| NZR R class |
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| Specifications |
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Configuration:
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| • Whyte | 0-6-4T |
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| Gauge | 3 ft 6 in (1,067 mm) |
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| Driver dia. | 36.5 in (0.927 m) |
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| Wheelbase | 21 ft 10 in (6.65 m) |
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| Adhesive weight | 20 long tons (20.3 t; 22.4 short tons) |
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| Loco weight | 33 long tons (33.5 tonnes; 37.0 short tons) |
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| Firebox: | |
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| • Grate area | 11.8 sq ft (1.10 m2) |
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| Boiler pressure | 160 lbf/in2 (1,103 kPa) |
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| Heating surface | 556 sq ft (51.7 m2) |
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| Cylinders | Two, outside |
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| Cylinder size | 12.25 in × 16 in (311 mm × 406 mm) |
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| Performance figures |
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| Maximum speed | 53 mph (85 km/h) |
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| Tractive effort | 8,420 lbf (37.45 kN) |
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The NZR R class was a class of early 0-6-4T single Fairlie steam locomotives operated by New Zealand's Railways Department (NZR) between 1879 and 1936.
