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GCR/LNER Robinson "Q4" Class 0-8-0


Class Types
GCR Class 8A

General
Designer Robinson
Introduced 1902
Pre-Grouping Great Central Railway
Big Four London and North Eastern Railway
Description (1957) Class Q4, Robinson G.C.R. 0-8-0's, originally 89 engines built between 1902-11, with 4'8"wheels and 2 outside cylinders. Several of the class were superheated and some were fitted with piston valves. The class as a whole was withdrawn from 1934 onwards. It is interesting to note that 13 locomotives of this class were rebuilt as tank engines, see Nos. 69925-69937.
Wheels 0-8-0
Number Built as Q4 89
Number Scrapped 89
First in Service 1902
Last in Service 15/09/1959
Manufacturers
ManufacturerTotal
Gorton Works 35
Kitson 51
Neilson, Reid & Co. 3

Power
Q4/1 Q4/2
Variant Introduced 1902
As Q4/1
Tractive Effort 25,644lbs
As Q4/1
Outside Cylinders 19" x 26" (2 off)
As Q4/1
Outside Valves Slide
As Q4/1
Outside Motion Stephenson
As Q4/1

Wheels
Q4/1 Q4/2
Drivers 4' 8"
As Q4/1
Locomotive Wheelbase 17' 1"
As Q4/1
Total Wheelbase 42' 612"
As Q4/1
Descriptive Wheelbase 5' 8½" + 5' 5½" + 5' 11" - 11' 5½" - 6' 6" + 6' 6" = 42' 6½"
As Q4/1

Dimensions
Q4/1 Q4/2
Length (over buffers) 58' 234"
As Q4/1
Weight (loco only) 62t 8cwt 63t 0cwt
Maximum Axle Load 17t 0cwt
As Q4/1

Boiler & Firebox
Q4/1 Q4/2
Boiler Diagram 17Sat 17Sup
Boiler Max Diameter 4' 9" 4' 9"
Boiler Barrel Length 15' 15'
Boiler Pressure 180lbs 180lbs
Boiler Pitch 8' 414"
As Q4/1
Firebox Length 7' 9" 7' 9"
Firebox Grate Area 23.62ft2 23.62ft2
Firebox Heating Surface 140ft2 140ft2
Tube Number 207 94
Tube Diameter 2" 2"
Tube Area 1665ft2 756ft2
Flue Elements   21
Flue Diameter   514"
Flue Area   442ft2
Total Evaporative Area 1805ft2 1338ft2
Superheater Elements   21
Superheater Element Diameter   1116"
Superheater Element Area   230ft2
Total Heating Area 1805ft2 1568ft2