The reference for locomotives and railcars


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South Eastern & Chatham class D
Great Britain | 1901 | 51 produced
No. 735 with round-topped firebox
No. 735 with round-topped firebox
Locomotive Magazine, July 1901
D1 No. 494 with Belpaire firebox
D1 No. 494 with Belpaire firebox
Locomotive Magazine, January 1922

The Class D express locomotives were among Wainwright's first designs for the SE&CR. They were brightly colored to attract more public attention. They were built by different manufacturers, from 1905 also with Belpaire fireboxes. From 1913 Maunsell rebuilt some machines into the heavier class D1, which also had a Belpaire firebox. From around 1920, most of them received a superheater. A larger number of withdrawals took place from 1951 and the last rebuilt class D1 locomotives disappeared in 1961.

Variantround-topped fireboxBelpaire firebox
ManufacturerAshford, Dübs & Co., Sharp, Stewart & Co., Robert Stephenson & Co., Vulcan Foundry
Axle config4-4-0 (American) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Service weight112,000 lbs117,040 lbs
Adhesive weight73,584 lbs78,176 lbs
Total weight200,928 lbs204,624 lbs
Axle load38,080 lbs39,424 lbs
Water capacity3,963 us gal4,143 us gal
Fuel capacity11,200 lbs (coal)8,960 lbs (coal)
Power sourcesteam
Starting effort17,914 lbf
Power Plant
Driver diameter80 in
Boiler pressure175 psi
Expansion typesimple
Cylinderstwo, 19 1/4 x 26 in
Grate area20.3 sq ft20.2 sq ft
Firebox area124 sq ft136 sq ft
Tube heating area1,381 sq ft1,396 sq ft
Evaporative heating area1,505 sq ft1,532 sq ft
Total heating area1,505 sq ft1,532 sq ft
Calculated Values
steam locomotive
Harry Smith Wainwright
last changed: 04/2023

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