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Record: 71951 (21/04/2026)
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GNR/LNER Ivatt "D4" Class 4-4-0


Class Types
GNR Class D2
LNER Class D4

General
Designer Henry Ivatt
Introduced 1896
Pre-Grouping Company Great Northern Railway
Grouping Company London and North Eastern Railway
Wheel Arrangement 4-4-0
Number Built as D4 51
First in Service 12/1896
Last in Service 10/1951
Manufacturers
ManufacturerTotal
Doncaster Works 51
Orders
BuilderSponsorOrder #DateSize
Doncaster Works  n/a 10/1896 1
Doncaster Works  201 03/1897 10
Doncaster Works  204 08/1897 10
Doncaster Works  207 01/1898 10
Doncaster Works  213 10/1898 10
Doncaster Works  219 09/1899 10

Illustration
Copyright: John Law
Power
Variant Introduced 1896
Tractive Effort 14,805lbs
Inside Cylinders 17.5" x 26" (2 off)
Inside Valves Slide
Inside Motion Stephenson

Wheels
Pony 3' 8"
Drivers 6' 8"
Locomotive Wheelbase 21' 3"
Tender Wheelbase 13'
Total Wheelbase 42' 10"
Descriptive Wheelbase 6' 3" + 6' 9" + 8' 3", 6' 6" + 6' 6"

Dimensions
Length (over buffers) 52' 23⁄4"
Weight (in running order) 82t 17cwt
Adhesive Weight 27t 18cwt
Maximum Axle Load 14t 9cwt
Water Capacity 3,170gal
Coal Capacity 6t 0cwt

Boiler & Firebox
Boiler Diagram 11
Boiler Max Diameter 4' 5"
Boiler Barrel Length 10' 1"
Boiler Pressure 175lbs
Boiler Pitch 7' 53⁄4"
Firebox Length 5' 6"
Firebox Grate Area 16.25ft2
Firebox Heating Surface 103ft2
Tube Number 213
Tube Diameter 13⁄4"
Tube Area 1016ft2
Total Evaporative Area 1119ft2