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Record: 10235 (26/09/2023)
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GNR/LNER Ivatt "J3" Class 0-6-0


Class Types
GNR Class J4
LNER Class J3

General
Designer Henry Ivatt
Rebuilt By Gresley
Introduced 1896
Pre-Grouping Company Great Northern Railway
Grouping Company London and North Eastern Railway
Description (1957) Class J3. Stirling and Ivatt 5'2" 0-6-0's rebuilt with larger 4'8" boilers. No. 64163 was formerly M. & G.N.J.R. No. 88. The last two of the class to remain in service were withdrawn at the end of 1954.
Wheel Arrangement 0-6-0
Number Built as J3 0
Conversions from other classes 165
Last in Service 12/1954
Manufacturers
ManufacturerTotal
Doncaster Works 59
Vulcan Foundry 5
Dübs & Co 78
Kitson 23
Classification Southern Area 2
Route Availability 3
BR Power Class 2F
Engine Diagrams
DiagramDetails
Section N, 1924 Chimney height 13ft 3⅞in, 3,170 gallon tender. Drawing show sandbox on leading splasher.
Section N, 1938 Alternative chimney heights of 13ft. 3⅞in. and 12ft 7⅞in. Drawing shows sandboxes either side of middle splasher.

Power
Variant Introduced 1912
Tractive Effort 19,105lbs
Inside Cylinders 17.5" x 26" (2 off)
Inside Valves Slide
Inside Motion Stephenson

Wheels
Drivers 5' 2"
Locomotive Wheelbase 15' 6"
Tender Wheelbase 13'
Total Wheelbase 36' 1112"
Descriptive Wheelbase 7' 3" + 8' 3" + 8' 5½" + 6' 6" + 6' 6" = 36' 11½"

Dimensions
Length (over buffers) 49' 6"
Weight (in running order) 81t 2cwt
Weight (loco only) 42t 12cwt
Adhesive Weight 42t 12cwt
Maximum Axle Load 16t 0cwt
Water Capacity 3,170gal
Coal Capacity 6t 0cwt

Boiler & Firebox
Boiler Diagram 8
Boiler Max Diameter 4' 8"
Boiler Barrel Length 10' 1"
Boiler Pressure 175lbs
Boiler Pitch 7' 914"
Firebox Length 5' 6"
Firebox Grate Area 16.25ft2
Firebox Heating Surface 105ft2
Tube Number 238
Tube Diameter 134"
Tube Area 1130ft2
Total Evaporative Area 1235ft2
Total Heating Area 1235ft2