South African type ZE tender

South African type ZE tender

Type ZE tender on SAR Class 7
Type and origin
Locomotive SAR Classes 7A, 7B & 7C
Designer South African Railways
Builder South African Railways
In service c. 1930
Rebuilt from Type ZC
Specifications
Configuration 2-axle bogies
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Length 23 ft 8 78 in (7,236 mm)
Wheel dia. 34 in (864 mm)
Wheelbase 16 ft 1 in (4,902 mm)
  Bogie 4 ft 7 in (1,397 mm)
Fuel type Coal
Fuel cap. 8 LT (8.1 t)
Water cap. 2,850 imp gal (13,000 l)
Stoking Manual
Couplers Drawbar & Bell link-and-pin
Drawbar & AAR knuckle (1950s)
Career
Operators South African Railways
Numbers SAR 949, 988-1068

The South African type ZE tender was a steam locomotive tender.

Type ZE tenders were rebuilt from Type ZC tenders which had entered service between 1896 and 1902. The rebuilding resulted in a tender with a larger water tank and larger coal bunker.[1][2]

Origin

The original 7th Class locomotive and tender were designed in 1892 at the Salt River works in Cape Town, under the supervision of H.M. Beatty, at the time the Cape Government Railways (CGR) Western System's Locomotive Superintendent.[1][2][3]

Type ZC tenders entered service as tenders to 7th Class locomotives between 1896 and 1913, built by Dübs and Company, Kitson and Company, Neilson and Company, Neilson, Reid and Company, North British Locomotive Company and Sharp, Stewart and Company.[1][2][3][4]

Rebuilding

Between 1912 and 1941, probably c. 1930, several of the Type ZC tenders which had entered service with the Class 7A in 1896, the Class 7B in 1900 and the Class 7C in 1902, were completely rebuilt by the South African Railways (SAR), by mounting a completely new upper structure on the existing underframe, with larger water tanks and a larger coal capacity. The water capacity was increased from 2,600 to 2,850 imperial gallons (11,800 to 13,000 litres) and the tender sides were built up to increase the coal capacity from 5 long tons 10 hundredweight (5.6 tonnes) to 8 long tons (8.1 tonnes). These rebuilt tenders had a more modern appearance, with smooth sides all the way to the top. They were designated Type ZE.[1][2]

Letter codes

Since many tender types are interchangeable between different locomotive classes and types, a tender classification system was adopted by the SAR.[2]

The first letter of the tender type indicates the classes of engines to which it can be coupled. The "Z_" tenders could be used with the following locomotive classes:[2]

The second letter indicates the tender's water capacity. The "_E" tenders had a capacity of between 2,800 and 2,855 imperial gallons (12,700 and 13,000 litres).[2]

A number, when added after the letter code, indicates differences between similar tender types, such as wheelbase or coal bunker capacity.[2]

References

  1. 1 2 3 4 South African Railways & Harbours/Suid Afrikaanse Spoorweë en Hawens (15 Aug 1941). Locomotive Diagram Book/Lokomotiefdiagramboek, 3'6" Gauge/Spoorwydte. SAR/SAS Mechanical Department/Werktuigkundige Dept. Drawing Office/Tekenkantoor, Pretoria. p. 41.
  2. 1 2 3 4 5 6 7 8 South African Railways & Harbours/Suid Afrikaanse Spoorweë en Hawens (15 Aug 1941). Locomotive Diagram Book/Lokomotiefdiagramboek, 2'0" & 3'6" Gauge/Spoorwydte, Steam Locomotives/Stoomlokomotiewe. SAR/SAS Mechanical Department/Werktuigkundige Dept. Drawing Office/Tekenkantoor, Pretoria. pp. 6a-7a, 41-42.
  3. 1 2 Holland, D.F. (1971). Steam Locomotives of the South African Railways, Volume 1: 1859-1910 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 41–44. ISBN 978-0-7153-5382-0.
  4. Pattison, R.G. (1997). The Cape Seventh Class Locomotives (1st ed.). Kenilworth, Cape Town: The Railway History Group. pp. 10–12, 25–33. ISBN 0958400946.
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