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Wab794 – Technical Information

Wab794 – Technical Information

Makers No: 251
Built: 1927 by New Zealand Government Railway Workshops at Hillside, Dunedin, NZ.
Configuration: 4-6-4 T (Tank)
Gauge: 3ft 6in (1067mm)
Cylinders: Two
Bore and Stroke: 17 x 26 inches (431.8 x 660.4mm)
Axle loading: 14.3 tons (14.53 tonnes)
Driving Wheels: 4ft 6in (54 inches) (1371.6mm)
Heating Surface: 1050 sq feet (97.55 metres)
Superheater: 183 sq feet (17 metres)
Steam Pressure: 200 psi max (1380 kPa)
Grate Area: 33 sq feet (3.07 sq metres)
Coal Load: 3 tons (3.05 tonnes)
Water Load: 1700 gallons (7728.3 litres)
Tractive Effort: 22,250 lbs (10,092 kilograms)
Valve Gear Type: Walschaert
Weight: 74 tons (75.19 tonnes)
Adhesive Weight: 41.85 tons (42.52 tonnes)
Length: 44ft 5¾in (13.56 metres)
Operating Speed: 43 ½ mph (70km/h)
Approx Power: 1000bhp max (under ideal operating conditions)

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