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London & North Western Whale Precursor class
Great Britain | 1904 | 130 produced
No. 513 “Precursor”
No. 513 “Precursor”
J.R. Howden, „The Boys' Book of Locomotives”
Variant19 inch20½ inch
General
Built1904-1907
ManufacturerCrewe
Axle config4-4-0 (American) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase25 ft 1 1/2 in47 ft 3 3/4 in
Fixed wheelbase10 ft
Total wheelbase47 ft 3 3/4 in
Service weight132,160 lbs
Adhesive weight85,120 lbs
Total weight201,600 lbs
Axle load42,560 lbs
Water capacity4,323 us gal
Fuel capacity14,112 lbs (coal)
Power
Power sourcesteam
Estimated power925 hp (690 kW)
Optimal speed34 mph29 mph
Starting effort17,237 lbf20,066 lbf
Power Plant
Driver diameter81 in
Boiler pressure175 psi
Expansion typesimple
Cylinderstwo, 19 x 26 intwo, 20 1/2 x 26 in
Boiler
Grate area22.4 sq ft
Firebox area161.3 sq ft
Tube heating area1,848.7 sq ft
Evaporative heating area2,010 sq ft
Total heating area2,010 sq ft
Calculated Values
steam locomotive
express
last changed: 10 2023
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