CGR No. NG 1 to 3
| CGR No. NG 1–3 | |
|---|---|
 CGR No. NG 1–3
|
|
| Numbering: | SAR: NG 22-24, 35 |
| Number: | 3 + 1 |
| Manufacturer: | Baldwin |
| Year of construction (s): | 1902, 1911 |
| Retirement: | 1926 |
| Type : | 1'C n2 |
| Gauge : | 610 mm |
| Length over coupling: | 13,354 mm |
| Fixed wheelbase: | 2,134 mm |
| Total wheelbase: | 3,912 mm |
| Service mass: | 19.9 t |
| Service mass with tender: | 41.0 t |
| Friction mass: | 17.6 t |
| Wheel set mass : | 5.9 t |
| Driving wheel diameter: | 838 mm |
| Cylinder diameter: | 298 mm |
| Piston stroke: | 406 mm |
| Boiler overpressure: | 124.0 N / cm² |
| Grate area: | 0.71 m² |
| Radiant heating surface: | 3.75 m² |
| Tubular heating surface: | 35.39 m² |
| Train brake: | no |
The vehicles with the numbers NG 1 to 3 of the Cape Government Railways (CGR) were steam locomotives with the wheel arrangement 1'C ( Mogul ) for 610 mm narrow gauge .
history
The locomotives were procured in 1902 for the Hopefield Railway , which was under construction . They were among the first 610 mm narrow-gauge locomotives in South Africa (along with types A and C of the Avontuur Railway ). A structurally identical fourth locomotive was put into service by the South African Railways (SAR) in 1911 .
The locomotives supplied by Baldwin were typically American designs with an external bar frame, internal Stephenson control and horizontally arranged cylinders with flat slide valves. They were similar to locomotives that Baldwin had built for narrow-gauge routes in Maine .
The locomotives were already used during the construction of the Hopefield Railway and performed all services until the line was converted to Cape Gauge, and were later supplemented by a Type A, Type B and NG 6 . After their retirement in 1926, they were scrapped; no copy has survived.
numbering
Originally the locomotives only had numbers 1 to 3; photographs with the numbers 01 to 03 also exist. Unlike the locomotives of the Avontuur Railway, which is also part of the CGR and where several locomotive types were in use, they were not given a class designation.
In order to avoid confusion with the equally numbered locomotives of the Avontuur Railway and the Kapspur locomotives, the numbers 1 to 3 were later prefixed with an NG for "narrow gauge" (the locomotives of the Avontuur Railway were given completely new numbers).
When the CGR became part of the SAR and the CGR machines were combined with the narrow-gauge locomotives from Natal and Transvaal in a numbering plan, the locomotives of the Hopefield Railway were given the numbers NG 22-24. The fourth specimen, procured by SAR a little later, was classified as NG 35. The SAR did not initially introduce class designations for narrow-gauge locomotives; this only happened in the late 1920s, when the Hopefield locomotives were already retired.
literature
- Sydney M. Moir: Twenty-Four Inches Apart. The two-foot gauge railways of The Cape of Good Hope. 2nd edition (revised). Janus, Kempton Park 1981, ISBN 0-620-05460-3 .
- Leith Paxton, David Bourne: Locomotives of the South African Railways. A Concise Guide. C. Strui (Pty) Ltd., Cape Town 1985, ISBN 0-86977-211-2 .