South African type SH tender
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Type SH tender on NGR Class B of 1904
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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]
Contents
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]
- 1904: NGR Class B 4-8-0, SAR Class 1, numbers 1245 to 1288.
- 1904: NGR Class B 4-8-2, SAR Class 1B, numbers 1440 to 1445.
- 1905: NGR Class A 4-6-2, SAR Class 2, numbers 762 and 763.
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 Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value)..[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]
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SAR Class 1 1247 Masons Mill 290379.jpg
First modification Type SH on Class 1, 29 March 1979
-
Class 1 no. 1277.jpg
Second modification Type SH on Class 1, May 1977
References
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- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 2.3 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.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 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.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 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)
