| South African type MY1 tender | |
| Locomotive: | Class S2 |
| Designer: | South African Railways (L.C. Grubb) |
| Builder: | Friedrich Krupp AG |
| Date: | 1952-1953 |
| Wheelarr: | 3-axle bogies |
| Bogies: | Buckeye |
| Wheeldiameter: | 340NaN0 |
| Wheelbase: | 24feet |
| Bogie: | 8feet |
| Axleload: | 8lt |
| Bogie 1: | 26lt |
| Bogie 2: | 26lt |
| Tenderworking: | 53lt |
| Fueltype: | Coal |
| Fuelcap: | 81NaN1 |
| Watercap: | 4200sigfig=3NaNsigfig=3 |
| Stoking: | Manual |
| Coupling: | Drawbar & AAR knuckle |
| Operator: | South African Railways |
| Fleetnumbers: | SAR 3701-3800 |
| Nicknames: | Torpedo |
See main article: article and South African steam locomotive tenders.
The South African type MY1 tender was a steam locomotive tender.
Type MY1 tenders entered service in 1952 and 1953, as tenders to the shunting steam locomotives which entered service on the South African Railways in those years.[1] [2]
Type MY1 tenders were built in 1952 and 1953 by Friedrich Krupp AG of Essen in Germany.
The Class S2 0-8-0 steam locomotive was designed by L.C. Grubb, Chief Mechanical Engineer of the South African Railways (SAR) from 1949 to 1954, as a shunting locomotive with a light axle load for harbour work where most of the trackwork was laid with light rail. The Type MY1 entered service as tenders to these locomotives.
The tender had a coal capacity of 81NaN1, a water capacity of 4200sigfig=3NaNsigfig=3 and a maximum axle loading of 8lt. It was a tank wagon type tender with a cylindrical water tank, similar in appearance to the North American Vanderbilt type tender. The SAR's Types MX, MY and MY1 tenders with their cylindrical water tanks all became commonly known as Torpedo tenders.[1] [2]
Like the Type CL, Type MX and Type MY tenders, it rode on three-axle Buckeye bogies to reduce the axle load.[1] [2]
While the tender was similar in general appearance and dimensions and had the same wheelbase as the Type MY tender of the Class 24, it had a different coal bunker top design. As was done with the tenders of the Classes S and S1 shunting locomotives, the top sides of the coal bunker were scalloped out to improve the crew's rearward field of vision.[1] [2]
Only the Class S2 locomotives were delivered new with Type MY1 tenders, which were numbered in the range from 3701 to 3800 for their engines. An oval number plate, bearing the engine number and often also the tender type, was attached to the rear end of the tenders.[1] [2]
Most of the Class S2 locomotives were placed in shunting service in the Durban, Table Bay and Port Elizabeth harbours, while some were also allocated to yards on the Witwatersrand and in the Eastern Transvaal.
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.[1] [2]
The second letter indicates the tender's water capacity, while a number, when added after the letter code, indicates differences between similar tender types, such as function, wheelbase or coal bunker capacity. The "_Y1" tenders had a capacity of 4200impgal.[1] [2]