loco-info.com - New Zealand Railways class B.B

Dimensions and Weights
Length	52 ft 7 1/2 in
Wheelbase	22 ft 4 in
Rigid wheelbase	12 ft 4 in
Total wheelbase	45 ft 2 1/2 in
Service weight	97,440 lbs
Adhesive weight	72,800 lbs
Total weight	154,560 lbs
Axle load	18,200 lbs
Water capacity	2,042 us gal
Fuel capacity	8,960 lbs (coal)

Boiler
Grate area	28 sq ft
Firebox area	109 sq ft
Tube heating area	615 sq ft
Evaporative heating area	724 sq ft
Superheater area	208 sq ft
Total heating area	932 sq ft

Power Plant
Driver diameter	42.5 in
Boiler pressure	175 psi
Expansion type	simple
Cylinders	two, 17 x 22 in

Power
Power source	steam
Estimated power	700 hp (522 kW)
Optimal speed	20 mph
Top speed	40 mph
Starting effort	22,253 lbf

Calculated Values
Factor of adhesion	1 : 3.27
Power-to-weight ratio	0.0072 hp/lb
Heating Area Equivalent	1,685 sq ft
Cylinder volume/HAE	1 : 1045.49
Adhesive weight/Total	1 : 1.34
Tractive force/Heating area	1 : 5367.65
Grate area/Heating area	1 : 29.40
Firebox/Tube area	1 : 7.55
Total/Superheater	1 : 3.48

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