg) |
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| • 6th coupled | ♠ 6 LT (6,096 kg)
♥ 6 LT 10 cwt 3 qtr (6,642 kg) |
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| Adhesive weight | ♠ 36 LT 2 cwt 3 qtr (36,720 kg)
♥ 39 LT 3 cwt (39,780 kg) |
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| Loco weight | ♠ 44 LT 15 cwt (45,470 kg)
♥ 48 LT 4 cwt 3 qtr (49,010 kg) |
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| Fuel type | Coal |
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| Fuel capacity | 2 LT 10 cwt (2.5 t) |
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| Water cap. | 970 imp gal (4,410 L) front
380 imp gal (1,730 L) rear |
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| Firebox: | |
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| • Type | Belpaire |
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| • Grate area | ♠ 19.3 sq ft (1.79 m2)
♥ 19.5 sq ft (1.81 m2) |
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Boiler:
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| • Pitch | 5 ft 3 in (1,600 mm) |
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| • Diameter | 4 ft 2 in (1,270 mm) |
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| • Tube plates | 9 ft 3+3⁄8 in (2,829 mm) |
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| • Small tubes | ♠ 211: 1+3⁄4 in (44 mm)
♥ 115: 1+3⁄4 in (44 mm) |
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| • Large tubes | ♥ 13: 5+1⁄2 in (140 mm) |
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| Boiler pressure | 180 psi (1,241 kPa) |
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| Safety valve | Ramsbottom |
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| Heating surface: | |
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| • Firebox | ♠ 81 sq ft (7.5 m2)
♥ 80.6 sq ft (7.49 m2) |
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| • Tubes | ♠ 899 sq ft (83.5 m2)
♥ 660.9 sq ft (61.40 m2) |
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| • Total surface | ♠ 980 sq ft (91 m2)
♥ 741.5 sq ft (68.89 m2) |
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Superheater:
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| • Heating area | ♥ 141.5 sq ft (13.15 m2) |
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| Cylinders | Four |
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| Cylinder size | 10+1⁄2 in (267 mm) bore
16 in (406 mm) stroke |
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| Valve gear | Walschaerts |
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| Valve type | ♠ Slide – ♥ Piston |
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| Couplers | Bell-and-hook (Cape)
Johnston link-and-pin (Natal) |
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| Career |
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| Operators | South African Railways |
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| Class | Class NG G11 |
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| Number in class | 5 |
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| Numbers | ♠ NG51-NG53 – ♥ NG54-NG55 |
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| Delivered | 1919–1925 |
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| First run | 1919 |
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| Withdrawn | 1962–1974 |
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| Preserved | 3 |
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The South African Railways Class NG G11 2-6-0+0-6-2 of 1919 is a class of narrow gauge steam locomotives.
Between 1919 and 1925, the South African Railways (SAR) placed five Class NG G11 Garratt locomotives with a 2-6-0+0-6-2 Double Mogul type wheel arrangement in service on the Avontuur narrow gauge line through the Langkloof, and also in Natal. They were the first Garratt locomotives to enter service in South Africa.