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GNR/LNER Ivatt "J6" Class 0-6-0


Class Types
GNR Class J22
LNER Class J6

General
Designer Ivatt
Rebuilt By Gresley
Introduced 1911
Pre-Grouping Great Northern Railway
Big Four London and North Eastern Railway
Wheels 0-6-0
Number Built 110
First in Service 08/1911
Last in Service 20/06/1962
Manufacturers
ManufacturerTotal
Doncaster Works 110
Orders
BuilderOrder #DateSize
Doncaster Works 266 1911 15
Doncaster Works 271 1912 10
Doncaster Works 273 1913 20
Doncaster Works 275 1913 10
Doncaster Works 278 1914 10
Doncaster Works 279 1914 10
Doncaster Works 282 1917 3
Doncaster Works 284 1918 2
Doncaster Works 285 1918 10
Doncaster Works 287 1919 10
Doncaster Works 291 1921 10

Power
521 Series 536 Series
Variant Introduced 1911 1912
Miscellaneous Differences   Boiler set further back with resultant smaller cab. Shorter chimney.
Tractive Effort 21,875lbs
As 521 Series
Inside Cylinders 19" x 26" (2 off)
As 521 Series
Inside Valves 8"Piston
As 521 Series
Inside Motion Stephenson
As 521 Series

Wheels
521 Series 536 Series
Drivers 5' 2"
As 521 Series
Locomotive Wheelbase 16' 3"
As 521 Series
Tender Wheelbase 13'
As 521 Series
Total Wheelbase 38' 10"
As 521 Series
Descriptive Wheelbase 9' 0" + 7' 3" + 9' 6" + 7' 0" + 6' 0" = 38' 10"
As 521 Series

Dimensions
521 Series 536 Series
Length (over buffers) 52' 6"
As 521 Series
Weight (in running order) 93t 12cwt
As 521 Series
Weight (loco only) 50t 10cwt
As 521 Series
Maximum Axle Load 18t 0cwt
As 521 Series
Water Capacity 3,500gal
As 521 Series
Coal Capacity 6t 10cwt
As 521 Series

Boiler & Firebox
521 Series 536 Series
Boiler Diagram 7 Sup
As 521 Series
Boiler Max Diameter 4' 8"
As 521 Series
Boiler Barrel Length 10' 1"
As 521 Series
Boiler Pressure 170lbs
As 521 Series
Boiler Pitch 8' 6"
As 521 Series
Firebox Length 6' 4"
As 521 Series
Firebox Grate Area 19ft2
As 521 Series
Firebox Heating Surface 118ft2
As 521 Series
Tube Number 118
As 521 Series
Tube Diameter 134"
As 521 Series
Tube Area 562ft2
As 521 Series
Flue Elements 18
As 521 Series
Flue Diameter 514"
As 521 Series
Flue Area 257ft2
As 521 Series
Total Evaporative Area 937ft2
As 521 Series
Superheater Elements 18
As 521 Series
Superheater Element Diameter 114"
As 521 Series
Superheater Element Area 192ft2
As 521 Series
Total Heating Area 1129ft2
As 521 Series