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Record: 71951 (21/04/2026)
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CR/LMS McIntosh "140" Class 4-4-0 - 'Dunalastair IV'


Class Types
CR Class 140
CR Class 140 Super
(Also known as) Dunalastair IV

General
Designer John McIntosh
Introduced 1904
Pre-Grouping Company Caledonian Railway
Grouping Company London, Midland & Scottish Railway
Wheel Arrangement 4-4-0
Number Built as 140 19
Manufacturers
ManufacturerTotal
St. Rollox Works 19
Orders
BuilderSponsorOrder #DateSize
St. Rollox Works  Y72 1904 5
St. Rollox Works  Y76 1905 6
St. Rollox Works  Y85 1907 5
St. Rollox Works  Y92 1910 3

Power
140 140 Super
Miscellaneous Differences   Superheated
Tractive Effort 18,411lbs 19,751lbs
Inside Cylinders 19" x 26" (2 off) 20.25" x 26" (2 off)
Inside Valves Slide Slide
Inside Motion Stephenson Stephenson

Wheels
140 140 Super
Pony 3' 6"
As 140
Drivers 6' 6"
As 140
Locomotive Wheelbase 23' 10"
As 140
Descriptive Wheelbase 6' 6" + 7' 7" + 9' 9" = 24' 0" (engine only)
As 140

Dimensions
140 140 Super
Weight (loco only) 56t 10cwt
As 140
Water Capacity 4,300gal
As 140

Boiler & Firebox
140 140 Super
Boiler Pitch 8' 3"
As 140