South African type JV tender

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The South African type JV tender was an experimental steam locomotive tender built in 1936 by the South African Railways at Salt River, Cape Town. It was designed by A.G. Watson as a test model for the Type FT tender to be used with the Class 21 2-10-4 locomotive.

Key features
- Configuration: 2-8-2 wheel arrangement (six axles) with leading and trailing wheels on Bissel pony trucks and four rigid axles in the center. The idea was to spread the frame load to reduce weight.
- Brakes: vacuum cylinders mounted on top of the tank behind the coal bunker due to space limits.
- Left side: space for fire irons and rakes; stowage on top, connected to the coal bunker by four straps.
- Capacity: coal 15 long tons; water 7,250 imperial gallons.
- Weight and size: gauge 3 ft 6 in; length 35 ft 3 7/16 in; wheel diameter 34 in; wheelbase 24 ft 11 in; empty weight 68,620 lb (31,130 kg); working weight about 78 long tons (79,250 kg).
- Stoking and couplers: manual stoking; couplers Drawbar and AAR knuckle.
- Service use: numbered N60, a non-revenue vehicle, tested behind a manually stoked Class 15F locomotive.
- Classification: the “N” indicates non-revenue, with the “J” tender type used with certain locomotive classes, and “V” indicating water capacity around 7,250–7,500 gallons.

This experimental JV tender was a prototype for evaluating weight-saving ideas and the design influenced later tender concepts.