South African type SH tender

South African type SH tender

Type SH tender on NGR Class B of 1904
Type and origin
Locomotive NGR Class A of 1905
NGR Class B of 1904
NGR Class B of 1906
Designer Natal Government Railways
(D.A. Hendrie)
Builder North British Locomotive Company
In service 1904-1905
Rebuilder South African Railways
Rebuild date c. 1930
Rebuilt to Type SK
Specifications
Configuration 2-axle bogies
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Length 22 ft 9 316 in (6,939 mm)
Wheel dia. 30 in (762 mm)
Wheelbase 15 ft 6 in (4,724 mm)
  Bogie 4 ft 6 in (1,372 mm)
Axle load 9 LT 10 cwt 2 qtr (9,678 kg)
  Front bogie 18 LT 18 cwt (19,200 kg)
  Rear bogie 19 LT 1 cwt (19,360 kg)
Weight empty 39,318 lb (17,834 kg)
Weight w/o 37 LT 19 cwt (38,560 kg)
Fuel type Coal
Fuel cap. 6 LT (6.1 t)
Water cap. 3,225 imp gal (14,700 l)
Stoking Manual
Couplers Drawbar & Bell link-and-pin
Drawbar & AAR knuckle (1950s)
Career
Operators Natal Government Railways
South African Railways
Numbers SAR 762-763, 1245-1288, 1440-1445

The South African type SH tender was a steam locomotive tender from the pre-Union era in Natal.

The Type SH tender first entered service in 1904, as tenders to the Class B 4-8-0 Mastodon type steam locomotives which were acquired by the Natal Government Railways in that year. These locomotives were designated Class 1 on the South African Railways in 1912.[1][2][3]

Manufacturers

Type SH tenders were built in 1904 by the North British Locomotive Company.[1]

The Natal Government Railways (NGR) placed fifty Class B Mastodon type locomotives in service in 1904. The locomotive and tender were designed by NGR Locomotive Superintendent D.A. Hendrie. Known as the Hendrie B, the first tender locomotive to enter service on the NGR in quantity, it replaced the NGR's fleet of tank locomotives on mainline working.[2][3]

The Type SH first entered service as tenders to these locomotives. More entered service the following year, as tenders to the NGR Class A Pacific type, or Hendrie A.[1][2][3][4]

In 1906, six of the Hendrie B engines were modified to a 4-8-0 Mountain type wheel arrangement.[1]

Classification

Since many tender types are interchangeable between different locomotive classes and types, a tender classification system was adopted by the South African Railways (SAR) and these tenders were designated Type SH.[1][3][5]

In the SAR years, tenders were numbered for the engines they were delivered with. In most cases, an oval number plate, bearing the engine number and tender type, would be attached to the rear end of the tender. During the classification and renumbering of locomotives onto the SAR roster in 1912, no separate classification and renumbering list was published for tenders, which should have been renumbered according to the locomotive renumbering list.[3][5]

The SAR grouped and renumbered the Hendrie A and Hendrie B locomotives into three separate Classes, according to wheel arrangement. Bearing in mind that tenders could and did migrate between engines, the Type SH tenders should have been numbered in the number blocks as shown.[1][3][5]

Letter codes

The first letter of the tender type indicates the classes of engines to which it can be coupled. The "S_" tenders could only be used with these three mentioned locomotive classes.[3]

The second letter indicates the tender's water capacity. The "_H" tenders had a capacity of 3,225 imperial gallons (14,700 litres).[3]

A number, when added after the letter code, indicates differences between similar tender types, such as wheelbase or coal bunker capacity.[3]

Modification and rebuilding

Modification

The original slatted upper sides of the Type SH tender's coal bunker were soon replaced by sheet-metal sides. These modifications were usually carried out during overhauls or refurbishing.

Many of these tenders were subsequently modified once again by shortening and raising the sides of the coal bunker, in effect making the coal at the rear of the bunker more easily accessible to the stoker and apparently without affecting the tender's coal capacity.

Rebuilding

Between 1912 and 1941, probably c. 1930, some of the Type SH tenders were rebuilt to Type SK tenders. The rebuilding resulted in a tender with a larger water tank and larger coal bunker.[2][3]

References

  1. 1 2 3 4 5 6 Holland, D.F. (1971). Steam Locomotives of the South African Railways, Volume 1: 1859-1910 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 99–101. ISBN 978-0-7153-5382-0.
  2. 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. 43.
  3. 1 2 3 4 5 6 7 8 9 10 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, 43.
  4. Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 51–52. ISBN 0869772112.
  5. 1 2 3 Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer’s Office, Pretoria, January 1912 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
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