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Record: 71951 (21/04/2026)
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MR/LMS Johnson "2601" Class 4-2-2


General
Designer Samuel Johnson
Introduced 1900
Pre-Grouping Company Midland Railway
Grouping Company London, Midland & Scottish Railway
Wheel Arrangement 4-2-2
Number Built as 2601 10
First in Service 12/1899
Last in Service 07/1922
Manufacturers
ManufacturerTotal
Derby Works 10
Orders
BuilderSponsorOrder #DateSize
Derby Works  1926 12/1899 10

Power
Variant Introduced 1900
Inside Cylinders 19.5" x 26" (2 off)
Inside Valves Slide

Wheels
Pony 3' 6"
Drivers 7' 91⁄2"
Truck 4' 4"
Locomotive Wheelbase 23' 11⁄2"
Descriptive Wheelbase 6' 0" + 7' 4½" + 9' 9" - 23' 1½" (engine only)

Dimensions
Weight (in running order) 50t 3cwt

Boiler & Firebox
Boiler Diagram F
Boiler Max Diameter 4' 2"
Boiler Barrel Length 10' 6"
Boiler Pressure 180lbs
Firebox Type Round Top
Firebox Length 8'
Total Evaporative Area 1217ft2
Total Heating Area 1217ft2