NGR Reid ten-wheeler

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NGR Reid ten-wheeler
SAR classes H / H1 / H2
NGR class C No. 171 approx. 1903, SAR class H No. 253
NGR class C No. 171 approx. 1903, SAR class H No. 253
Numbering: SAR: 222-324
Number: 136
Manufacturer: Dübs , North British , Neilson Reid
Year of construction (s): 1899-1903
Retirement: until 1977
Type : 2'E1 '(2'D1') n2t
Gauge : 1067 mm ( cape track )
Length over coupling: 11,430 mm
Service mass: 69.9 (69.1) t
Wheel set mass : 12.4 (13.2) tons
Driving wheel diameter: 1,143 mm
Cylinder diameter: 483 mm
Piston stroke: 686 mm
Boiler overpressure: 120.6 N / cm²
Grate area: 1.96 m²
Train brake: Suction air brake

The vehicles of the Natal Government Railways (NGR) called Reid ten-wheelers were tank locomotives with a 2'E1 ' wheel arrangement.

With the requirement to achieve at least one and a half times the tensile force of type Dübs A , G. Reid, the then chief engineer of the NGR, designed a locomotive with the very rare 2'E1 'wheel arrangement, i.e. with a leading bogie , five coupling axles and a trailing axle . By enlarging the boiler and cylinder dimensions as well as increasing the boiler pressure and the axle load compared to Dübs A , the specification could be met.

So that the locomotives could also drive through tighter curves, the wheels of the first and last coupling wheel sets had no flanges . For a five-way coupled locomotive, the drive on the second coupling axle was unusual; normally the middle (third) axle was driven.

Between 1899 and 1903 Dübs and North British built a total of 101 units. According to G. Reid, the locomotives were referred to as Reid ten-wheelers , with ten referring to the number of driven wheels, while ten-wheeler locomotives with the axle arrangement 2'C, i.e. a total of ten wheels, are usually designated.

The locomotives were used on the main line, because the NGR only procured tender locomotives from 1904 onwards. Many of the Reid ten-wheelers stayed on the main line even after the appearance of the tender locomotives, while others performed replenishment service on inclines or were shunting.

In 1902, towards the end of the Second Boer War , the Imperial Military Railways ordered 35 locomotives of the same design. They were supplied by Dübs and Neilson Reid and differed from the NGR machines by a closed cab rear wall. After the war these locomotives came to the Central South African Railways (CSAR). There it was criticized that the range was too short, and from 1905 29 of them were converted to tender locomotives with a 2'D wheel arrangement (see SAR class 13 ).

The remaining six locomotives were converted by removing the last coupling axle and closing the corresponding openings in the frame, so that 2'D1 'locomotives with a slightly higher axle load were created (brackets in the table opposite). The NGR also began to convert their locomotives accordingly, as they were increasingly used in shunting services, where they tended to derail on the switches and narrower radii of the marshalling yards.

In 1910, SAR 93 took over not yet converted NGR locomotives as class H (no. 232-324), five converted NGR locomotives as class H2 (no. 227-231) and five of the six CSAR locomotives as class H1 (no. 222-226). By 1922, all class H locomotives were converted into class H2.

The locomotives of classes H1 and H2 were used in shunting throughout South Africa. Some were able to keep in operation for a relatively long time because they could not be replaced by more modern locomotives in some areas of application due to their comparatively low axle load. The last copies were not retired until 1977.

At least three copies (No. 264, 314 and 330) have been preserved as monument or museum locomotives. No. 330 is in the Outeniqua Railway Museum in George .

  • Ex IMR Reid Ten-wheeler No. 245 (4-10-2T)
    Ex CSAR-Class E No. 245 ( 4-8-2T ) (after conversion)
    SAR-Class H1 No. 225, circa 1912

  • SAR class H2 4-8-2T , ex NGR class C 4-8-2T, modernized Reid tenwheeler, circa 1950

literature

  • 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 .

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