EAR class 58
| EAR class 58 | |
|---|---|
| Numbering: | 5801-5818 |
| Number: | 18th |
| Manufacturer: | Beyer-Peacock |
| Year of construction (s): | 1949-1950 |
| Retirement: | 1970s |
| Type : | (2'D2 ') (2'D2') h4 (Garratt) |
| Gauge : | 1000 mm ( meter gauge ) |
| Service mass: | 189 t |
| Friction mass: | 95.5 t |
| Wheel set mass : | 11.9 t |
| Driving wheel diameter: | 1,371 mm |
| Cylinder diameter: | 419 mm |
| Piston stroke: | 660 mm |
| Boiler overpressure: | 152 N / cm² |
| Grate area: | 4.51 m² |
| Radiant heating surface: | 22.95 m² |
| Tubular heating surface: | 184 m² |
| Superheater area : | 44.3 m² |
| Water supply: | 27.3 m³ |
| Fuel supply: | 10.8 m³ heating oil |
| Train brake: | Air brake |
The class 58 locomotives of the East African Railways (EAR) were steam locomotives of the Garratt design .
history
The class 58 was a little changed further development of the proven class EC3 of the Kenya-Uganda Railway . The locomotives were ordered under the direction of the KUR, but before the delivery of the first copies, the KUR was incorporated into the EAR together with Tanganyika Railways in 1948 . Initially, the machines were to receive the KUR company numbers 89-106, but after the introduction of the new numbering scheme they were given the class designation 58 and the numbers 5801 to 5818, while the older EC3s were assigned to class 57 before the last copies were delivered.
Technically, the class 58 differed from the EC3 primarily in that it had a larger cylinder diameter; With a practically identical total weight, the coupling axle load and the heating surface were also slightly higher. Unlike the EC3, the class 58 was built from the start for a larger clearance profile, which is why it has a higher cab than the EC3. Another distinguishing feature is the more rounded steam dome .
In 1959 and 1960, all class 58 machines were converted to Giesl ejectors , which was externally recognizable by a long, narrow chimney. The increase in performance with simultaneous water and fuel savings was so clear that a distinction was made in the timetables between converted and non-converted locomotives. The good results meant that the EAR converted the Garratt locomotives of classes 57, 59 and 60 as well as some conventional locomotives accordingly in the following years .
The class 58 locomotives remained on the former KUR main line between Nairobi and Kampala throughout their service life . After the decommissioning of class 57, the exchangeable boilers and cylinders between the two classes were used to maintain class 58. The decommissioning took place around the mid-1970s; no copy has survived.
literature
- Anthony E. Durrant: Garratt locomotives of the world ("Garrat locomotives of the world"). Pawlak Verlag, Herrsching 1991, ISBN 3-88199-847-0 (reprint of the Basel edition 1984).
- Roeland Ramaer: Steam Locomotives of the East African Railways . David & Charles, London 1974, ISBN 0-7153-6437-5 (David & Charles locomotive studies).
