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New Zealand Railways classes KA and KB
New Zealand | 1939 | 35 produced
K<sup>A</sup> 946 around 1939
KA 946 around 1939
Albert Percy Godber / Godber Collection, Alexander Turnbull Library
VariantKAKB
General
Built1939-1945, 19501939
ManufacturerHutt, HillsideHillside
Axle config4-8-4 (Northern) 
Gauge3 ft 6 in (Cape gauge)
Dimensions and Weights
Length69 ft 8 in
Wheelbase34 ft 10 in
Fixed wheelbase14 ft 3 in
Service weight208,320 lbs214,591 lbs
Adhesive weight126,336 lbs125,441 lbs
Total weight326,815 lbs330,847 lbs
Axle load31,583 lbs31,361 lbs
Water capacity6,005 us gal
Fuel capacity1,885 us gal (oil)16,800 lbs (coal)
Power
Power sourcesteam
Estimated power1,600 hp (1,193 kW)1,500 hp (1,119 kW)
Optimal speed31 mph29 mph
Top speed75 mph
Starting effort32,741 lbf
Power Plant
Driver diameter54 in
Boiler pressure200 psi
Expansion typesimple
Cylinderstwo, 20 x 26 in
Boiler
Grate area47.7 sq ft
Firebox area190 sq ft
Tube heating area1,732 sq ft
Evaporative heating area1,922 sq ft
Superheater area392 sq ft
Total heating area2,314 sq ft
Calculated Values
steam locomotive
passenger
freight
booster
last changed: 09 2023
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