The reference for locomotives and railcars


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Cambrian Railways class 61
Great Britain | 1893 | 21 produced
Locomotive Magazine, April 1896

William Aston, who had been Cambrian's chief engineer since 1882, had already revised the six Beaconsfield class engines to cope with the increased train weights and tighter schedules. It was all about the express trains that transported holidaymakers to the tourist areas of Wales. From 1893, class 61 locomotives were procured to meet the increased requirements in this area, which represented an extension of the Beaconsfield class.

Compared to their predecessors, the locos received larger cylinders, larger drivers and a new boiler with 20 psi higher pressure and a larger firebox with larger grate. In the years 1893 to 1895, 16 pieces were made by Sharp, Stewart & Co., which received the numbers 61 to 72 and 81 to 84. Five more followed in 1897 by Robert Stephenson & Co., numbered 32, 47, 11, 85 and 86. Number 19 was special as it was not manufactured until 1901 in the Cambrian Railway's own workshops in Oswestry.

Built1893-1895, 1897, 1901
ManufacturerSharp, Stewart & Co., Robert Stephenson & Co., Owestry
Axle config4-4-0 (American) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase20 ft 3 1/2 in
Fixed wheelbase8 ft 3 in
Service weight90,160 lbs
Adhesive weight61,040 lbs
Total weight157,360 lbs
Axle load33,600 lbs
Water capacity3,002 us gal
Fuel capacity10,080 lbs (coal)
Power sourcesteam
Estimated power575 hp (429 kW)
Optimal speed25 mph
Starting effort14,688 lbf
Power Plant
Driver diameter72 in
Boiler pressure160 psi
Expansion typesimple
Cylinderstwo, 18 x 24 in
Grate area17 sq ft
Firebox area99.5 sq ft
Tube heating area1,057 sq ft
Evaporative heating area1,156.5 sq ft
Total heating area1,156.5 sq ft
Calculated Values
steam locomotive
William Aston
last changed: 10/2022

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