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Great Western Railway class 157
Great Britain | 1862 | 20 produced
Later Dean variant
Later Dean variant
Locomotive Magazine, January 1907
Original variant
Original variant
Locomotive Magazine, January 1907
Variantas builtDean 1878
General
Built18621878-1879
ManufacturerSharp, Stewart & Co.Swindon
Axle config2-2-2 (Jenny Lind) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Total wheelbase16 ft
Service weight66,572 lbs80,976 lbs
Adhesive weight28,678 lbs36,960 lbs
Axle load28,678 lbs36,960 lbs
Fuel capacitycoal
Power
Power sourcesteam
Estimated power300 hp (224 kW)450 hp (336 kW)
Optimal speed24 mph26 mph
Starting effort8,082 lbf11,016 lbf
Power Plant
Driver diameter84 in
Boiler pressure130 psi140 psi
Expansion typesimple
Cylinderstwo, 16 x 24 intwo, 18 x 24 in
Boiler
Grate area14.6 sq ft19.3 sq ft
Firebox area115 sq ft
Tube heating area1,099.3 sq ft
Evaporative heating area1,240.8 sq ft1,214.3 sq ft
Total heating area1,240.8 sq ft1,214.3 sq ft
Calculated Values
steam locomotive
express
last changed: 10 2023
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