South African type MT1 tender

The South African type MT1 tender was a steam locomotive tender.

South African type MT1 tender
Type MT1 on Class 15AR, 1979
Type and origin
LocomotiveClass 12A, Class 19B, Class 19C, Class 19D
DesignerSouth African Railways
BuilderSouth African Railways
In service1945-1948
Rebuilt fromType MT
Specifications
Configuration2-axle bogies
Gauge3 ft 6 in (1,067 mm) Cape gauge
Length27 ft 5+38 in (8,366 mm)
Wheel dia.34 in (864 mm)
Wheelbase20 ft 5 in (6,223 mm)
 • Bogie6 ft 2 in (1,880 mm)
Axle load16 LT 17 cwt 2 qtr (17,150 kg)
 • Front bogie33 LT 10 cwt (34,040 kg)
 • Rear bogie33 LT 15 cwt (34,290 kg)
Weight empty61,520 lb (27,910 kg)
Weight w/o67 LT 5 cwt (68,330 kg)
Fuel typeCoal
Fuel cap.13 LT (13.2 t)
Water cap.6,000 imp gal (27,300 L)
StokingManual
CouplersDrawbar & AAR knuckle
Career
OperatorsSouth African Railways

Type MT1 tenders were modified Type MT tenders with enlarged coal bunkers. The original Type MT tenders entered service on the South African Railways between 1928 and 1945.[1][2][3]

Origin

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Type MT tenders were built between 1928 and 1945 by Berliner Maschinenbau, Borsig Lokomotiv Werke, Henschel and Son, Friedrich Krupp AG, North British Locomotive Company, Robert Stephenson and Hawthorns, and Škoda Works as tenders to the Classes 12A, 19B, 19C and 19D 4-8-2 Mountain type steam locomotives which were placed in service by the South African Railways (SAR) during that period.[1][2][3]

Rebuilding

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Between 1945 and 1948, several of these tenders were reclassified to Type MT1 after being modified to increase the coal capacity by extending the top of the coal bunker rearwards, to the extent that the raised part of the tender sides are approximately three-quarters of the tender's length.[2][3]

Characteristics

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The rebuilt tender had a coal capacity which had been increased from 12 long tons (12.2 tonnes) to 13 long tons (13.2 tonnes). Its water capacity remained the same at 6,000 imperial gallons (27,300 litres).[2][3]

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 "M_" tenders could be used with the locomotive classes as shown, 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 "_T" tenders had a capacity of between 5,587 and 6,000 imperial gallons (25,400 and 27,300 litres; 6,710 and 7,210 US gallons).[3]

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

Illustration

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References

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  1. ^ a b Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. pp. 38–40, 67–71, 93–96. ISBN 978-0-7153-5427-8.
  2. ^ a b c d 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. pp. 27, 45.
  3. ^ a b c d e f g 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, 21-21a, 27, 45.