The South African type MT tender was a steam locomotive tender.
Type MT tenders entered service between 1928 and 1945, as tenders to the
Classes 12A,
19B,
19C and
19D Mountain type steam locomotives which were placed in service by the
South African Railways during that period.
[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.][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.]
Manufacturers
Type MT tenders were built between 1928 and 1945 by
Berliner Maschinenbau
Berliner Maschinenbau AG was a German manufacturer of locomotives.
The factory was founded by Louis Victor Robert Schwartzkopff on 3 October 1852 as ''Eisengießerei und Maschinen-Fabrik von L. Schwartzkopff'' in Berlin.
History
The facto ...
,
Borsig Lokomotiv Werke,
Henschel and Son,
Friedrich Krupp AG,
North British Locomotive Company
The North British Locomotive Company (NBL, NB Loco or North British) was created in 1903 through the merger of three Glasgow locomotive manufacturing companies; Sharp, Stewart and Company (Atlas Works), Neilson, Reid and Company (Hyde Park Wor ...
(NBL),
Robert Stephenson and Hawthorns, and
Å koda Works
The Škoda Works ( cs, Škodovy závody, ) was one of the largest European industrial conglomerates of the 20th century, founded by Czech engineer Emil Škoda in 1859 in Plzeň, then in the Kingdom of Bohemia, Austrian Empire. It is the predece ...
.
The
South African Railways (SAR) placed 67 Class 12A 4-8-2 Mountain type locomotives in service between 1919 and 1929, built by North British and Henschel. The engines were designed by D.A. Hendrie, Chief Mechanical Engineer (CME) of the SAR from 1910 to 1922. The locomotives were delivered in five batches and with two tender types, the Type MP1 in 1919 and 1921 and the Type MT in 1928 and 1929. The design of the Type MT tender was by Hendrie's successor, Colonel F.R. Collins
DSO, the CME from 1922 to 1929.
[Espitalier, T.J.; Day, W.A.J. (1945). ''The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued).'' South African Railways and Harbours Magazine, October 1945. pp. 779-783.]
The official SAR tender diagrams show the Type MT tender as having first entered service in 1919, but builder's pictures of the North British-built Class 12A no. 1520 of 1919 and no. 2111 of 1921 show them with
Type MP1 tenders. Builder's pictures of Henschel-built Class 12A no. 1543 of 1928 and North British-built no. 2131 of 1929 show the engines with Type MT tenders. It would therefore appear that Type MT tenders first entered service in 1928, not 1919.
[Espitalier, T.J.; Day, W.A.J. (1946). ''The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued).'' South African Railways and Harbours Magazine, Jul 1946. pp. 541-542.]
Characteristics
The Type MT tender had a coal capacity of , a water capacity of and an axle loading of .
Locomotives
Four locomotive classes, built by seven manufacturers, were delivered new with Type MT tenders, which were numbered for their engines in the number ranges as shown. An oval number plate, bearing the engine number and often also the tender type, was attached to the rear end of the tender. In addition, eleven spare Type MT tenders were built new and numbered in the range from N47 to N57.
* 1928 and 1929:
Class 12A, numbers 1540 to 1550, 2103 to 2110 and 2126 to 2138.
* 1930:
Class 19B, numbers 1401 to 1414.
* 1935:
Class 19C, numbers 2435 to 2484.
* 1937 to 1945:
Class 19D, numbers 2506 to 2545 and 2626 to 2770.
The Classes 19B and 19C and most of the Class 19D were delivered with these high-capacity tenders, even though the axle loading of these tenders exceeded the permissible limits on the branchlines for which the Classes 19 were intended. Upon delivery, their new Type MT tenders were exchanged for the smaller modified
Type MP1 tenders from many of the reboilered mainline locomotives. The Type MP1 had a lighter axle load of and was therefore more suitable for branchline work. This policy was followed with all the Classes 19B, 19C and 19D upon delivery, except the last batch of Class 19D which were delivered with
Type MX torpedo tenders.
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 in some cases, engine drawbars and intermediate emergency chains had to be replaced or adjusted to suit the target locomotive.
*
Class 12,
Class 12A and
Class 12B.
*
Class 14,
Class 14A and
Class 14B
Class or The Class may refer to:
Common uses not otherwise categorized
* Class (biology), a taxonomic rank
* Class (knowledge representation), a collection of individuals or objects
* Class (philosophy), an analytical concept used differently ...
.
*
Class 15 and
Class 15A.
*
Class 16,
Class 16A,
Class 16B and
Class 16C.
*
Class 19 Class 19 may refer to:
* Caledonian Railway 19 Class, 0-4-4T steam locomotives
* Belgian Railways Class 19, electric locomotives
* British Rail Class 19
Class 19 is the name given to an experimental railway locomotive that was constructed using ...
,
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 .
A number, when added after the letter code, indicates differences between similar tender types, such as function, wheelbase or coal bunker capacity.
Modifications
On the original Type MT tenders, as built, the raised part of the tender sides are approximately two-thirds of the tender's length. Several of these tenders were reclassified after being modified by enlarging their coal bunkers. Those which had their bunkers enlarged to a coal capacity were reclassified to
Type MT1, while those which had their bunkers enlarged to a coal capacity were reclassified to
Type MT2.
Illustration
Builder's pictures of four of the Class 12A locomotive batches show them with the two tender types with which they were delivered, Type MP1 until 1921 and Type MT from 1928. The last three pictures serve to illustrate the difference in appearance between the Types MT, MT1 and MT2 versions.
File:Class 12A no. 1520.jpg, Type MP1 on NBL-built no. 1520, c. 1919
File:Class 12A no. 2111.jpg, Type MP1 on NBL's no. 2111, c. 1921
File:Class 12A no. 1543.jpg, Type MT on Henschel-built no. 1543, c. 1928
File:Class 12A no. 2131.jpg, Type MT on NBL-built no. 2131, c. 1929
File:Type MT Tender No. 2737 02.jpg, Type MT on Class 19D, 2012.
File:SAR Class 15AR 1855 Klipplaat 160479.jpg, Type MT1 on Class 15AR, 1979
File:SAR Class 15AR 1850 (4-8-2).JPG, MT2 no. 2723 on 15AR no. 1850, 2009
References
{{Locomotives of South Africa
MT