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 Locomotive Class 12A, Class 19B, Class 19C, Class 19D Designer South African Railways Builder South African Railways In service 1945-1948 Rebuilt from Type MT

Specifications Configuration 2-axle bogies Gauge 3 ft 6 in (1,067 mm) Cape gauge Length 27 ft 5+3⁄8 in (8,366 mm) Wheel dia. 34 in (864 mm) Wheelbase 20 ft 5 in (6,223 mm)  • Bogie 6 ft 2 in (1,880 mm) Axle load 16 LT 17 cwt 2 qtr (17,150 kg)  • Front bogie 33 LT 10 cwt (34,040 kg)  • Rear bogie 33 LT 15 cwt (34,290 kg) Weight empty 61,520 lb (27,910 kg) Weight w/o 67 LT 5 cwt (68,330 kg) Fuel type Coal Fuel cap. 13 LT (13.2 t) Water cap. 6,000 imp gal (27,300 L) Stoking Manual Couplers Drawbar & AAR knuckle

Career Operators South African Railways

Main article: South African steam locomotive tenders

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.

Origin

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.

Rebuilding

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.

Characteristics

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).

Classification letters

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.

• Class 12, Class 12A and Class 12B.
• Class 14, Class 14A and Class 14B.
• Class 15 and Class 15A.
• Class 16, Class 16A, Class 16B and Class 16C.
• Class 19, Class 19A, Class 19B, Class 19C and Class 19D.
• Class 20.
• Class 24.
• Class MC1, Class MH and Class MJ.
• Class S2.

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).

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

Illustration

• 
  Type MT1 on Class 12R, 1979
• 
  Type MT1 on Class 12R, 1979