SAR class GD
| SAR class GD | |
|---|---|
.jpg) Class GD Garratt, circa 1965
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| Numbering: | 2220-2223, 2228-2237 |
| Number: | 14th |
| Manufacturer: | Beyer-Peacock |
| Year of construction (s): | 1925-1926 |
| Retirement: | until 1968 |
| Type : | (1'C1 ') (1'C1') h4 (Garratt) |
| Gauge : | 1067 mm ( cape track ) |
| Length over coupling: | k. A. |
| Service mass: | 115.9 t |
| Friction mass: | 76.5 t |
| Wheel set mass : | 12.9 t |
| Driving wheel diameter: | 1155 mm |
| Impeller diameter: | k. A. |
| Cylinder diameter: | 381 mm |
| Piston stroke: | 610 mm |
| Boiler overpressure: | 124.1 N / cm² |
| Grate area: | 3.75 m² |
| Radiant heating surface: | 15.51 m² |
| Tubular heating surface: | 140.3 m² |
| Superheater area : | 33.4 m² |
| Train brake: | Suction air brake |
The vehicles of the class GD of the South African Railways (SAR) were articulated locomotives of the Garratt design . With an axle load of 12.9 t they were intended for branch line operation; the axis order was (1'C1 ') (1'C1').
The GD class was basically an enlarged version of the GC class . As with the latter, locomotives of the Modified Fairlie type were also procured on a trial basis in parallel to the GD class . These machines, designated as class FD , corresponded to class GD in all essential dimensions, so that it was possible for the railway to compare both types of joint with one another.
The class GD locomotives were used on various routes in the Cape Province , including in double traction on the pass between George and Oudtshoorn . In Natal they were deployed from Durban and Pietermaritzburg . Most recently, three of the locomotives were in service between Alicedale and Grahamstown until early 1968 .
literature
- AE Durrant: Garratt locomotives of the world. Birkhäuser, Basel et al. 1984, ISBN 3-7643-1481-8 .
