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Highland Railway classes C “Small Ben” and U “Large Ben”
Great Britain | 1898 | 26 produced
LMS No. 14415 “Ben Bhach Ard”
LMS No. 14415 “Ben Bhach Ard”
flickr/stratfordman72

Starting in 1898, Peter Drummond had eight 4-4-0 locomotives built by Dübs, which were intended for passenger and express service and had inside cylinders. They were named after Scottish mountains, all of which start with “Ben”. Nine more followed between 1899 and 1901 from the Highland Railway workshops at Lochgorm and another three were built by North British in 1906. These were soon called “Small Bens”, as from 1908 six locomotives with larger boilers were supplied by North British. The Small Bens and Large Bens had identical dimensions for the driving wheels and cylinders. In the LMS the Large Bens were phased out by 1937 and the Small Bens partially survived the early years of British Railways.

VariantC (Small Ben)U (Large Ben)
General
Built1898-19061908-1909
ManufacturerDübs & Co., Lochgorm, North BritishNorth British
Axle config4-4-0 (American) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Service weight103,040 lbs117,152 lbs
Adhesive weight69,888 lbs78,848 lbs
Total weight187,040 lbs206,752 lbs
Axle load36,064 lbs39,872 lbs
Water capacity3,603 us gal3,180 us gal
Fuel capacitycoal
Power
Power sourcesteam
Starting effort17,891 lbf18,402 lbf
Power Plant
Driver diameter72 in
Boiler pressure175 psi180 psi
Expansion typesimple
Cylinderstwo, 18 1/4 x 26 in
Boiler
Grate area20.3 sq ft
Firebox area117 sq ft132 sq ft
Tube heating area1,061 sq ft1,516 sq ft
Evaporative heating area1,178 sq ft1,648 sq ft
Total heating area1,178 sq ft1,648 sq ft
Calculated Values
steam locomotive
passenger
express
Peter Drummond
last changed: 03/2023
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