South African type TJ tender

South African type TJ tender

Type TJ tender on NGR Class B of 1909
Type and origin
♠ NGR Class B of 1909
NGR Classes A & B of 1910
Locomotive NGR Class A of 1910
NGR Class B of 1909
NGR Class B of 1910
Designer Natal Government Railways
(D.A. Hendrie)
Builder Natal Government Railways
North British Locomotive Company
In service 1909-1910
Rebuilder South African Railways
Rebuild date c. 1930
Rebuilt to Type TL
Specifications
Configuration 2-axle bogies
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Length ♠ 24 ft 2 78 in (7,388 mm)
24 ft 2 58 in (7,382 mm)
Wheel dia. 30 in (762 mm)
Wheelbase 16 ft 6 in (5,029 mm)
  Bogie 4 ft 6 in (1,372 mm)
Axle load 10 LT 5 cwt (10,410 kg)
  Front bogie 20 LT 1 cwt (20,370 kg)
  Rear bogie 20 LT 10 cwt (20,830 kg)
Weight empty 42,392 lb (19,229 kg)
Weight w/o 40 LT 11 cwt (41,200 kg)
Fuel type Coal
Fuel cap. 6 LT (6.1 t)
Water cap. 3,500 imp gal (15,900 l)
Stoking Manual
Couplers Drawbar & Bell link-and-pin
Drawbar & AAR knuckle (1950s)
Career
Operators Natal Government Railways
South African Railways
Numbers SAR 765-766, 1289-1309, 1446-1450

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

The Type TJ tender first entered service in 1909, as tenders to the first five Class B 4-8-2 Mountain type steam locomotives, which were acquired by the Natal Government Railways in that year. These locomotives were designated Class 3 on the South African Railways in 1912.[1][2][3]

Manufacturers

Type TJ tenders were built in 1909 and 1910 by the North British Locomotive Company (NBL) and the Natal Government Railways (NGR).[1]

The NGR placed its first five Class B Mountain type locomotives in service in 1909. The locomotive and tender were designed by NGR Locomotive Superintendent D.A. Hendrie and built by NBL. Known as the Hendrie D, but officially designated Class B on the NGR, it was the first true Mountain type locomotive in the word.[2][3]

The Type TJ first entered service as tenders to these five locomotives. More entered service the following year, as tenders to the 21 NGR Class B Mastodon type locomotives of 1910, known as the Improved Hendrie B, and two NGR Class A Pacific type Hendrie A locomotives, which were built in the Durban workshops of the NGR.[1][2][3][4]

Another 25 Class B Mountain type locomotives entered service on the NGR in 1911, but these were delivered with Type TM tenders, which had a larger coal and water capacity.[3]

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 TJ.[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]

In 1912, the SAR grouped and renumbered these NGR Classes A and B locomotives into three separate Classes, according to wheel arrangement. Bearing in mind that tenders could and did migrate between engines, the Type TJ 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 "T_" tenders could be used with the locomotive classes as shown below, although engine drawbars and intermediate emergency chains had to be replaced or adjusted to suit the target locomotive in some cases.[3]

The second letter indicates the tender's water capacity. The "_J" tenders had a capacity of 3,500 imperial gallons (15,900 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

Builder's works pictures of most of these locomotives show them with the original slatted upper sides on the tender. Pictures of most of these locomotives in service, however, show them with a Type TJ tender with built-up sheet-metal sides to the coal bunker.[1][3][4]

Rebuilding

Between 1912 and 1941, probably c. 1930, some Type TJ tenders were rebuilt to Type TL. The rebuilding resulted in a tender with a larger water tank and larger coal bunker. The Type TL had a more modern appearance, with smooth sides all the way to the top.[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. 99–104. 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 11 12 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. 1 2 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 34–36. 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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