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London & North Western Prince of Wales class
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Great Britain | 1911
245 produced
No. 5628 “R.B. Sheridan”
No. 5628 “R.B. Sheridan”
flickr/stratfordman72

The Prince of Wales class was a 4-6-0 express locomotive designed by Charles Bowen Cooke with inside cylinders and drivers with a diameter of 6 ft 3 in (1,905 mm). Essentially it was a superheated version of Whale's Experiment class with larger cylinders. A 4-6-2T tank locomotive built at the same time was called “Prince of Wales Tank”.

130 were built by the LNWR at Crewe, but also 20 more were contracted out to North British and 91 to Beardmore. Starting in 1924, they received Belpaire fireboxes. Four received Walschaerts valve gear for trials, but these remained the only ones. Withdrawals started in 1933 and at the beginning of World War II, only 22 were still in service. Six were passed over to British Railways, but all were gone before the actual renumbering could take place.

General
Built1911-1921, 1924
ManufacturerCrewe, North British, Beardmore
Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase26 ft 8 1/2 in
Rigid wheelbase13 ft 7 in
Service weight147,840 lbs
Adhesive weight105,280 lbs
Total weight235,760 lbs
Water capacity3,603 us gal
Fuel capacity13,440 lbs (coal)
Boiler
Grate area25 sq ft
Firebox area133.3 sq ft
Tube heating area1,439.7 sq ft
Evaporative heating area1,573 sq ft
Superheater area325 sq ft
Total heating area1,898 sq ft
Power Plant
Driver diameter75 in
Boiler pressure175 psi
Expansion typesimple
Cylinderstwo, 20 1/2 x 26 in
Power
Power sourcesteam
Estimated power1,100 hp (820 kW)
Starting effort21,671 lbf
Calculated Values
Optimal speed32 mph
steam locomotive
express
Charles John Bowen Cooke
last changed: 04/2025
LMS 25602 “Bonaventure”
LMS 25602 “Bonaventure”
flickr/stratfordman72
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