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GNR/LNER Ivatt "J2" Class 0-6-0


Class Types
GNR Class J21

General
Designer Ivatt
Introduced 1912
Pre-Grouping Great Northern Railway
Big Four London and North Eastern Railway
Description (1957) Class J2, a larger superheated version of class J1 built in 1912 after Gresley had succeeded Ivatt at Doncaster. Ten engines, wheel diameter 5'8", originally in class, No. 5024 having been scrapped in 1946. The last of the class was withdrawn in 1954.
Wheels 0-6-0
Number Built as J2 10
First in Service 08/1912
Last in Service 07/1954
Manufacturers
ManufacturerTotal
Doncaster Works 10
Orders
BuilderOrder #DateSize
Doncaster Works 269 1912 10

Power
Variant Introduced 1912
Tractive Effort 19,945lbs
Inside Cylinders 19" x 26" (2 off)
Inside Valves 8"Piston
Inside Motion Stephenson

Wheels
Drivers 5' 8"
Locomotive Wheelbase 16' 3"
Tender Wheelbase 13'
Total Wheelbase 39' 5"
Descriptive Wheelbase 7' 3" + 9' 0" + 10' 2" + 7' 0" + 6' 0"

Dimensions
Length (over buffers) 52' 812"
Weight (in running order) 93t 12cwt
Weight (loco only) 50t 10cwt
Maximum Axle Load 18t 0cwt
Water Capacity 3,500gal
Coal Capacity 6t 10cwt

Boiler & Firebox
Boiler Diagram 7Sup
Boiler Max Diameter 4' 8"
Boiler Barrel Length 10' 1"
Boiler Pressure 170lbs
Boiler Pitch 8' 9"
Firebox Length 6' 4"
Firebox Grate Area 19ft2
Firebox Heating Surface 120ft2
Tube Number 118
Tube Diameter 134"
Tube Area 562ft2
Flue Elements 18
Flue Diameter 514"
Flue Area 257ft2
Total Evaporative Area 937ft2
Superheater Elements 18
Superheater Element Diameter 114"
Superheater Element Area 192ft2
Total Heating Area 1129ft2