| South African Class NG G14 2-6-2+2-6-2 | |
|---|---|
| Class NG G14 84, circa 1931 | |
| Power type | Steam |
| Designer | Hannoversche Maschinenbau AG South African Railways |
| Builder | Hannoversche Maschinenbau AG |
| Serial number | 10747[1] |
| Model | Class NG G14 |
| Build date | 1930 |
| Total produced | 1 |
| Configuration | 2-6-2+2-6-2 "Double Prairie" Garratt |
| Gauge | 2 ft (610 mm) |
| Leading wheel diameter |
21 in (533 mm) |
| Driver diameter | 30 in (762 mm) |
| Trailing wheel diameter |
21 in (533 mm) |
| Wheelbase | Total: 40 ft 6 in (12.344 m) Engine units: 5 ft 9 in (1.753 m) coupled 13 ft 3 in (4.039 m) total |
| Length | 46 ft 2.375 in (14.081 m) |
| Height | 10 ft (3.048 m) |
| Frame | Bar frame, 21 ft (6.401 m) between pivot centres |
| Axle load | 4 long tons (4.1 t) on 4th driver |
| Weight on drivers | 24.1375 long tons (24.5 t) |
| Locomotive weight | 37.7375 long tons (38.3 t) w/o |
| Fuel type | Coal |
| Fuel capacity | 2 long tons (2.0 t) |
| Water capacity | 800 imp gal (3,600 l) front 200 imp gal (910 l) rear |
| Boiler | 3 ft 6.375 in (1.076 m) int dia 8 ft 5.875 in (2.588 m) int length 5 ft 3 in (1.600 m) pitch |
| Boiler pressure | 180 psi (1,240 kPa) |
| Firegrate area | 10.5 sq ft (0.975 m2) |
| Heating surface: Tubes |
73 tubes 1.75 in (44.5 mm) ext dia 10 tubes 5.25 in (133 mm) ext dia 378.5 sq ft (35.164 m2) |
| Heating surface: Firebox |
45 sq ft (4.181 m2) |
| Heating surface: Total |
423.5 sq ft (39.344 m2) |
| Superheater area | 97.5 sq ft (9.058 m2) |
| Cylinders | Four |
| Cylinder size | 9 in (229 mm) bore 16 in (406 mm) stroke |
| Valve gear | Walschaerts |
| Tractive effort | 11,664 lbf (51.9 kN) at 75% boiler pressure[2] |
| Career | South African Railways |
| Class | Class NG G14 |
| Number in class | 1 |
| Number | 84 |
| Delivered | 1931 |
| First run | 1931 |
| Withdrawn | 1952 |
| Disposition | Retired |
In 1931 the South African Railways placed a single light Class NG G14 Garratt articulated steam locomotive with a 2-6-2+2-6-2 wheel arrangement in service.[3]
Contents |
The locomotive was built for the South African Railways (SAR) by Hannoversche Maschinenbau AG (Hanomag) in 1930. It was only slightly larger than the Class NG G12, the smallest Garratt to ever enter service on the SAR. Upon delivery it was classified as Class NG G14 and allocated number NG84.[2][3]
It had a 2-6-2+2-6-2 "Double Prairie" wheel arrangement like all the narrow gauge SAR Garratts except the first, the Class NG G11, which had a 2-6-0+0-6-2 wheel arrangement. It was very similar to the predecessor Class NG G12, but it had cylinders with a 0.5 inches (12.7 millimetres) larger bore which not only resulted in more power, but also an increase in axle loading. Like the Class NG G12, it also had an outside bar frame and a round top firebox, and it was superheated.[3]
The Class NG G14 was placed in service on the new narrow gauge line from Fort Beaufort to Seymour, where it became stable mate to Class NG G12 number 57. Its service life was similar to that of NG57, being occasionally temporarily assigned to narrow gauge branches in other areas of the country to assist with seasonal demands on those branches.[3]
In 1940, when the Seymour branch was regauged to Cape gauge, the Class NG G14 and Class NG G12 number 57 were both transferred to the Kakamas branch, where they joined Class NG G12 number 56 working out of Upington. All three remained there until 1949, when the Kakamas line was also widened to Cape Gauge and they were transferred to South West Africa (SWA) for a brief period.[3]
From there, number 56 was allocated to Port Shepstone in Natal and numbers 57 and 84 to Humewood Road in Port Elizabeth, where they all remained until they were withdrawn from service in 1952.[3]
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