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Record: 71951 (21/04/2026)
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CR/LMS McIntosh "139" Class 4-4-0


Class Types
CR Class 139
CR Class 139 Y101

General
Designer John McIntosh
Introduced 1910
Pre-Grouping Company Caledonian Railway
Grouping Company London, Midland & Scottish Railway
Wheel Arrangement 4-4-0
Number Built as 139 11
Manufacturers
ManufacturerTotal
St. Rollox Works 11
Orders
BuilderSponsorOrder #DateSize
St. Rollox Works  Y92 1910 1
St. Rollox Works  Y97 1911 4
St. Rollox Works  Y101 1912 6

Power
139 139 Y101
Miscellaneous Differences   Slightly altered superheater
Tractive Effort 19,751lbs
As 139
Inside Cylinders 19" x 26" (2 off) 19" x 26" (2 off)
Inside Valves Piston Piston
Inside Motion Stephenson Stephenson

Wheels
139 139 Y101
Pony 3' 6"
As 139
Drivers 6' 6"
As 139
Locomotive Wheelbase 23' 10"
As 139
Descriptive Wheelbase 6' 6" + 7' 7" + 9' 9" = 24' 0" (engine only)
As 139

Dimensions
139 139 Y101
Weight (loco only) 59t 0cwt
As 139

Boiler & Firebox
139 139 Y101