South African type XS tender

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

South African type XS tender
Type XS tender on CSAR Superheated Mallet
Type and origin
LocomotiveCSAR Superheated Mallet
DesignerAmerican Locomotive Company
BuilderAmerican Locomotive Company
In service1911
Specifications
Configuration2-axle bogies
Gauge3 ft 6 in (1,067 mm) Cape gauge
Length26 ft 1+14 in (7,957 mm)
Wheel dia.34 in (864 mm)
Wheelbase17 ft 11 in (5,461 mm)
 • Bogie4 ft 7 in (1,397 mm)
Axle load13 LT 16 cwt (14,020 kg) average
 • Bogie27 LT 12 cwt (28,040 kg) each
Weight empty51,248 lb (23,246 kg)
Weight w/o55 LT 4 cwt (56,090 kg)
Fuel typeCoal
Fuel cap.10 LT (10.2 t)
Water cap.5,000 imp gal (22,700 L)
StokingManual
CouplersDrawbar & Johnston link-and-pin
Career
OperatorsCentral South African Railways
South African Railways
NumbersSAR 1619-1627

Type XS tenders entered service in 1911, as tenders to the 2-6-6-2 Superheated Mallet type steam locomotives which were acquired by the Central South African Railways in that year. These locomotives were designated Class MF on the South African Railways in 1912.[1][2][3]

Manufacturer

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Type XS tenders were built in 1911 by the American Locomotive Company (ALCO).[1][2][3]

In 1911, the Central South African Railways (CSAR) placed nine 2-6-6-2 Mallet articulated compound steam locomotives in service, built by ALCO. These locomotives were designated Class MF on the South African Railways (SAR) in 1912. The Type XS entered service as tenders to these engines.[1][2][3]

Characteristics

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The tender had a coal capacity of 10 long tons (10.2 tonnes), a water capacity of 5,000 imperial gallons (22,700 litres) and an average maximum axle load of 13 long tons 16 hundredweight (14,020 kilograms).[2][3]

Locomotive

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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 often also the 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][4]

Only the first batch of nine Class MF locomotives of 1911 were delivered new with Type XS tenders. In 1912, they were renumbered in the SAR number range from 1619 to 1627.[2][3][4]

Classification letters

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Since many tender types are interchangeable between different locomotive classes and types, a tender classification system was adopted by the SAR. The first letter of the tender type indicates the classes of engines to which it could be coupled. The "X_" tenders could be used with the following locomotive classes:[3]

The second letter indicates the tender's water capacity. The "_S" tenders had a capacity of 5,000 imperial gallons (22,700 litres; 6,000 US gallons).[3]

References

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  1. ^ a b c Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 16–19. ISBN 978-0-7153-5427-8.
  2. ^ a b c d e 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. ^ a b c d e f g h 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. ^ a b 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)